Jmb ballistics

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. …

Jmb ballistics. JBM Ballistics (JBM), based in Las Cruces, NM, has provided free online ballistics info for the past 15 years. JBM Ballistics’ sophisticated algorithms deliver …

Sniper's Hide is a community of Snipers of all kinds, focusing on long range shooting, accuracy, and ballistics. Founded by Frank Galli in 2000, Sniper's Hide has been offering informational videos, podcasts, and other support to its users in one location. Forum Statistics. Threads. 473,151.

JBM is a free online provider for ballistics calculators. To determine the ballistic coefficient, the trajectory predicted with a given muzzle velocity (feet per second) needed to be calculated first. In determining the velocity at 200 yards the atmospheric conditions of altitude (ft.), humidity (%),Sniper's Hide is a community of Snipers of all kinds, focusing on long range shooting, accuracy, and ballistics. Founded by Frank Galli in 2000, Sniper's Hide has been offering informational videos, podcasts, and other support to its users in one location. Forum Statistics. Threads. 471,952.The G7 Ballistic Coefficient is the future of BCs, For centuries now, science has been helping us gain a more accurate understanding of our world. The branch of science we care about as shooters is known as ballistics. ... JBM's page also has links to free ballistics programs that can be downloaded and run on your computer when not connected ...Descriptions % Percentage 1 ELD M (Extremely Low Drag Match) 10.3 2 HPBT MatchKing™ 7.6 3 MatchKing™ (Litz) 4.5 4 ELD-X (Extremely Low Drag - eXpanding)Ballistic Coefficient (Velocity) Calculate a ballistic coefficient from near velocity, far velocity and distance between velocity measurement points. Ballistic coefficient is calculated for input drag function. Explanation of terms. Near Velocity (500.0 to 4800.0 ft/s) [3000.0] [?] ft/s m/s. Far Velocity (500.0 to 4800.0 ft/s) [2900.0] [?]Size & 22LR Ballistics. The 22 LR is a tiny round at only 1" long. Its low power means it gets by with a very thin brass shell casing, a contributing factor to its nice price tag. Such a thin casing enables a rimfire primer, which is struck through the brass by the firing pin. Still, the 22 LR's muzzle velocity is nothing to scoff at.2970 muzzle energy. Barrel 24 inch, 1/10 twist. 1.5 scope height. Sight in elevation 2100ft. Hunting elevation 7500ft. They both return reasonably good results but are off .75moa at 200 and it grows from there. I know there is massive amount of other settings but they are both set up the same and are pretty different, especially beyond 400 yards.

Ballistic Calculators & Field Results. Sniper's Hide is a community of Snipers of all kinds, focusing on long range shooting, accuracy, and ballistics. Founded by Frank Galli in 2000, Sniper's Hide has been offering informational videos, podcasts, and other support to its users in one location. Forum Statistics.Calculate Power Factor from muzzle velocity, bullet diameter and bullet weight. Divisions for TSA, IDPA, IPSC, USPSA and SASS are displayed. SASS has a maximum velocity that is taken into account. Explanation of terms. Bullet Weight (5.0 to 15000.0 gr) [115.0] [?] gr gm. Caliber (0.100 to 2.000 in) [0.355] [?]Power Factor Input Data Bullet Weight Weight of the bullet. Caliber Diameter of the bullet Muzzle Velocity The velocity of the bullet as either (1) measured at some distance from the muzzle (see applicable rule book for measuring methods)Advanced Marksmanship Unit. Ballistic Calculators & Field Results. Sniper's Hide is a community of Snipers of all kinds, focusing on long range shooting, accuracy, and ballistics. Founded by Frank Galli in 2000, Sniper's Hide has been offering informational videos, podcasts, and other support to its users in one location. Forum Statistics.The VL3 is free of flutter until 450 km/h TAS. The VNE is limited to 340 km/h IAS. The VNO is 280 km/h IAS. To increase your safety the VL3 can be equipped with a TCAS (Traffic alert and Collision Avoidance).

