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7mm Remington Magnum Load Data & Ballistics Calculator

Estimate chamber pressure and muzzle velocity for the 7mm Remington Magnum 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.

7mm Remington Magnum reference

Maximum average pressure (MAP)61,000 psi
Nominal case capacity82.5 gr H₂O
Groove / bullet diameter0.284 in (7.21 mm)

Example simulation illustrative

Bullet
Hornady 0.284 139 gr GMX
Powder
IMR 4350
Charge
59.6 gr
Barrel
24 in

Muzzle velocity

3,063 fps

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

45,283 – 57,486 – 71,622 psi

nominal is 94% of the 61,000 psi maximum average pressure

This sample load runs near the maximum average pressure for the 7mm Remington Magnum (about 94% 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 is an estimate; always confirm your load against a current published manual before loading.

Use MyLoads as a 7mm Remington Magnum velocity and pressure calculator: it estimates muzzle velocity, muzzle energy and the full chamber-pressure curve for your own powder, charge and barrel length, compared against the reference facts above.

Open the 7mm Remington Magnum in the MyLoads calculator →

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