Ballistics / Forensics

Ballistics Calculators

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.  JBM Calculators

Need Ballistic Gelatin photo results?




Firearm Tactical Institute  Ballistics, Forensics, Stopping Power, Shootout Analysis

The Stopping Power Home Page  The name says it all

Welcome to!

Personal Defense Ammunition Performance Data

How do bullets fly?   Learn about bullet stability, Yaw

Wind Drift  & Deflection  100 – 200 yards

Tables for 7.62 x 39 and 303 British (click to enlarge)


Tables use 10 mph. For 5 mph multiply by .5, 15 mph 1.5, 30 mph x 3

As you see the 303 out performs the 7.62 in less wind drift.

When Shooting an 8 inch plate at 200 yards wind will matter.


All kinds of testing below

The Box O’ Truth – What you always wanted to know… But were unable to test yourself!

Construction Materials vs bullets

Ballistics and Construction Material Testing

Hi-Point 9mm Analysis & functionality test

Handgun Shooting Measuring your performance

7.62 x 39mm  (SKS Rifle)  1/8 inch Steel – All types penetrated  As shown.  Did not penetrate 3/16 inch steel.

         SKS                                  303c

303 British 1 3/16 plastic



303 British – Penetrates 3/16 steel no problem. The 1/2  Steel made up of 4 plates only penetrated first plate and left a dent of 1 inch.  The bullet Resistant plastic was penetrated and shattered. The plastic is rated for Handgun only.