MyLoads — free reloading calculator & internal ballistics simulator

Example simulation — 308 Winchester

illustrative

A sample 308 Winchester starting load, computed by the in-browser internal ballistics engine. Enter your own load above and press Simulate to replace it with your result.

Bullet
Sierra 30 Caliber (.308) 168 gr HPBT MatchKing
Powder
Accurate A-2495
Charge
39.6 gr
Barrel
24 in
Muzzle velocity2,466 fps
Peak chamber pressure (interval, ±10% burn rate)36,159 – 45,413 – 55,762 psinominal is 73% of the 62,000 psi maximum average pressure (MAP)

The simulator isn't optimized for this cartridge yet and may read pressure high.

Illustrative example — every figure is an estimate; always confirm your load against a current published manual before loading.