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7x57R Load Data & Ballistics Calculator

Estimate chamber pressure and muzzle velocity for the 7x57R 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.

7x57R reference

Maximum average pressure (MAP)3,400 BAR
Nominal case capacity59.0 gr H₂O
Groove / bullet diameter0.285 in (7.24 mm)

Example simulation illustrative

Bullet
Hornady 0.284 120 gr V-MAX
Powder
Lovex (Explosia) S062
Charge
43.2 gr
Barrel
23.5 in

Muzzle velocity

2,671 fps

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

34,262 – 42,512 – 51,845 psi

nominal is 86% of the 49,313 psi maximum average pressure

This sample load runs near the maximum average pressure for the 7x57R (about 86% 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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