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Ballistic is a highly-accurate ballistic calculator and range companion. With its advanced capabilities, Ballistic can calculate for atmospheric conditions, Coriolis effect, gyroscopic spin, and .... H6528 038

The JBM Ballistics computer, written by James B. Millard, is among the world's finest ballistic engines in existence. Used by competition shooters, hunters, and the military, this powerful ballistics library delivers precision results. Results is what it's really about, isn't it? The JBM engine also adds new features such as velocity ...August 1st, 2013 Updated URLs for JBM Online Ballistics Program. The web-based JBM Ballistics Program is one of the most sophisticated and accurate ballistics calculators available — and it’s free. The latest version of the JBM Trajectory Calculator includes field-test-derived actual G7 BCs, as well as bullet drag data from Lapua’s Doppler radar testing.From accurate trajectory calculations to drop and wind drift compensations, these apps have you covered. With a variety of features that include range and elevation calculations, weather conditions, and more, you'll be able to make the most out of your JBM Ballistics Calculator. Read on to discover which app is the best for your needs.Trajectory Card. Calculate a trajectory card from bullet, velocity, firearm and atmospheric parameters. Density is calculated using input density altitudes. Muzzle velocity is found by using linear interpolation between two velocities measured as a fuction of temperature. Explanation of termsBallistic is a fast, highly-accurate ballistic trajectory calculator and range companion for the iPhone. Currently $3.99 US. Ballistic_XLR A modified Pejsa model implemented in a spreadsheet. Free. Ballistic Explorer by Oehler Research External ballistics programs for DOS and Windows with demo. $60-$70. Ballistik Pro 1.1Alexa can now read the room (sort of) and adjust the volume of her voice accordingly. It’s pretty unlikely that the noise level in your home is consistent. At any given time, there...Many modern ballistics programs, including the free online JBM Ballistics Program, are able to use BCs referenced to G7 standards. When available, these BCs are more appropriate for long range bullets, according to Bryan. [Editor's NOTE: BCs are normally reported simply as an 0.XXX number. The lb/in² tag applies to all BCs, but is commonly ...The web-based JBM Ballistics Program is one of the most sophisticated and accurate ballistics calculators available — and it’s free. The latest version of the JBM Trajectory Calculator includes field-test-derived actual G7 BCs, as well as bullet drag data from Lapua’s Doppler radar testing. You can also change weather variables, and ... Ballistics, the industry’s premiere ballistic calculator solution, is a must for any serious shooting looking to fine true zero for their rifle. Ballistic is powered by the JBM Ballistics Computer, one of the most accurate ballistic engines available, and comes with a library of 5,300 projectiles and loads, along with performance data from ... The ballistic coefficient is represents the ratio of the drag of the standard (e.g. G1 standard bullet) bullet to that of the bullet you are shooting. A ballistic coefficient of 0.100 means that your bullet has 10 times the drag of the standard bullet. Barrel Twist The twist length of the barrel. Twist DirectionRe: Which Ballistic Calculator Is Correct ?? Hello,I have a problem with my JBM ballistic calculator.I think that there is something wrong with it because ,when I try to use spindrift calculation I obtain a wrong windage :I shoot with right-hand twist barrel with 22sm rate twist ,when I try to find the windage at 1000m ;wind velocity 2m/s;wind angle 270 degree(a cross wind from left to right ...Advertisement The theory of evolution explains how strands of DNA change. An X-ray, cosmic ray, chemical reaction or similar mechanism can modify a base pair in the DNA strand to c...Ballistics calculations and formulas for small arms. Bullet Lengths I am in the process of adding bullet lengths to the library so that the drift can be easily calculated.Ballistics calculations