Load data for 8.6 mm Blackout + 300gr Sierra HPBT LR MatchKing

460 suitable loads across 85 powder(s) for cartridge 8.6 mm Blackout with 300gr Sierra HPBT LR MatchKing bullet.

The most recommended powders for this combination are Hodgdon CFE223, Hodgdon LilGun and Alliant Power Pro 1200-R.

Based on SAAMI, the max. allowed case length is 1.685 in / 42.80 mm, the max. cartridge length is 2.825 in / 71.75 mm, and the max. allowed pressure is 61,999 PSI / 4,275 bar.

300gr Sierra HPBT LR MatchKing bullet image

Based on SAAMI, the max. allowed case length is 1.685 in / 42.80 mm, the max. cartridge length is 2.825 in / 71.75 mm, and the max. allowed pressure is 61,999 PSI / 4,275 bar.

Load Specifications

ImperialMetric

Bullet:.338 | 300gr | HPBT LR MatchKing

Cartridge:8.6 mm Blackout load data

Case Length (L3):1.685" | 42.8 mm

Cartridge Length (COL/L6):•••

Seated Depth:0.619" | 15.7 mm

Case Capacity:50 gow | 3.24 cm³

Primer Size:Large Rifle (LR)

Max. Pressure (SAAMI):61,999 psi | 4,275 bar

Barrel Length:16.0" | 406 mm

Min. Twist Rate:1:12.0

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Community Loads for 8.6 mm Blackout + 300gr Sierra HPBT LR MatchKing

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)

	34.0 gr	2.825"	12.0"	1765 fps	•••

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