Jbm ballistic - 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 ...

 
JBM is working on some iOS applications including a ballistics calculator. There are currently no plans to support Android systems. IDPA Classifier A simple iOS application for entering and tracking IDPA classifier progress.. Masterbuilt 560 error 4

Integrating this equation is much easier when trajectory parameters are required as a function of range. [This vector equation for velocity is derived in the discussion of CD and KD] But, it does introduce another differential equation for time. Simultaneous Equations of First OrderIf you've set your New Year's resolutions but also live with OCD, you might find magical thinking takes the lead. Here's how I manage. It’s becoming more difficult for me to approa...Many free online ballistic calculators and smartphone apps allow users to select G1 or G7 BCs to figure drop and wind drift of their bullet. Berger Bullets' calculator permits selecting G1 or G7-based BCs. Those at Gundata.org and JBM Ballistics go even further in allowing selection of G1, G2, G5, G6, G7 and G8 standard projectiles.3DF (degrees of freedom) model that is used in this calculator is rooted in old C sources of version 2 of the public version of the JBM calculator, ported to C#, optimized, fixed, and extended with elements described in Litz's "Applied Ballistics" book and ideas of the friendly project by Alexandre Trofimov.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, thenJBM 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.Ballistics calculations and formulas for small arms. Recoil A list of variables are at the bottom of this page.. Recoil Velocity The forward momentum (sometimes written as impulse), that of the bullet and powder charge are given byBallistics calculations and formulas for small arms. Drag Function Conversion. Convert a ballistic coefficient from one drag function to another.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 ...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 ...Ballistic Coefficient The calculated ballistic coefficient for the selected drag function. Atmospheric Density The calculated density of the air. Speed of Sound The calculated speed of sound. Time The calculated time of flight of the bullet over the entered distance.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.Ballistic Tip™ Spitzer 2.2 9 V-Max™ 1.9 10 Match Hunting VLD 1.8 11 A-Tip™ Match 1.7 12 Accubond Long Range Spitzer (G7) 1.5 13 Tipped Triple-Shock™ X Boattail 1.4 14 Long Range Hybrid Target 1.4 15 Long Range X Boattail 1.3 16 Accubond™ Spitzer 1.3 17 EOL Elite Hunter 1.1 18 Tipped MatchKing™ 1.0 19 Scenar 1.0 20 CX™ 1.0 #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 ...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 drag function to use to calculate the ballistic coefficients. Most commercial bullets use the G1, but for some long range bullets, the G7 or G8 is typically a better choice. Some military bullets fit the G5 and G6 functions better than the G1.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. Notes (displayed at top of printout) [?]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 distance from the point of the first velocity measurement to the point of the second measurement. This is the distance between the two chronographs. Drag function. A 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 ...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 calculations and formulas for small arms. Power Factor. The JBM Power Factor application is an simple application for calculating IDPA, SASS and USPSA power factors and divisions.Trajectory μCard - Wind Only. Calculate a windage 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 termsThe 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 LibraryTrajectory (Simplified) Calculate a trajectory from bullet, velocity, firearm and atmospheric parameters. Explanation of terms. Library (Select bullet or enter BC and Weight below.) [?]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. Data EntryApplied 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.Ballistics calculations and formulas for small arms. Recoil. Calculate recoil from muzzle velocity and bullet, powder and rifle weight.Speedy weight loss is the first sign a person may have gastritis. Usually, such person eats the same amount of food and the same quality, but the outcome is the same: continuous lo...Many free online ballistic calculators and smartphone apps allow users to select G1 or G7 BCs to figure drop and wind drift of their bullet. Berger Bullets' calculator permits selecting G1 or G7-based BCs. Those at Gundata.org and JBM Ballistics go even further in allowing selection of G1, G2, G5, G6, G7 and G8 standard projectiles.JBM Ballistics; Ballistic - Ballistic is the leading ballistics trajectory calculator for the iPhone. Ballistic calculates trajectory, windage, velocity, energy, and bullet flight time for any valid range, and can compensate for atmospheric conditions such as temperature, barometric pressure, humidity, and altitude.[Ultimate Resource]: Ammunition Reviews. 8 Best Ballistic Calculator Apps. iSnipe App. Ballistic calculators are a must for long-range shooters and anyone looking …Ballistics calculations and formulas for small arms. Trajectory (Simplified) Calculate a trajectory from bullet, velocity, firearm and atmospheric parameters.Ballistic's world renowned JBM ballistics engine delivers the gold standard in calculations that other applications compare themselves to. This is the STANDARD Edition.Jun 23, 2022 · To make one, first generate a come-up table, using one of the free online ballistics programs such as JBM Ballistics. You can also put the info in an Excel spreadsheet or MS Word table and print it out. Above is a sample of a data card. For each distance, the card includes drop in inches, drop in MOA, drop in Mils. Applied Ballistics, enter the inputs correctly and you will have no problems. 2 seasons ago in Montana a couple of my buddies were making first round hits at 900 on some rocks about the size of a coffee can, we also had their info entered properly and a couple practice trips to the range before the hunt to verify everything.100 rem additional required inputs are: 110 rem muzzle velocity (ft/sec); ballistic coefficient (lb/in 2); 120 rem height of sight line above bore centerline (inches); 130 rem gun elevation angle (minutes); ratio air density to 140 rem standard density; air temperature (deg f); range print 150 rem interval (yards/meters); range to terminate ... 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] [?] The velocity at which the ballistic coefficient entered above is defined. If you only have one BC and no velocity information, use the average of the muzzle velocity and terminal velocity so that you get a new ballistic coefficient representative of the …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] [?]4. Applied Ballistics. The Applied Ballistics mobile app is certainly my favorite ballistics calculator application for Android and iOS. Yes, it’s expensive, costing $30, but in my experience, no other ballistics calculator comes close to the functionality you get with this application. Applied Ballistics App.Used for sectional density and form factor calculation. Drag Function. The drag function for the enter ballistic coefficient. Velocity. The velocity at which the ballistic coefficient entered above is defined. If you only have one BC and no velocity information, use the average of the muzzle velocity and terminal velocity so that you get a new ...