and formulas for small arms. Drag Function Conversion. Convert a ballistic coefficient from one drag function to another.Trajectory. Calculate a trajectory from bullet, velocity, firearm and atmospheric parameters. Explanation of terms. Library (Select bullet or enter BC and Weight below.) [?]From the CD & KD discussion, the vector equations of motion are. d u /dt = -k v ( u - w ) + g. where. k = p s C D / (2 M) If we assume that g is in the z direction only and the only wind is a cross wind (| w | = w x) then the first equation can be rewritten as three equations. du x /dt = -k v ( u x - w x )This means that it is the ratio of the drag function and ballistic coefficient that model the drag of the bullet. For different drag functions, the Cs will be different, but with properly chosen Cs and drag functions, the same trajectory will be calculated because the drag force is the same.From the CD & KD discussion, the vector equations of motion are. d u /dt = -k v ( u - w ) + g. where. k = p s C D / (2 M) If we assume that g is in the z direction only and the only wind is a cross wind (| w | = w x) then the first equation can be rewritten as three equations. du x /dt = -k v ( u x - w x )Kestrel® 5700 Ballistics Weather Meter with Hornady® 4DOF®. Combining complete onsite environmental measurements with the precise trajectory solutions of the integrated Hornady 4DOF ® ballistics solver, this rugged all-in-one handheld unit delivers the convenience you want and the accuracy you need for long-range success under any conditions.Table 6 compares Nosler and Litz BCs for the Ballistic Tip to determine the average overestimate which is 6.33%. The Nosler 120 grain NBT in .284 had the highest overestimate at 12.7%, with the 115 grain .257 NBT and the 125 grain .308 NBT also having substantial overestimates at 10.76% and 9.58%, respectively.JBM ballistics is the best thing I have found and I do a LOT of long range shooting and I fancy myself pretty proficient at it. Just make sure you measure your scope height from the center of the scope down to the center of your bold for the closes number you can. then shoot!Re: Best ballistic calculator ? I mostly use JBM and use Ballistic on the Touch when I'm away from the computer. Ballistic has the option of using the JBM engine, so its results are the same. If you had a small laptop or netbook that you just wanted to haul along to the range, then Litz' program from Berger will certainly work.The ballistic coefficient is represents the ratio of the drag of the standard (e.g. G1 standard bullet) bullet to that of the bullet you are shooting. A ballistic coefficient of 0.100 means that your bullet has 10 times the drag of the standard bullet. Bullet Length The length of the bullet.Both Winchester and JBM ballistics have fairly comprehensive libraries with all of this information included with particular Winchester cartridges or bullets in the case of JBM Ballistics. The final piece of information you'll need is the height of the center line of your scope over the rifle bore. In most modern firearms this ranges from ...Changing Variables of Integration. From the discussion on CD and KD, we know that the acceleration of the bullet is. a = - k v + g. where. k = = p/p 0 G (m)/C. Rewrite the acceleration as a derivative. a = d u / dt = - k ( u - w) + g. Define a coordinate system where y is the range variable, x and z are perpendicular to the trajectory where x ...JBM Ballistics has partnered with RIANOV to provide integrated ballistics solutions, including the M06 passive ranging calculator, the SOLO calculator and the CSI. The CSI is a new digital angle indicator giving both cant and slope (or cosine of slope). RIANOV™ CSI unit mounted to Remington 700 ... Ballistics calculations and formulas for small arms. This is the new home of JBM's online ballistics resources. Much of this will look familiar to you -- just use the links to the left to find what you're looking for. Define a coordinate system where y is the range variable, x and z are perpendicular to the trajectory where x is to the shooters right and z is up. Then rewrite the derivative d u / dt a = d u / dt = (d u / dy) (dy/dt) = - k (u - w)+ g. But