Load data for 5.56 x 45 NATO + 55gr Sierra GameKing

273 suitable loads across 46 powder(s) for cartridge 5.56 x 45 NATO with 55gr Sierra GameKing bullet.

The most recommended powders for this combination are ADI AR 2219, Hodgdon CFE223 and ADI AR 2207.

Based on NATO EPVAT, the max. allowed case length is 1.760 in / 44.70 mm, the max. cartridge length is 2.260 in / 57.40 mm, and the max. allowed pressure is 62,366 PSI / 4,300 bar.

Based on NATO EPVAT, the max. allowed case length is 1.760 in / 44.70 mm, the max. cartridge length is 2.260 in / 57.40 mm, and the max. allowed pressure is 62,366 PSI / 4,300 bar.

Load Specifications

ImperialMetric

Bullet:.224 | 55gr | GameKing

Cartridge:5.56 x 45 NATO load data

Case Length (L3):1.759" | 44.7 mm

Cartridge Length (COL/L6):•••

Seated Depth:0.329" | 8.3 mm

Case Capacity:30 gow | 1.94 cm³

Primer Size:Small Rifle (SR)

Max. Pressure (NATO EPVAT):62,366 psi | 4,300 bar

Barrel Length:20.0" | 508 mm

Min. Twist Rate:1:11.5

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Community Loads for 5.56 x 45 NATO + 55gr Sierra GameKing

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

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

	27.3 gr	2.260"	20.0"	3212 fps	•••

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