4852 posts · Joined 2012. #3 · Sep 18, 2015. Second best is to use a chronograph, zero your rifle using the factory ammo of choice while recording speeds and use a large sample size so the average is really representative of the ammo. Armed with the the average speed, BC of your bullets, height of the scope center above bore center, go to JBM ...External ballistics. This schlieren image of a bullet travelling in free-flight demonstrates the air-pressure dynamics surrounding the bullet. External ballistics or exterior ballistics is the part of ballistics that deals with the behavior of a projectile in flight. The projectile may be powered or un-powered, guided or unguided, spin or fin ...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.Ballistics calculations and formulas for small arms. Trajectory μCard - Wind Only. Calculate a windage card from bullet, velocity, firearm and atmospheric parameters.The constant 32.2 is the acceleration due to gravity, g, and is used to convert weight to mass: Mass = Weight/g. The free recoil velocity can now be found. V F = (0.000745 slugs * 2700 f/s + 0.000177 slugs * 4700 f/s)/ (0.217 slugs) = 13.1 f/s. And the free recoil energy is given by. E F = 0.5 * 0.217 slugs * (13.1 f/s) 2 = 18.6 ft•lbs.Magnum Research Ammunition Ballistics: Round Type Weight Muzzle Energy ft·lb Muzzle Velocity ft/sec. 44 Magnum: XTP JHP: 240: TBD: TBD: Masafe Ammunition Ballistics: Round Type Weight Muzzle Energy ft·lb Muzzle Velocity ft/sec. 44 Magnum: Defender: 117: 998: 1960: 44 Magnum: Swat: 55: 760: 2500: Magtech Ammunition Ballistics: Shop Now: Round ...

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4852 posts · Joined 2012. #3 · Sep 18, 2015. Second best is to use a chronograph, zero your rifle using the factory ammo of choice while recording speeds and use a large sample size so the average is really representative of the ammo. Armed with the the average speed, BC of your bullets, height of the scope center above bore center, go to JBM ...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 range ...920.0 gr. 0.268. Ballistics database of popular sporting bullets - including ballistic coefficients, weights, form factors, and other data.Since not everyone has a pressure measuring device, some ballistics calculators (like the popular JBM Ballistics) let you input corrected pressure and an altitude so that it can convert the corrected pressure to an absolute pressure. I don't recommend doing this. First, because a corrected pressure from an airport nearby will always be less ...

Ballistics calculations and formulas for small arms. Trajectory. Calculate a trajectory from bullet, velocity, firearm and atmospheric parameters.The latest research on Golf Performance Metrics Outcomes. Expert analysis on potential benefits, dosage, side effects, and more. Golf performance refers to the ability to execute t...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.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 ...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.Descriptions % Percentage 1 ELD M (Extremely Low Drag Match) 10.3 2 HPBT MatchKing™ 7.6 3 MatchKing™ (Litz) 4.5 4 ELD-X (Extremely Low Drag - eXpanding)This book, among other things, includes software and experimentally measured ballistic coefficients for 175 bullets. The bullets have been added to the JBM Bullet Library using the G7 drag function bullets measured by Bryan are denoted by " (Litz)" in the description. The G7 coefficients should give better calculations than the G1 coefficients ...The .300 Winchester Magnum (also known as .300 Win Mag or .300 WM) (7.62×67mmB, 7.62x66BR) is a belted, bottlenecked magnum rifle cartridge that was introduced by the Winchester Repeating Arms Company in 1963. The .300 Winchester Magnum is a magnum cartridge designed to fit in a standard rifle action. It is based on the .375 H&H Magnum, which has been blown out, shortened, and necked down to ...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] [?]Ballistic Coefficient (Velocity) Calculate a ballistic coefficient from near velocity, far velocity and distance between velocity measurement points. Ballistic coefficient is calculated for input drag function.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.

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 ...