dy/dt is just the velocity in the y direction (down range) written u y, thenBullets % Percentage 1 Hornady, ELD-X (Extremely Low Drag - eXpanding), 0.264 cal, 143.0 gn 2.0 2 Sierra, HPBT MatchKing™, 0.308 cal, 175.0 gnThe world-renowned JBM Ballistics engine powers all Ballistic computations. Ballistic is used by competition shooters, long-range hunters, and the military to deliver the most precise calculations possible. With Ballistic, you'll be able to make the most accurate calculations for every shot, everywhere, even in areas with no cellular coverage.In this video we will be going over how to calculate a firing solution for long range shooting using JBM ballistics. The targets engaged in the introduction ...The BC, or ballistic coefficient is defined as: BC = w / [i d 2] here the diameter is specified in inches and the weight in pounds and the form factor is found using: i = CD / CD G. The sectional density is defined as: SD = w / d 2. making the ballistic coefficient BC = SD / iA drag function (or G function) provides the forces on a standard bullet for which the drag function was derived. A bullet's ballistic coefficient then relates the drag on any bullet to that of the standard bullet. The velocity of the bullet at the beginning of the measured distance. The barometric pressure.Ballistic Tip™ Spitzer Leadfree: 0.950: 0.243: 55.0: Combined Technologies™ Varmint; Spitzer: 0.790: 0.243: 55.0: Varmageddon FB Tipped: 0.750: 0.243: 55.0: Varmageddon … JBM Ballistics. This is the new home of JBM's online ballistics resources. Much of this will look familiar to you -- just use the links to the left to find what you're looking for. Ballistics calculations and formulas for small arms. Since w x is constant, one can readily perform the integrals (assuming constant k) . u x = w x [ 1 - u y /u x0] . Integrate one more time with respect to t on the interval [0,t] x = ∫ u x dt [0,t] = w x [ t - R/u x0] . where R = ∫ u y dt [0,t] . and x is the deflection, u x0 is the muzzle velocity (initial velocity in the y direction), R is the range, t is the time of flight to that …Ballistics calculations and formulas for small arms. Drag Function Conversion. Convert a ballistic coefficient from one drag function to another.14 August 2009 -- Fixed sign bug in MPM. 12 August 2009 -- Changed name of site from JBM Small Arms Ballistics to JBM Ballistics. This better matches the domain name. 11 August 2009 -- Added statistics for bullet selection. They are located here . 10 August 2009 -- Modified output of programs.I use jbmballistics online and would like to take my portable with me to the range. No internet there, need stand alone jbm or similar program.The ballistic coefficient is represents the ratio of the drag of the standard (e.g. G1 standard bullet) bullet to that of the bullet you are shooting. A ballistic coefficient of 0.100 means that your bullet has 10 times the drag of the standard bullet. Bullet LibraryBallistic Coefficient The calculated ballistic coefficient for the selected drag function. Atmospheric Density The calculated density of the air. Far Velocity The calculated velocity at the end of the measured distance. Speed of Sound The calculated speed of sound.1. Mirrors output from online version of JBM Ballistics we often use for initial calculations. 2. Controls are simple to use and (mostly) intuitive. 3. Handy comparison feature lets you compare ballistics for different projectiles side by side. 4. Advanced Wind Kit allows you to account for complex wind situations. 5.Shot the 300 BO the other day as I am dedicating this rifle to subsonic only. Took a 25 yard zero start, shot 10 rounds (5 at target 4 and 5 at target 5). Great targets. Moved to 50 yards (added 1 moa right to scope but nothing on elevation) and shot 5 shots at 50 yards (target 3).Trajectory μCard. Calculate a trajectory card from bullet, velocity, firearm and atmospheric parameters. Density is calculated using input density altitudes. Muzzle velocity is found by using linear interpolation between two velocities measured as a fuction of temperature. Explanation of terms.JBM Ballistics has partnered with RIANOV to provide integrated ballistics solutions, including the