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6.5x55 Swedish Load Data & Ballistics Calculator

Estimate chamber pressure and muzzle velocity for the 6.5x55 Swedish 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.

6.5x55 Swedish reference

Maximum average pressure (MAP)51,000 psi
Nominal case capacity57.5 gr H₂O
Groove / bullet diameter0.265 in (6.73 mm)

Example simulation illustrative

Bullet
Hornady 0.264 140 gr BTHP Match
Powder
Hodgdon H4350
Charge
39.1 gr
Barrel
29 in

Muzzle velocity

2,596 fps

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

39,850 – 50,113 – 61,665 psi

nominal is 98% of the 51,000 psi maximum average pressure

This sample load runs near the maximum average pressure for the 6.5x55 Swedish (about 98% 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 6.5x55 Swedish in the MyLoads calculator →

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