Please share, like, and tweet this page and others to show your support. Our calculator creates a proper ballistics trajectory chart that details range, drop, velocity, energy (fps), wind drift, and time. It takes into effect things like atmospheric conditions, wind, and even allows you to make projections shooting both up and down hill.JBM ballistics Stability calculator with 11.5" twist: 0.48" bullet 1050fps Stability 2.491 0.46" bullet 1050fps Stability 2.786 0.48" bullet 1020fps: ... Bryan's Applied Ballistics team measures the bullet lengths so you are in luck. They are available to public through Kestrel ballistics app.Jbm Ballistics Data Jbm Ballistics Data. By BigDave November 17, 2006 in Rifle/Shotgun. Share More sharing options... Followers 0. Recommended Posts. BigDave. Posted November 17, 2006.The angle of the tilt of the firearm to the right or left from vertical. Positive angles are to the right. Distance to Chronograph. The distance from the muzzle of the firearm to the chronograph used for muzzle velocity measurements. If the muzzle velocity is estimated, enter 0.0 for this value -- no correction.JBM has been providing free online ballistics calculators and info for approximately fifteen years. During that time JBM has written custom ballistics software for a number of different platforms including desktop workstations and embedded processors and microcontrollers. If there is something you think we can do for you, please don't hesitate ...Ballistics calculations and formulas for small arms. Drag/Twist. Calculate drag and stability from bullet dimensions, weight, specific gravity and barrel twist.The 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 ...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] [?]

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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.Welcome. Welcome to ShootersCalculator.com. This site is dedicated to helping shooters with their various ballistic calculations by offering free online ballistic calculators and providing ballistic theory on how to do and apply the calculations. We hope that you find the information and calculators on this website useful.JBM BALLISTICS. 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 …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 ...More about Ballistic Advanced JBM Ballistics Calculator. Ballistic Advanced JBM Ballistics Calculator is available for users with the operating system iOS 7.0 or later, and it is available in English. The program version is 6.2.3 and it has been updated on 2/08/2017.Since we added this app to our catalog in 2017, it has already achieved 1 ...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 700The 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.Trajectory. Calculate a trajectory from bullet, velocity, firearm and atmospheric parameters. Explanation of terms. Library (Select bullet or enter BC and Weight below.) [?]Ballistics calculations and formulas for small arms. Drag/Twist. Calculate drag and stability from bullet dimensions, weight, specific gravity and barrel twist.The ballistic calculator will provide all the variables of your shot at a provided range. To use the calculator, simply fill in the input values (blank white boxes) in the large black box. By default, we only need four values to give you a good idea of how your shot will behave: target range, bullet weight, muzzle velocity, and ballistic ...The angle of the tilt of the firearm to the right or left from vertical. Positive angles are to the right. Distance to Chronograph. The distance from the muzzle of the firearm to the chronograph used for muzzle velocity measurements. If the muzzle velocity is estimated, enter 0.0 for this value -- no correction. ….

