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7x65R Load Data & Ballistics Calculator

Estimate chamber pressure and muzzle velocity for the 7x65R 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.

7x65R reference

Maximum average pressure (MAP)3,800 BAR
Nominal case capacity69.4 gr H₂O
Groove / bullet diameter0.285 in (7.24 mm)

Example simulation illustrative

Bullet
Hornady 0.284 139 gr GMX
Powder
Hodgdon Superformance
Charge
50.4 gr
Barrel
24 in

Muzzle velocity

2,780 fps

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

31,903 – 43,454 – 57,247 psi

nominal is 79% of the 55,114 psi maximum average pressure

This sample load runs near the maximum average pressure for the 7x65R (about 79% of MAP at the nominal estimate; the upper interval can exceed it). It is shown only to illustrate the simulator — reduce the charge and work up from your manual's start load.

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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