M06 passive ranging calculator, the SOLO calculator and the CSI. The CSI is a new digital angle indicator giving both cant and slope (or cosine of slope). RIANOV™ CSI unit mounted to Remington 700 ...Ballistic's world renowned JBM ballistics engine delivers the gold standard in calculations that other applications compare themselves to. iPad-Specific Features: NEW: iPad Air 2 internal ...Trajectory μCard - Constant Drop. Calculate a trajectory card from bullet, velocity, firearm and atmospheric parameters. Density is calculated using input density altitudes. Muzzle velocity is found by using linear interpolation between two velocities measured as a fuction of temperature. Explanation of terms.Drag Function Array Conversion. Convert multiple ballistic coefficients and find the best new drag function. Explanation of terms. Drag Function [?] Velocity Units [?] Caliber (0.100 to 2.000 in) [0.308] [?]Jut go to JBM ballistic calculator and use the same bullet for different twist or different velocities. You should be able to understand it better. Going from 20" to 22" might not be significant change in velocity, but going from 16 to 24 could be, it could be critical enough whether your bullets tumble or stay true.Applied Ballistics for Long Range Shooting Bryan Litz, Applied Ballistics LLC, 2009. Lots of good information here including accurate measurements of G7 BCs for a number of long range bullets and a ballistics software CD. Ballistic of the Future, J. M. J. Kooy and J. W. H. Uytenbogaart, McGraw-Hill Book Company, Inc.If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.Ballistics calculations and formulas for small arms. Drag/Twist Specific Gravities Definition Specific Gravity: The ratio of the weight of an object to the weight of an equal volume of pure water at its maximum density, which is at 4 deg. C.Ballistic Coefficients BCs and different drag functions? What is the best one to use? Cant Derivations of the equations used in corrections to the elevation and azimuth of a canted firarem. CD and KD Derivations of the equations used in the point mass trajectory calculations. It includes equations for CD, BC and KD. CrosswindA ballistic table (also called ballistic chart, ballistic card, or data card), is a table containing a set of data regarding the external ballistics of an ammo or, to be more precise, of a particular bullet fired in particular conditions. The data contained in the table allows you to easier calculate the sight adjustments needed to shoot at ...Ballistic is a fast, highly-accurate ballistic trajectory calculator and range companion for the iPhone. Currently $3.99 US. Ballistic_XLR A modified Pejsa model implemented in a spreadsheet. Free. Ballistic Explorer by Oehler Research External ballistics programs for DOS and Windows with demo. $60-$70. Ballistik Pro 1.1Applied Ballistics for Long Range Shooting Bryan Litz, Applied Ballistics LLC, 2009. Lots of good information here including accurate measurements of G7 BCs for a number of long range bullets and a ballistics software CD. Ballistic of the Future, J. M. J. Kooy and J. W. H. Uytenbogaart, McGraw-Hill Book Company, Inc.You can, but not very accurately. If you look at the bullet drop for two bullets, one with a BC of 0.5 and the other with a BC of 0.55, you'll find that the bullet drops at 300 yards with a muzzle velocity of 3000 f/s and a 100 yard zero, are -10.9" and -10.7" respectively. So if you can shoot groups less than 0.2" at 300 yards, have at it.Table 6 compares Nosler and Litz BCs for the Ballistic Tip to determine the average overestimate which is 6.33%. The Nosler 120 grain NBT in .284 had the highest overestimate at 12.7%, with the 115 grain .257 NBT and the 125 grain .308 NBT also having substantial overestimates at 10.76% and 9.58%, respectively.The location “is in mountainous terrain close to the border with China, so it is difficult for the US to hit it with a preemptive strike." When North Korea launched its second inte...Trajectory μCard - Constant Drop. Calculate a trajectory card from bullet, velocity, firearm and atmospheric parameters. Density is calculated using input density altitudes. Muzzle velocity is found by using linear