[Ultimate Resource]: Ammunition Reviews. 8 Best Ballistic Calculator Apps. iSnipe App. Ballistic calculators are a must for long-range shooters and anyone looking …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.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 …Ballistics are a complex interaction of factors including the load, rifle, altitude and weather. No one formula can do it all. Before you begin to think about either of these things, it would serve you well to learn to do range estimations with a pen and paper and use something like JBM ballistics (also discussed elsewhere) to build some ...A perfect example includes the classic .223 Remington, 5.56×45 NATO, or .223 Wylde-chambered barrel designs. While 1:7 twist is the "mil-spec" standard, most manufacturers planning on optimizing their twist rate for a wide range of commercial bullet designs will gravitate toward a .223 Wylde chamber with a 1:8 twist rate.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.The JBM ballistics calculator says otherwise. What other cartridges are flat shooters out to 1000? Eric - Wanna Be Long Range Shooter Rem 700 SS 5R Milspec .308 w/Leupold Mark 4 6.5-20x50mm Rem 700 SCBB2 .308 w/Burris Fullfield 2 Tactical 6.5-20x50mm. Save Share. Like. Sort by Oldest firstThe 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.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 ...A perfect example includes the classic .223 Remington, 5.56×45 NATO, or .223 Wylde-chambered barrel designs. While 1:7 twist is the "mil-spec" standard, most manufacturers planning on optimizing their twist rate for a wide range of commercial bullet designs will gravitate toward a .223 Wylde chamber with a 1:8 twist rate.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. 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 1.1 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 ...I noted in my web page on making Density Altitude ballistic cards that JBM Ballistics would not accept a DA input below -1000 feet. Making Ballistic Cards Using Density Altitude I dropped the author of that program a note this morning, requesting that he consider reducing that minimum DA, as...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! 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. 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. iPad-Specific Features: 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 ...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 ...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. SearchTrajectory 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.I was under the impression that in order to calculate a bullet's ballistic coefficient, one had three choices: a) Muzzle velocity compared to and calculated against some "meaningful" downrange velocity b) "Point of Impact" Method c) Doppler Radar (a variation I assume of a), above) Now, it...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.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 ...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 Wind Kit uses the JBM ballistic engine's wind capabilities to allow shooters to account for nearly any possible wind situation. In fact, the wind kit allows users to quickly program the most complex wind scenarios. Most ballistic applications provide only calculations for a constant wind for the full shooting distance, such as ...The drag function to use to calculate the ballistic coefficients. Most commercial bullets use the G1, but for some long range bullets, the G7 or G8 is typically a better choice. Some military bullets fit the G5 and G6 functions better than the G1.This is done by measuring the drag of the standard bullet. This standard bullet has a ballistic coefficient (BC) of 1.0. Other bullets of the same shape but different size have different ballistic coefficients. The drag function and BC are then used to calculate the drag coefficient and therefore the drag on a bullet of similar shape to the ...Ballistics calculations and formulas for small arms. Drag Function Conversion. Convert a ballistic coefficient from one drag function to another.Ballistics calculations and formulas for small arms. Stability. Calculate a stability factor for a bullet using the Miller stability formula.A perfect example includes the classic .223 Remington, 5.56×45 NATO, or .223 Wylde-chambered barrel designs. While 1:7 twist is the "mil-spec" standard, most manufacturers planning on optimizing their twist rate for a wide range of commercial bullet designs will gravitate toward a .223 Wylde chamber with a 1:8 twist rate.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.53. 0. 38. Dec 16, 2010. #1. So i was just checking out a few ballistic tables of the 300, and it showed the 165 gr. nosler had the greatest energy, velocity, and less drop at 500 yards then any of the other bullets on the list. Seems like everyone shoots the 180.Trajectory of Bullet fired at Sea Level. Trajectory of Bullet fired at 20,000 feet. You can do your own experimental calculations using JBM Online Ballistics (free to use). Here is an extreme example, with two printouts (generated with Point Blank software), one showing bullet trajectory at sea level (0′ altitude) and one at 20,000 feet.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...General Trajectory Calculators Trajectory Calculates the trajectory from bullet BC and firearm info. Inputs include muzzle velocity, sight heights, chronograph distance, ballistic coefficient, drag function, line of sight and cant angles and atmospheric conditions.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 / iJust a quick review. Recently used it to create some data cards. Excellent tool, very user friendly. Selected the off-the-shelf Sierra data for the 30 cal. 175 MatchKing 300 yard zero with 2750 ft/s MV. Calculator stated 15.9 MOA drop to 750 yards and 23.3 MOA drop to 900 yards. Set up LV...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 possible. With Ballistic, you'll be able to make the most accurate calculations for every shot, everywhere, even in areas with no cellular coverage.Obtaining and storing that data is made easier with the Ballistic App, which is now available in three flavors for iOS devices. Whether using the BallisticStandard, Ballistic Advanced or BallisticiPad editions, the Ballistic App uses the proven JBM Ballistics engine for precise calculations, along with a ballistic library containing more than ...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 LibraryAbout. 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 ...Ballistics calculations and formulas for small arms. Trajectory (Simplified) Calculate a trajectory from bullet, velocity, firearm and atmospheric parameters.of trajectory lines in output) 3400 n2 = n - 1 3410 print 3420 print 3430 print "do you want hard copy of this output?" 3440 print "enter y for yes, n for no:"; 3450 input k1$ 3460 if k1$ = "n" then 3880 3470 if k1$ = "y" then 3490 3480 goto 3420 3490 rem echo input drag coefficient table. 3500 lprint 3510 lprint "drag function: "; k$ 3520 ...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.

