Load data for .270 Win. + 150gr Speer Grand Slam
The most recommended powders for this combination are Somchem S355.
Based on C.I.P., the max. allowed case length is 2.540 in / 64.52 mm, the max. cartridge length is 3.340 in / 84.84 mm, and the max. allowed pressure is 62,366 PSI / 4,300 bar.
Based on C.I.P., the max. allowed case length is 2.540 in / 64.52 mm, the max. cartridge length is 3.340 in / 84.84 mm, and the max. allowed pressure is 62,366 PSI / 4,300 bar.
Load Specifications
ImperialMetric
Bullet:.277 | 150gr | Grand Slam
Cartridge:.270 Win. load data
Case Length (L3):2.540" | 64.5 mm
Cartridge Length (COL/L6):•••
Seated Depth:0.567" | 14.4 mm
Case Capacity:67 gow | 4.34 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:1:10.5
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Community Loads for .270 Win. + 150gr Speer Grand Slam
Real loads for this combination shared by our community. Charge weights are only fully visible with an active Pro licence.
| Powder | Charge (gr) | C.O.L. | Barrel Length | Velocity (fps) | Pressure (psi) |
|---|---|---|---|---|---|
| 53.0 gr | 3.250" | — | 2622 fps | ••• | |
| 57.0 gr | 3.250" | — | 2813 fps | ••• | |
| 45.5 gr | 3.250" | — | 2572 fps | ••• | |
| ••• | 3.250" | — | 2809 fps | ••• | |
| ••• | 3.250" | — | 2781 fps | ••• | |
| ••• | 3.250" | — | 2555 fps | ••• | |
| ••• | 3.250" | — | 2752 fps | ••• | |
| ••• | 3.250" | — | 2509 fps | ••• | |
| ••• | 3.250" | — | 2713 fps | ••• | |
| ••• | 3.250" | — | 2527 fps | ••• | |
| ••• | 3.250" | — | 2758 fps | ••• | |
| ••• | 3.250" | — | 2781 fps | ••• | |
| ••• | 3.250" | — | 2532 fps | ••• | |
| ••• | 3.250" | — | 2727 fps | ••• | |
| ••• | 3.250" | — | 2635 fps | ••• | |
| ••• | 3.250" | — | 2828 fps | ••• | |
| ••• | 3.250" | — | 2678 fps | ••• | |
| ••• | 3.250" | — | 2878 fps | ••• | |
| ••• | 3.250" | — | 2694 fps | ••• | |
| ••• | 3.250" | — | 2595 fps | ••• | |
| ••• | 3.250" | — | 2782 fps | ••• | |
| ••• | 3.250" | — | 2747 fps | ••• | |
| ••• | 3.287" | 22.4" | 2612 fps | ••• | |
| ••• | 3.287" | 22.4" | 2657 fps | ••• | |
| ••• | 3.340" | 22.4" | 2644 fps | ••• | |
| ••• | 3.250" | — | 2585 fps | ••• | |
| ••• | 3.250" | — | 2772 fps | ••• | |
| ••• | 3.340" | 22.0" | 2631 fps | ••• | |
| ••• | 3.250" | — | 2679 fps | ••• | |
| ••• | 3.250" | — | 2872 fps | ••• | |
| ••• | 3.250" | — | 2639 fps | ••• | |
| ••• | 3.250" | — | 2881 fps | ••• | |
| ••• | 3.250" | — | 2699 fps | ••• | |
| ••• | 3.250" | — | 2911 fps | ••• | |
Charge weights beyond the first rows and all pressure values are only visible with an active Pro licence.