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JD: What bullets are you interested in, and what data do you have? Using velocity measurements on high power rifles, I have several formulas and spread sheets, but none online. For pistols, I don't know if the rifle formulas as written would work but math is easy to change if we can find it.
12 gru 2020 · This article is going to dive into the most effective ways to quantify the precision of a rifle and ammo particularly when it comes to group sizes and dispersion (i.e. how the bullet holes on target are distributed or spread out).
The automatic matching routine we propose manages to (a) correctly identify land impressions (the surface between two bullet groove impressions) with too much damage to be suitable for comparison, and (b) correctly identify all 10,384 land-to-land matches of the James Hamby study (Hamby, Brundage and Thorpe [AFTE Journal 41. (2009) 99–110]). 1.
Sectional density is easy to calculate because it simply depends on the bullets caliber and weight. For example, the sectional density of a 175 grain .308 caliber bullet is: 175/7000/(.308^2) = 0.264 (the bullet weight is divided by 7000 to convert from grains to pounds).
There are two primary methods available for calculating the ballistic coefficient of your bullets: 1. Using manufacturer-provided data. 2. Calculating BC from scratch using measured data. Method 1: Using Manufacturer-Provided Data. Most ammo manufacturers provide verified ballistic coefficient values for their projectiles.
By Bryan Litz. Abstract. Last month, we identified some basic trends that occur when you scale bullets up and down in caliber. Most of our findings were fundamental and academic. This month, I want to take a close look at some of the practical consequences of scale.
19 lis 2021 · This user-friendly calculator will compute your drops accurately, and output a handy “Cheat Sheet” you can print and attach to your rifle. Here’s how it works. From the Ballistics Calculator Page, first select 4DOF or Standard.