Ballistic Coefficient (Time) Calculate a ballistic coefficient from initial velocity, time of flight and distance. Calculuated ballistic coefficient is displayed for selected drag function. Explanation of terms. Raquel welch surgery

jbm ballistic

JBM will be my new go to for all my ballistic calculation needs. Kopfjager1 Supporter. Supporter. Full Member. Minuteman. Feb 12, 2017 596 262. Oct 4, 2018 #3 ; Yeah with AB, my MV has to be calibrated through the app. Thats including turning off Aerodynamic Jump, Spin Drift, etc. However with my 308 its perfect.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 ...Liz Forkin Bohannon joins Barry Moltz on the latest episode of Small Business Radio Show. She explains how passion is not a pre-existing condition. There’s no lack of people tellin...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.JBM is working on some iOS applications including a ballistics calculator. There are currently no plans to support Android systems. IDPA Classifier A simple iOS application for entering and tracking IDPA classifier progress.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).Black Rifle Cartridge Comparison Guide is the ultimate hunting & ballistics source, built to help black rifle/MSR shooters maximize cartridge capabilities and ballistic understanding. The Black Rifle CCG is written specifically for Modern Sporting Rifle and Semi-Automatic Rifle users. The Black Rifle CCG considers every major factory and hand-load source for every Rifle, Shotgun and Handgun ...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.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.A 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. 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. Liz Forkin Bohannon joins Barry Moltz on the latest episode of Small Business Radio Show. She explains how passion is not a pre-existing condition. There’s no lack of people tellin....

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