interpolation between two velocities measured as a fuction of temperature. Explanation of termsBallistics Calculator. Bullet Library. Select a bullet from the list or enter in the properties below. Bullet Properties. Diameter. inches. Weight. grains. BC.World renowned JBM ballistics engine for the most precise, accurate calculations in the industry. Load Library: Nearly 5,000 commercial and military projectiles and factory loads from leading manufacturers or specify your own projectile properties. Includes latest commercial data and military coefficients established at Aberdeen Proving Grounds.Plastic Tip Length. Length of the plastic "ballistic tip" if it exists. Otherwise zero. Caliber. Diameter of the bullet. Muzzle Velocity. The velocity of the bullet as either (1) measured at some distance from the muzzle or (2) as estimated from reloading data. The on-line ballistics page can correct for the distance to chronograph.It's also much more. With a vast library of nearly 5,000 projectiles and factory loads, rangefinder, range log, and head-up display, Ballistic is a complete mobile companion for hunting or at the range. Ballistic's world renowned JBM ballistics engine delivers the gold standard in calculations that other applications compare themselves to.Ballistic's world renowned JBM ballistics engine delivers the gold standard in calculations that other applications compare themselves to. iPad-Specific Features: NEW: iPad Air 2 internal ...The G7 Ballistic coefficient does a better job of predicting the trajectory of modern long ogive, boat tail bullets to longer ranges than the G1 standard, however, it is still not modeling the exact Cd value or shape and will result in errors. Utilizing the popular and well-designed JBM ballistics code, Error! Reference source not found.. shows ...24. 24. SPECIFICATIONS ARE NOMINAL BALLISTICS FIGURES ESTABLISHED IN TEST BARRELS. INDIVIDUAL FIREARM MAY VARY FROM TEST BARREL RESULTS . 0.0 INDICATES YARDAGE AT WHICH FIREARM WAS SIGHTED IN. * TEST BARREL LENGTH IN INCHES. †† WARNING: FULL PRESSURE LOAD. NOT FOR USE IN ALL 45-70 RIFLES. INJURY OR DEATH MAY RESULT FROM USE IN FIREARMS NOT ...Ballistics calculations and formulas for small arms. Recoil. Calculate recoil from muzzle velocity and bullet, powder and rifle weight.JBM Ballistics is a powerful ballistics calculation tool, but it does have some limitations: first, it doesn’t calculate Coriolis effect; second, it doesn’t have separate columns for spin drift (which is calculated with wind drift) and uphill/downhill. For now, we will set aside Coriolis, spin drift, and uphill/downhill calculations.Jan 16, 2018. Messages. 846. Sep 4, 2022. #1. Tested out some Hammers over the last few weeks, and thought I'd publish my findings on the ballistic coefficients. Tested using LabRadar and a Kestrel for environmentals. Used JBM Ballistics online calculator (click here). I shoot in a flat dirt field, so the LabRadar tracks exceptionally well, as ...k 4 = h F ( x n + h, y n + k 3 ) The equations of motion for a bullet in flight, are simultaneous coupled differential equations. Specifically three equations for acceleration, position and spin. These equations may have been transformed using the substitution: d u /dt = d u /dy dy/dt = d u /dy u y.I'm getting internal server errors-500 at JBM Ballistics. Anyone know what is going on or when it will be back up? ... Accuracy Ballistics Gear Reviews Long Range Shooting Marksmanship Precision Rifles Rifle Scopes Sniper Rifles. Featured. Forums. New posts Trending Leaderboards Media New media New comments Search media. Resources. Latest ...JBM has a pretty good listing for many calibers. JBM Ballistics bullet lengths But it doesn't have some of the common off the shelf AR15 ammo. Here is a few I have sampled, pulling the bullet out of the cartridge (Hornady "hammer" looking device). 