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6mm ARC Load Data & Ballistics Calculator

Estimate chamber pressure and muzzle velocity for the 6mm ARC with the free, in-browser MyLoads internal-ballistics simulator. The figures below are illustrative estimates from a physics model — not a recommended recipe. Always cross-check a current published loading manual.

6mm ARC reference

Maximum average pressure (MAP)52,000 psi
Nominal case capacity35.0 gr H₂O
Groove / bullet diameter0.243 in (6.17 mm)

Example simulation illustrative

Bullet
Sierra 6mm 243 Caliber (.243) 107 gr HPBT-CN MatchKing
Powder
Winchester StaBALL 6.5
Charge
27.2 gr
Barrel
24 in

Muzzle velocity

2,295 fps

Peak chamber pressure (interval, ±10% burn-rate)

23,089 – 32,415 – 43,842 psi

nominal is 62% of the 52,000 psi maximum average pressure

Illustrative example — every figure here is an estimate and can be wrong. Always consult a current published loading manual, and never trust these numbers on their own.

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