Load data for .270 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.

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:.277 | 150gr | Grand Slam

Cartridge:.270 WSM load data

Case Length (L3):2.090" | 53.1 mm

Cartridge Length (COL/L6):•••

Seated Depth:0.667" | 16.9 mm

Case Capacity:79.5 gow | 5.15 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:1:10.5

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Community Loads for .270 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)

56.0 gr	2.700"	—	2688 fps	•••
60.0 gr	2.700"	—	2838 fps	•••

56.5 gr	2.700"	—	2937 fps	•••

•••	2.700"	—	2786 fps	•••
•••	2.700"	—	2948 fps	•••

•••	2.700"	—	2762 fps	•••
•••	2.700"	—	2927 fps	•••

•••	2.700"	—	2782 fps	•••
•••	2.700"	—	3005 fps	•••

•••	2.700"	—	2806 fps	•••
•••	2.700"	—	2963 fps	•••

•••	2.700"	—	2789 fps	•••
•••	2.700"	—	3052 fps	•••

•••	2.700"	—	2749 fps	•••
•••	2.700"	—	3030 fps	•••

•••	2.700"	—	2691 fps	•••
•••	2.700"	—	2857 fps	•••

•••	2.700"	—	2805 fps	•••

•••	2.700"	—	2789 fps	•••
•••	2.700"	—	2935 fps	•••

•••	2.700"	—	2800 fps	•••

•••	2.700"	—	2798 fps	•••

•••	2.700"	—	2887 fps	•••
•••	2.700"	—	2789 fps	•••
•••	2.700"	—	2961 fps	•••

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