0.962" 75g Hornady Frontier 5.56 HPBT Match 0.945" 75g Tula .223 HPBT (steel case, bimetal jacket)Plastic Tip Length. Length of the plastic "ballistic tip" if it exists. Otherwise zero. Caliber. Diameter of the bullet. Muzzle Velocity. The velocity of the bullet as either (1) measured at some distance from the muzzle or (2) as estimated from reloading data. The on-line ballistics page can correct for the distance to chronograph.The JBM Ballistics computer, written by James B. Millard, is among the world's finest ballistic engines in existence. Used by competition shooters, hunters, and the military, this powerful ballistics library delivers precision results. Results is what it's really about, isn't it? The JBM engine also adds new features such as velocity ...Ballistic's world renowned JBM ballistics engine delivers the gold standard in calculations that other applications compare themselves to. This is the STANDARD Edition. The ADVANCED Edition also includes: - iPhone internal barometer supported. - An advanced head-up display for mounted operation. - Advanced wind kit configurable for up to 8 wind ...Ballistics calculations and formulas for small arms. Additionally, the calculated elevation is 6.10 MOA. This calculated value is shown above the trajectory table in the output of the calculation.The Ballistic: Advanced Edition app operates using the JBM ballistics engine and has a library of almost 5,000 different commercial and military projectiles and factory loads from leading manufacturers. The app can calculate for atmospheric conditions, Coriolis effect and gyroscopic spin and provides ballistic charts in which the user can ...10 May 2010 -- Add JLK bullets. 3 May 2010 -- Complete update of website for announcement of BallistiComp. 15 March 2010 -- Modified point mass calculations to include changes in atmosphere when shooting uphill and downhill. 11 January 2010 -- Fixed humidity output units and updated bullet library. 16 November 2009 -- Fixed a drop units bug in ...This calculator will produce a ballistic trajectory chart that shows the bullet drop, bullet energy, windage, and velocity. It will a produce a line graph showing the bullet drop and flight path of the bullet. By adding trajectories to the panel on the right you may produce charts and graphs that show the different trajectories side by side.Ballistic coefficient (BC) is a fudge factor that rates how efficiently a bullet flies. ... This information is a pain to find, but thankfully, the folks at JBM Ballistics have compiled lots of ...Anybody got any views on the output of these two models vs the real world? I have been using JBM for ages and have now got FTE on the iPhone. Results are close but different even on the same input. Drop is about the same but windage is a bit different. Lesson learned, they are models but...The ballistic coefficient is represents the ratio of the drag of the standard (e.g. G1 standard bullet) bullet to that of the bullet you are shooting. A ballistic coefficient of 0.100 means that your bullet has 10 times the drag of the standard bullet. Bullet Length The length of the bullet.There are now hardware solutions with JBM Ballistics solutions so you can have the same accuracy in the field without having to carry a bulky computer. These units solve the equations of motion and do not use approximate methods to find the ballistics solution. For more information, or to ...The ballistic coefficient is represents the ratio of the drag of the standard (e.g. G1 standard bullet) bullet to that of the bullet you are shooting. A ballistic coefficient of 0.100 means that your bullet has 10 times the drag of the standard bullet. Bullet LibraryBallistics calculations and formulas for small arms. Trajectory (Drift) Calculate a trajectory from bullet, velocity, firearm and atmospheric parameters.For any bullet, the drag force must be the same no matter what drag function is chosen since the drag force is physical and depends on the shape of the bullet. This means that the following equation must be true. G (M)/C = G (M)/C. where j is a different drag function than i. This means that it is the ratio of the drag function and ballistic ...BC is the Ballistic Coefficient, a rather important number in the world of bullet flight efficiency. A higher BC means a bullet will retain velocity better - have less negative acceleration, less drag from the air resistance - in similar conditions to a low BC bullet. A low BC means a bullet is going to start slowing down quickly, losing energy ...

