Load data for .338 RCM + 250gr Speer Grand Slam
560 suitable loads across 97 powder(s) for cartridge .338 RCM with 250gr Speer Grand Slam bullet.
The most recommended powders for this combination are ReloadSwiss RS 60, Alliant Power Pro 2000-MR and ReloadSwiss RS 52.
Based on C.I.P., the max. allowed case length is 2.015 in / 51.18 mm, the max. cartridge length is 2.840 in / 72.14 mm, and the max. allowed pressure is 62,366 PSI / 4,300 bar.
Based on C.I.P., the max. allowed case length is 2.015 in / 51.18 mm, the max. cartridge length is 2.840 in / 72.14 mm, and the max. allowed pressure is 62,366 PSI / 4,300 bar.
Load Specifications
ImperialMetric
Bullet:.338 | 250gr | Grand Slam
Cartridge:.338 RCM load data
Case Length (L3):2.000" | 50.8 mm
Cartridge Length (COL/L6):•••
Seated Depth:0.433" | 11.0 mm
Case Capacity:71 gow | 4.60 cm³
Primer Size:Large Rifle (LR)
Max. Pressure (C.I.P.):62,366 psi | 4,300 bar
Barrel Length:24.0" | 610 mm
Min. Twist Rate:1:6.0
Get PRO license to unlock all data and calculators