Load data for 8.5 mm Messner Mag. + 300gr MAKER .338 ARC/Spectre Expanding Subsonic
443 suitable loads across 74 powder(s) for cartridge 8.5 mm Messner Mag. with 300gr MAKER .338 ARC/Spectre Expanding Subsonic bullet.
The most recommended powders for this combination are Winchester StaBALL HD, Vihtavuori N560 and Accurate MAGPRO.
Based on C.I.P., the max. allowed case length is 2.514 in / 63.85 mm, the max. cartridge length is 3.465 in / 88.00 mm, and the max. allowed pressure is 63,817 PSI / 4,400 bar.
Based on C.I.P., the max. allowed case length is 2.514 in / 63.85 mm, the max. cartridge length is 3.465 in / 88.00 mm, and the max. allowed pressure is 63,817 PSI / 4,400 bar.
Load Specifications
ImperialMetric
Cartridge:8.5 mm Messner Mag. load data
Case Length (L3):2.508" | 63.7 mm
Cartridge Length (COL/L6):•••
Seated Depth:0.845" | 21.5 mm
Case Capacity:106 gow | 6.87 cm³
Primer Size:Large Rifle Magnum (LRM)
Max. Pressure (C.I.P.):63,817 psi | 4,400 bar
Barrel Length:25.6" | 650 mm
Min. Twist Rate:1:11.5
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