This is the new home of JBM's online ballistics resources. Much of this will look familiar to you -- just use the links to the left to find what you're looking for. Ballistics calculations and formulas for small arms.. Arrests.org okaloosa county

jbm ballistic

CO. I think you will find that Applied Ballistics is probably the most well regarded. My personal opinion is that Strelok would be next over the apps you mentioned. Be careful comparing two dissimilar things that appear to be similar. For example I was messing with my Kestrel elite and comparing some data to Strelok+ at 100 yards.The ballistic coefficient is represents the ratio of the drag of the standard (e.g. G1 standard bullet) bullet to that of the bullet you are shooting. A ballistic coefficient of 0.100 means that your bullet has 10 times the drag of the standard bullet. Bullet Length The length of the bullet.JBM Ballistics has partnered with RIANOV to provide integrated ballistics solutions, including the M06 passive ranging calculator, the SOLO calculator and the CSI. The CSI is a new digital angle indicator giving both cant and slope (or cosine of slope). RIANOV™ CSI unit mounted to Remington 700 ...Accuracy Ballistics Gear Reviews Long Range Shooting Marksmanship Precision Rifles Rifle Scopes Sniper Rifles. Featured. Forums. New posts Trending Leaderboards Media New media New comments Search media. Resources. Latest reviews Search resources. Upgrade. HideTV. Donate. Merch. Log in. Register. SearchFor the less eager, there are several approximate methods of calculating the required spin for a bullet. The simplest is the old Greenhill formula: T = 150 / L. where T is the twist in bullet calibers, and L is the length of the bullet in calibers. Unfortunately, it's not a very good method, but I include it here to show that longer bullets ...Buffalo, Wyoming. montanagunslings.com. Feb 8, 2010. #3. Re: ballistic coefficient for Wolf match 40gr. Most 40 grain .22LR bullets have ballistic coefficients between 0.120 and 0.165 with muzzle velocities from 1085 feet per second to 1312 feet per second. Mag 300. Gunny Sergeant.My stay at the Johannesburg Marriott Hotel Melrose Arch exceeded my expectations, and the friendly service from its staff truly delivered. We may be compensated when you click on p...Ballistic's world renowned JBM ballistics engine delivers the gold standard in calculations that other applications compare themselves to. This is the STANDARD Edition. The ADVANCED Edition also includes: - iPhone internal barometer supported. - An advanced head-up display for mounted operation. - Advanced wind kit configurable for up to 8 wind ...The on-line ballistics page can correct for the distance to chronograph. (The velocity lost traveling to the chronograph.) Pressure. The absoluate barometric pressure. …Ballistics calculations and formulas for small arms. Drag Function Conversion. Convert a ballistic coefficient from one drag function to another.The ballistic coefficient is represents the ratio of the drag of the standard (e.g. G1 standard bullet) bullet to that of the bullet you are shooting. A ballistic coefficient of 0.100 means that your bullet has 10 times the drag of the standard bullet. Bullet Length The length of …Trajectory. Calculate a trajectory from bullet, velocity, firearm and atmospheric parameters. Explanation of terms. Ballistics calculations and formulas for small arms.The ballistic coefficient is represents the ratio of the drag of the standard (e.g. G1 standard bullet) bullet to that of the bullet you are shooting. A ballistic coefficient of 0.100 means that your bullet has 10 times the drag of the standard bullet. Barrel Twist The twist length of the barrel. Twist DirectionJBM does not use email addresses for any purpose other than historical. At no time will JBM send SPAM, requests or other information to users that have emailed JBM. Inputs to forms are used to calculate specific information requested by users.There are now hardware solutions with JBM Ballistics solutions so you can have the same accuracy in the field without having to carry a bulky computer. These units solve the equations of motion and do not use approximate methods to find the ballistics solution. For more information, or to ...The BASIC programs were given to me by the late Robert L. McCoy and posted here with his knowledge. He worked at the US Army's Ballistics Research Lab for many years, where he wrote these programs as part of his work. I have made some changes to these programs (with Bob's knowledge) only as necessary to fix bugs.Here is a small ballistic card that a drew up for my SPS Tactical. Its using FGMM 168gr Match ammo, 100yd zero, 2520fps Initail Velocity, 10Mph wind either direction, (so adjust either left or right the required values), 0Mph lead. ... The folks on SC think that the JBM calc is really good and accurate and recommend it to many. I havent used ....

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