The ballistic coefficient for the bullet being used. It is almost always obtained from the manufacturer, but can also be measured. 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.What to look for The best bags are made of high-quality nylon (ballistic or Cordura), which resists tears while providing give. Another sign of quality:… By clicking "TRY IT...Milliner, is among the world's greatest ballistic engines in existence. Used the contest shooters, hunters, and the service, this powerful ballistics archive delivers precision outcomes. The JBM engine also adds latest features similar as speeds accommodation for chronograph , perfect point blank range, up-wind (z-wind) correction, and midrange ...Ballistics calculations and formulas for small arms. All content and logos © 2010-2013, JBM Ballistics, LLCI've found them listed in one book, Ballistics of the Future (see below), and have listed them here for anybody that does not have access to this book (only fourth order was shown). For two equations, dy/dx = F(x, y, z) and dz/dx = G(x, y, z), a single integration step of h is defined by:Ballistics calculations and formulas for small arms. Drag/Twist. Calculate drag and stability from bullet dimensions, weight, specific gravity and barrel twist.JBM Ballistics App Questions. Thread starter Tesoro; Start date Aug 17, 2023; Tesoro Non-compliant. Gold $$ Contributor. Aug 17, 2023 #1 I use the Ballistics app exclusively. The other day I was shooting 6mm 103gr at 1k and wondered how the trajectory would change with an off weightl bullet. So I put in 102.5 g and the trajectory was the same.The twist rate (inches per turn) of the barrel. This value is used to calculate stability. It should not be confused with the required twist calculated by Bullet Drag. The diameter of the base of the bullet. For boattails, this is smaller than the caliber. The length of the boattail from the rear of the bearing surface to the base of the bullet.The GNU Ballistics Library is a C library to solve exterior ballistics problems through numerical integration. It is a lightweight, optimized library for general purpose ballistics solutions. In general, it is targeted at small arms exterior ballistics at ranges under 50,000 yards. This library supports the standard Drag Functions: G1, G2, G3 ...Ballistics calculations and formulas for small arms. Drag Function Conversion. Convert a ballistic coefficient from one drag function to another. Jmb ballistics, Ballistic based their app on the JBM calculator, which is the recognized highest standard among ballistics computers, but Ballistic itself is a company entirely independent of JBM Ballistics. Competitors can input projectile characteristics from that large Ballistic library, and create custom data from their own handloads. ..., 6mmBR.com is the best guide for 6mm BR Benchrest precision shooting, complete with 6BR FAQ, Reloading Data, Shooter Message Boards, Reader Polls, and Photo Gallery. Match event calendar and rifle competition accuracy training tips. Equipment reviews (.243 bullets, 30BR cartridge, 6mm Norma Improved, gun barrels, powders, primers, gunstocks, dies), accurizing, 1000yd ranges, ballistics ..., Ballistics calculations and formulas for small arms. Trajectory. Calculate a trajectory from bullet, velocity, firearm and atmospheric parameters., Ballistic Coefficient (Velocity) Calculate a ballistic coefficient from near velocity, far velocity and distance between velocity measurement points. Ballistic coefficient is calculated for input drag function., Ballistic Coefficient: 0.5 Bullet Weight: 220 grains Caliber: 0.308 Muzzle Velocity: 2500 f/s; Sight Height: 1.5 in LOS Angle: 0 deg Cant Angle: 0 deg Wind Speed: 10.0 mph Target Speed: 10.0 mph Minimum Range: 0 Maximum Range: 1000 yd Range Increment:, All of the JBM trajectory calculators allow the user to select the drop, windage and lead (if applicable) units. Drop units are either a length such as inches or centimeters or an angle such as milliradians (mils), inches/100 yards, cm/100 meters, etc. The length is a user input value., Below is a trajectory table to illustrate a MPBR zero. The example used is a .22-250, shooting a 50 gr. Vmax at 3700 fps. A typical example of a fairly flat shooting factory rifle. This table was calculated using the JBM calculator linked above. The MPBR for the above example is 284 yards, with a 246 yard zero., Bullet Lengths I am in the process of adding bullet lengths to the library so that the drift can be easily calculated. Since I cannot afford a box of every type of bullet to measure them, I am asking for your help to populate the length values., 08-Nov-2019 ... Attempting To Hit Geoff Castellucci's Low Notes Using Second Subharmonics | G1 - F1. JMB Music•37K views ... Kentucky Ballistics New 938K views., Very entertaining read. I re-ran your calculations on both shooterscalculator AND JBM Ballistics. I used 200 gr, .400 diameter, and a G1 BC of 0.199 per Underwood Ammo on their 200gr loading. Interestingly, I couldn't replicate your trajectory until I raised the muzzle velocity to 3200 fps. Just FYI. I still carry my Glock 40 in black bear woods., ‎Get Ballistic Standard Edition Today!!! "I shoot on Team Louisiana Precision Rifles in Tactical rifle matches. Everyone on the team that uses Ballistic has had great results. This program has really been a game changer in the precision rifle world." - Bannon (Louisiana) "Great app. Helped me prepa…, The JBM IDPA classifier application is a simple application for IDPA classifier practice. It allows the user to enter classifier times and points down and calculates the current classification. It includes the abbreviated classifer, the standard classifier