Estimate chamber pressure and muzzle velocity for the 6.5x50 Japanese Arisaka 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.
| Maximum average pressure (MAP) | 2,950 BAR |
|---|---|
| Nominal case capacity | 48.0 gr H₂O |
| Groove / bullet diameter | 0.261 in (6.63 mm) |
Muzzle velocity
Peak chamber pressure (interval, ±10% burn-rate)
nominal is 78% of the 42,786 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.
Open the 6.5x50 Japanese Arisaka in the MyLoads calculator →