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7mm Remington Ultra Magnum Load Data & Ballistics Calculator

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

Maximum average pressure (MAP)65,000 psi
Nominal case capacity108.0 gr H₂O
Groove / bullet diameter0.284 in (7.21 mm)

Example simulation illustrative

Bullet
Hornady 0.284 139 gr GMX
Powder
Alliant RL-22
Charge
74.2 gr
Barrel
26 in

Muzzle velocity

3,151 fps

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

46,172 – 57,897 – 69,637 psi

nominal is 89% of the 65,000 psi maximum average pressure

This sample load runs near the maximum average pressure for the 7mm Remington Ultra Magnum (about 89% 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.

Open the 7mm Remington Ultra Magnum in the MyLoads calculator →

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