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35 Whelen Load Data & Ballistics Calculator

Estimate chamber pressure and muzzle velocity for the 35 Whelen 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.

35 Whelen reference

Maximum average pressure (MAP)62,000 psi
Nominal case capacity72.0 gr H₂O
Groove / bullet diameter0.358 in (9.09 mm)

Example simulation illustrative

Bullet
Hornady 0.358 200 gr FTX
Powder
IMR 4064
Charge
51.5 gr
Barrel
22 in

Muzzle velocity

2,311 fps

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

27,494 – 33,244 – 39,616 psi

nominal is 54% of the 62,000 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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