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6.5x47 Lapua Load Data & Ballistics Calculator

Estimate chamber pressure and muzzle velocity for the 6.5x47 Lapua 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.

6.5x47 Lapua reference

Maximum average pressure (MAP)63,100 psi
Nominal case capacity40.1 gr H₂O
Groove / bullet diameter0.264 in (6.71 mm)

Example simulation illustrative

Bullet
Sierra 6.5mm 264 Caliber (.264) 107 gr HPBT MatchKing
Powder
Ramshot Big Game
Charge
39.6 gr
Barrel
30 in

Muzzle velocity

3,081 fps

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

40,585 – 57,667 – 78,659 psi

nominal is 91% of the 63,100 psi maximum average pressure

This sample load runs near the maximum average pressure for the 6.5x47 Lapua (about 91% 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 6.5x47 Lapua in the MyLoads calculator →

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