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

Based on C.I.P., the max. allowed case length is 2.825 in / 71.75 mm, the max. cartridge length is 3.560 in / 90.42 mm, and the max. allowed pressure is 63,817 PSI / 4,400 bar.

Load Specifications

ImperialMetric

Bullet:.308 | 150gr | Grand Slam

Cartridge:.300 Weath. Mag. load data

Case Length (L3):2.824" | 71.7 mm

Cartridge Length (COL/L6):•••

Seated Depth:0.354" | 9.0 mm

Case Capacity:98.9 gow | 6.41 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 Weath. 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)

78.0 gr	3.490"	—	2883 fps	•••
82.0 gr	3.490"	—	3028 fps	•••

72.5 gr	3.490"	—	2987 fps	•••
•••	3.490"	—	3134 fps	•••

•••	3.490"	—	3065 fps	•••
•••	3.490"	—	3211 fps	•••

•••	3.490"	—	3073 fps	•••
•••	3.490"	—	3225 fps	•••

•••	3.490"	—	2851 fps	•••
•••	3.490"	—	3145 fps	•••

•••	3.490"	—	2825 fps	•••
•••	3.490"	—	3160 fps	•••

•••	3.490"	—	2800 fps	•••
•••	3.490"	—	2981 fps	•••

•••	3.490"	—	3036 fps	•••
•••	3.490"	—	3198 fps	•••

•••	3.490"	—	2987 fps	•••
•••	3.490"	—	3134 fps	•••

•••	3.490"	—	3087 fps	•••
•••	3.490"	—	3231 fps	•••

•••	3.490"	—	2968 fps	•••
•••	3.490"	—	3120 fps	•••

•••	3.490"	—	2947 fps	•••
•••	3.490"	—	3088 fps	•••

•••	3.490"	—	3067 fps	•••
•••	3.490"	—	3204 fps	•••

•••	3.490"	—	2769 fps	•••
•••	3.490"	—	3079 fps	•••

•••	3.490"	—	3096 fps	•••
•••	3.490"	—	3232 fps	•••

•••	3.490"	—	3092 fps	•••
•••	3.490"	—	3235 fps	•••

•••	3.490"	—	2987 fps	•••
•••	3.490"	—	3134 fps	•••

•••	3.490"	—	2992 fps	•••
•••	3.490"	—	3265 fps	•••
•••	3.490"	—	3018 fps	•••
•••	3.490"	—	3178 fps	•••

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