Load data for .255 GS + 120gr Speer Grand Slam
564 suitable loads across 94 powder(s) for cartridge .255 GS with 120gr Speer Grand Slam bullet.
The most recommended powders for this combination are ReloadSwiss RS 70, Alliant Reloder-26 and Hodgdon Superformance.
Based on C.I.P., the max. allowed case length is 2.165 in / 55.00 mm, the max. cartridge length is 2.854 in / 72.50 mm, and the max. allowed pressure is 63,817 PSI / 4,400 bar.
Based on C.I.P., the max. allowed case length is 2.165 in / 55.00 mm, the max. cartridge length is 2.854 in / 72.50 mm, and the max. allowed pressure is 63,817 PSI / 4,400 bar.
Load Specifications
ImperialMetric
Bullet:.257 | 120gr | Grand Slam
Cartridge:.255 GS load data
Case Length (L3):2.165" | 55.0 mm
Cartridge Length (COL/L6):•••
Seated Depth:0.444" | 11.3 mm
Case Capacity:62 gow | 4.02 cm³
Primer Size:Large Rifle (LR)
Max. Pressure (C.I.P.):63,817 psi | 4,400 bar
Barrel Length:24.0" | 610 mm
Min. Twist Rate:1:11.0
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