Load data for .300 WSM + 150gr Speer Grand Slam

Based on C.I.P., the max. allowed case length is 2.100 in / 53.34 mm, the max. cartridge length is 2.860 in / 72.64 mm, and the max. allowed pressure is 63,817 PSI / 4,400 bar.

Load Specifications

ImperialMetric

Bullet:.308 | 150gr | Grand Slam

Cartridge:.300 WSM load data

Case Length (L3):2.090" | 53.1 mm

Cartridge Length (COL/L6):•••

Seated Depth:0.330" | 8.4 mm

Case Capacity:81.3 gow | 5.27 cm³

Primer Size:Large Rifle Magnum (LRM)

Max. Pressure (C.I.P.):63,817 psi | 4,400 bar

Barrel Length:24.0" | 610 mm

Min. Twist Rate:1:16.0

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Community Loads for .300 WSM + 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)

61.0 gr	2.780"	—	2855 fps	•••
65.0 gr	2.780"	—	3019 fps	•••

61.7 gr	2.780"	—	2912 fps	•••
•••	2.780"	—	3204 fps	•••

•••	2.780"	—	2846 fps	•••
•••	2.780"	—	3130 fps	•••

•••	2.780"	—	3003 fps	•••
•••	2.780"	—	3177 fps	•••

•••	2.780"	—	2933 fps	•••
•••	2.780"	—	3098 fps	•••

•••	2.780"	—	2912 fps	•••
•••	2.780"	—	3083 fps	•••

•••	2.780"	—	2979 fps	•••
•••	2.780"	—	3146 fps	•••

•••	2.780"	—	2866 fps	•••
•••	2.780"	—	3045 fps	•••

•••	2.780"	—	2993 fps	•••

•••	2.780"	—	2920 fps	•••
•••	2.780"	—	3085 fps	•••

•••	2.780"	—	3016 fps	•••
•••	2.780"	—	3180 fps	•••

•••	2.780"	—	2816 fps	•••

•••	2.780"	—	2975 fps	•••

•••	2.780"	—	2934 fps	•••
•••	2.780"	—	3105 fps	•••

•••	2.780"	—	2991 fps	•••
•••	2.780"	—	3275 fps	•••

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