Load data for .300 H&H Mag. + 150gr Speer Grand Slam

Based on C.I.P., the max. allowed case length is 2.850 in / 72.39 mm, the max. cartridge length is 3.600 in / 91.44 mm, and the max. allowed pressure is 62,366 PSI / 4,300 bar.

Load Specifications

ImperialMetric

Bullet:.308 | 150gr | Grand Slam

Cartridge:.300 H&H Mag. load data

Case Length (L3):2.850" | 72.4 mm

Cartridge Length (COL/L6):•••

Seated Depth:0.355" | 9.0 mm

Case Capacity:85.9 gow | 5.57 cm³

Primer Size:Large Rifle Magnum (LRM)

Max. Pressure (C.I.P.):62,366 psi | 4,300 bar

Barrel Length:24.0" | 610 mm

Min. Twist Rate:1:16.0

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Community Loads for .300 H&H Mag. + 150gr Speer Grand Slam

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

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

64.0 gr	3.515"	—	2848 fps	•••
68.0 gr	3.515"	—	3017 fps	•••

63.2 gr	3.515"	—	2895 fps	•••
•••	3.515"	—	3179 fps	•••

•••	3.515"	—	2778 fps	•••
•••	3.515"	—	3055 fps	•••

•••	3.515"	—	2852 fps	•••
•••	3.515"	—	3016 fps	•••

•••	3.515"	—	2776 fps	•••
•••	3.515"	—	3068 fps	•••

•••	3.515"	—	2753 fps	•••
•••	3.515"	—	3094 fps	•••

•••	3.515"	—	2853 fps	•••

•••	3.515"	—	2816 fps	•••
•••	3.515"	—	2974 fps	•••

•••	3.515"	—	2878 fps	•••
•••	3.515"	—	3036 fps	•••

•••	3.515"	—	3010 fps	•••
•••	3.515"	—	3165 fps	•••

•••	3.515"	—	2953 fps	•••
•••	3.515"	—	3235 fps	•••

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