Load data for .375 Rem. Ultra Mag. + 270gr Speer Boat-Tail
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 63,817 PSI / 4,400 bar.

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 63,817 PSI / 4,400 bar.

Load Specifications
ImperialMetric
Bullet:.375 | 270gr | Boat-Tail
Cartridge:.375 Rem. Ultra Mag. load data
Case Length (L3):2.850" | 72.4 mm
Cartridge Length (COL/L6):•••
Seated Depth:0.550" | 14.0 mm
Case Capacity:117 gow | 7.58 cm³
Primer Size:Large Rifle Magnum (LRM)
Max. Pressure (C.I.P.):63,817 psi | 4,400 bar
Barrel Length:24.0" | 610 mm
Get PRO license to unlock all data and calculators
Community Loads for .375 Rem. Ultra Mag. + 270gr Speer Boat-Tail
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) |
|---|---|---|---|---|---|
| 87.3 gr | 3.600" | — | 2669 fps | ••• | |
| 85.1 gr | 3.600" | — | 2676 fps | ••• | |
| 82.4 gr | 3.600" | — | 2559 fps | ••• | |
| ••• | 3.600" | — | 2799 fps | ••• | |
| ••• | 3.600" | — | 2702 fps | ••• | |
| ••• | 3.600" | — | 2599 fps | ••• | |
| ••• | 3.600" | — | 2848 fps | ••• | |
| ••• | 3.600" | — | 2646 fps | ••• | |
| ••• | 3.600" | — | 2558 fps | ••• | |
| ••• | 3.600" | — | 2582 fps | ••• | |
| ••• | 3.600" | — | 2850 fps | ••• | |
| ••• | 3.600" | — | 2598 fps | ••• | |
| ••• | 3.600" | — | 2885 fps | ••• | |
| ••• | 3.600" | — | 2710 fps | ••• | |
| ••• | 3.600" | — | 2617 fps | ••• | |
Charge weights beyond the first rows and all pressure values are only visible with an active Pro licence.