and the pistol caliber carbine classifier., A modified (modified by R. L. McCoy) version of M. A. Morris' RARDLIFT code with corrections for small arms bullets and medium caliber cannon projectiles. Provides interim estimates of lift, overturning moment and yaw drag coefficients. Inputs are very similar to McDrag (above) but it does require the center of gravity location., Bullet Lengths I am in the process of adding bullet lengths to the library so that the drift can be easily calculated. Since I cannot afford a box of every type of bullet to measure them, I am asking for your help to populate the length values., The angle of the tilt of the firearm to the right or left from vertical. Positive angles are to the right. Distance to Chronograph. The distance from the muzzle of the firearm to the chronograph used for muzzle velocity measurements. If the muzzle velocity is estimated, enter 0.0 for this value -- no correction., K D and C D. In terms of the newer ballistic nomenclature, C D, we may rewrite K D as. C D = 8/π K D. so that the the equation for G is. G (m) = π/8 C D (m) p 0 | v |. The acceleration of the bullet, due to drag, in terms of C D is. aD = -p π/8 C D (m)/C | v | v. NOTE: that in the preceding equation, the C D is that of the "standard" bullet ..., JBM Ballistics’ sophisticated algorithms deliver extremely reliable ballistics solutions. To complement its software, JBM plans to introduce a new hardware product: the BallistiComp. Laster this year, JBM will unveil its new BallistiComp, a portable handheld ballistics computer that measures atmospheric temperature and pressure. Once your …, Using some of the calculators on the JMB Ballistics web page I was able to put a list together that matched Bullet length with BC for common .30 Cal bullets. View attachment bullet data.xls Basically what I found is that most bullets listed can be stabilized with a 1 in 12 barrel like mine. Here is a link to JMB Ballistics:, This was JMB's first handgun cartridge and was designed for a blowback compact pistol design but has since been implemented in locked breech designed handguns., 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 ..., 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., Compare these ballistic calculator outputs, particularly the "Maximum PBR" range in the first column. The first is with a 20″ barrel firing M193 at 3300 FPS, the second is a 16″ barrel at 3100 FPS, and the third is a 12.5″ barrel at 2900 FPS. These represent my three favorite barrel lengths for an AR-15., Magnum Research Ammunition Ballistics: Round Type Weight Muzzle Energy ft·lb Muzzle Velocity ft/sec. 44 Magnum: XTP JHP: 240: TBD: TBD: Masafe Ammunition Ballistics: Round Type Weight Muzzle Energy ft·lb Muzzle Velocity ft/sec. 44 Magnum: Defender: 117: 998: 1960: 44 Magnum: Swat: 55: 760: 2500: Magtech Ammunition Ballistics: Shop Now: Round ..., Ballistic 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., Advanced Marksmanship Unit. Practical Marksmanship Questions. Sniper's Hide is a community of Snipers of all kinds, focusing on long range shooting, accuracy, and ballistics. Founded by Frank Galli in 2000, Sniper's Hide has been offering informational videos, podcasts, and other support to its users in one location., I was looking at my ballistics charts at both JMB.com and G7.com. These two places show different numbers for my charts. I was wondering if anyone has had any experience with either of these places and which one do you guys think is more accurate. Thanks., JBM has numbers change for sight offset but they don't give you the numbers for actually zeroing it up at 100 yards (Instead of the expected 0 elevation, 0 windage @ 100 yards, it shows 0 elevation, 9.5 MOA windage). H4DOF and Ballistics AE don't have sight offset as an option. I understand that practically, any offset induced by canting the ..., Dandao Xuebao/Journal of Ballistics. Dandao Xuebao, also known as the Journal of Ballistics, is a leading scholarly publication dedicated to advancing the field of ballistics through high-quality research and academic discourse. Our journal has been a cornerstone in promoting knowledge exchange and fostering innovation in the dynamic realm of ..., 5.11 Field Ops Ballistic Watch. 5.11 has partnered with Horus Vision to bring their software, usually installed on a handheld PDA device, into a watch platform. Months of development and field testing ensure that the software works with equal precision in a watch format. Popular among police snipers, long range tactical shooters and big game ..., The height of the sight (or scope) above or below from the centerline of the barrel. This is required because the bullet starts at a drop of - [Sight Height]. The offset of the sight (or scope) to the left or right of the centerline of the barrel. A temperature used to calculate a muzzle velocity for output., 16-Feb-2024 ... ... JMB along the way that show the progression of our favorite handgun. The 1911's development started in 1896, with Browning filing four ..., Jochem Peelen, Books on Demand, GmbH, 22848 Norderstedt, Germany, 2006. ISBN10 3-8334-6697-9, ISBN13 978-3-8334-6697-7. A very nice book on common and uncommon drag functions. Book includes printout of computer code to model drag functions and choose drag function for a bullet. A must have for anybody interested in exterior ballistics., JBM Ballistics "Trajectory" calculator (not the "simplified" version). You'll need to play with your numbers and find the best "Maximum Point Blank Range." That calculator will allow you to input your vitals diameter (5", 7", whatever). Check the block that says "Zero at Maximum PBR" so that data gets included in the output chart.