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
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Firearm Tactical Institute Ballistics, Forensics, Stopping Power, Shootout Analysis
The Stopping Power Home Page The name says it all
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
7.62 x 39mm (SKS Rifle) 1/8 inch Steel – All types penetrated As shown. Did not penetrate 3/16 inch steel.
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.