Load data for .300 Win. Mag. + 220gr Sierra MatchKing

450 suitable loads across 74 powder(s) for cartridge .300 Win. Mag. with 220gr Sierra MatchKing bullet.

The most recommended powders for this combination are Winchester StaBALL HD, Hodgdon H4831 and Vihtavuori N560.

Based on C.I.P., the max. allowed case length is 2.620 in / 66.55 mm, the max. cartridge length is 3.340 in / 84.84 mm, and the max. allowed pressure is 62,366 PSI / 4,300 bar.

Based on C.I.P., the max. allowed case length is 2.620 in / 66.55 mm, the max. cartridge length is 3.340 in / 84.84 mm, and the max. allowed pressure is 62,366 PSI / 4,300 bar.

Load Specifications

ImperialMetric

Bullet:.308 | 220gr | MatchKing

Cartridge:.300 Win. Mag. load data

Case Length (L3):2.620" | 66.5 mm

Cartridge Length (COL/L6):•••

Seated Depth:0.673" | 17.1 mm

Case Capacity:90.5 gow | 5.86 cm³

Primer Size:Large Rifle Magnum (LRM)

Max. Pressure (C.I.P.):62,366 psi | 4,300 bar

Barrel Length:24.0" | 610 mm

Min. Twist Rate:1:11.0

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Community Loads for .300 Win. Mag. + 220gr Sierra MatchKing

Real loads for this combination shared by our community. Charge weights are only fully visible with an active Pro licence.

Charge (gr)	C.O.L.	Barrel Length	Velocity (fps)	Pressure (psi)

60.8 gr	3.340"	23.0"	2349 fps	•••
67.8 gr	3.290"	27.0"	2720 fps	•••
67.8 gr	3.340"	27.0"	2703 fps	•••
•••	3.340"	27.0"	2726 fps	•••

•••	3.450"	—	2437 fps	•••

•••	3.339"	26.0"	2635 fps	•••

•••	3.340"	24.0"	2707 fps	•••

Charge weights beyond the first rows and all pressure values are only visible with an active Pro licence.