Load Specifications
Bullet Manufacturer:Nosler
Bullet Weight:270 gr
Bullet Diameter:0.375"
Bullet Length:<<locked>>
Caliber:.375 Weath. Mag. load data
Case Length (l3):2.85"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:105 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:24"
Max. allowed Pressure:63,817 psi
Recommended Twist Rate:1:16.5
Load data in caliber .375 Weath. Mag. with .375 | 270gr | Nosler CT FailSafe bullet and 106 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 2000-MR, ReloadSwiss RS 60 and ReloadSwiss RS 52.
Important Notice: DO NOT go below Minimum Charge or above Maximum Charge. Since we have no control over the equipment and components used, any responsibility and liability for the results achieved is rejected.
Only powders/loads that match the current filter criteria are displayed: max pressure of a load ≤ 90% of max. standardized pressure, fill rate ≥ 80% and propellant combustion ≥ 95%. Use the sliders above the tables to adjust these thresholds.
Charge: Powder weight in grains. Start with the minimum load and work up carefully.
FR (Fill Rate): Case fill as a percentage. Values above 100% mean compressed loads.
MaxP / %: Maximum chamber pressure in bar and as a percentage of the standardized maximum for this caliber.
V(0): Muzzle velocity in feet per second (fps) at the standardized barrel length.
z (Powder Burn): Estimated propellant combustion percentage at bullet exit.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 88% | 56,971 psi | 89% | 2572 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 55,376 psi | 87% | 2598 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 54,795 psi | 86% | 2592 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 57,305 psi | 90% | 2661 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 54,984 psi | 86% | 2589 fps | 96.2% |
| Accurate 4064 | <<locked>> | 94% | 54,505 psi | 85% | 2631 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 50,140 psi | 79% | 2651 fps | 98.8% |
| Accurate LT-30 | <<locked>> | 82% | 56,173 psi | 88% | 2520 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 56,666 psi | 89% | 2546 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 55,883 psi | 88% | 2664 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 96% | 56,797 psi | 89% | 2661 fps | 99.7% |
| ADI AR 2219 | <<locked>> | 82% | 57,276 psi | 90% | 2635 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 88% | 55,187 psi | 86% | 2621 fps | 100% |
| Alliant AR-Comp | <<locked>> | 88% | 55,288 psi | 87% | 2598 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 57,029 psi | 89% | 2723 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 55,230 psi | 87% | 2772 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 56,449 psi | 88% | 2684 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 84% | 56,768 psi | 89% | 2575 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 57,116 psi | 90% | 2703 fps | 99.8% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 49,211 psi | 77% | 2654 fps | 98.9% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 57,072 psi | 89% | 2799 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 34,838 psi | 55% | 2402 fps | 96.8% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 55,390 psi | 87% | 2520 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 55,550 psi | 87% | 2680 fps | 99.5% |
| Bofors RP3 | <<locked>> | 96% | 56,971 psi | 89% | 2700 fps | 100% |
| Bofors RP7ᴾ | <<locked>> | 100% | 57,537 psi | 90% | 2664 fps | 97% |
| Hodgdon Benchmark | <<locked>> | 88% | 57,087 psi | 89% | 2605 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 54,056 psi | 85% | 2651 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 55,927 psi | 88% | 2740 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 84% | 55,912 psi | 88% | 2618 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 56,913 psi | 89% | 2644 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 54,621 psi | 86% | 2657 fps | 98.9% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 53,461 psi | 84% | 2697 fps | 97.1% |
| Hodgdon H4350 | <<locked>> | 98% | 54,839 psi | 86% | 2664 fps | 95.8% |
| Hodgdon H4895 | <<locked>> | 90% | 56,376 psi | 88% | 2674 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 45,368 psi | 71% | 2546 fps | 99.3% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 55,419 psi | 87% | 2707 fps | 100% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 54,708 psi | 86% | 2733 fps | 96.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,114 psi | 55% | 1578 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 54,375 psi | 85% | 2631 fps | 99.9% |
| IMR 3031 | <<locked>> | 90% | 56,144 psi | 88% | 2661 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 56,420 psi | 88% | 2648 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 92% | 56,927 psi | 89% | 2631 fps | 97.5% |
| IMR 4198 | <<locked>> | 84% | 56,811 psi | 89% | 2536 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 55,927 psi | 88% | 2648 fps | 97.2% |
| IMR 4831ᴾ | <<locked>> | 100% | 47,718 psi | 75% | 2595 fps | 98.5% |
| IMR 4895 | <<locked>> | 92% | 55,158 psi | 86% | 2687 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 88% | 55,187 psi | 86% | 2621 fps | 100% |
| Lovex D073.5 | <<locked>> | 84% | 55,317 psi | 87% | 2612 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 55,419 psi | 87% | 2644 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 55,825 psi | 87% | 2598 fps | 99.9% |
| Lovex S062 | <<locked>> | 94% | 55,825 psi | 87% | 2641 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 54,897 psi | 86% | 2638 fps | 98.3% |
| Lovex S070ᴾ | <<locked>> | 100% | 52,170 psi | 82% | 2618 fps | 96.9% |
| Norma 201 | <<locked>> | 90% | 54,694 psi | 86% | 2615 fps | 100% |
| Norma 202 | <<locked>> | 90% | 55,143 psi | 86% | 2618 fps | 100% |
| Norma 203B | <<locked>> | 94% | 56,217 psi | 88% | 2690 fps | 99.9% |
| Norma URPᴾ | <<locked>> | 100% | 49,574 psi | 78% | 2641 fps | 98.7% |
| Ramshot Big Game | <<locked>> | 94% | 56,913 psi | 89% | 2717 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 48,747 psi | 76% | 2631 fps | 96.9% |
| Ramshot TAC | <<locked>> | 88% | 55,506 psi | 87% | 2638 fps | 98.6% |
| Ramshot Wild Boar | <<locked>> | 88% | 54,955 psi | 86% | 2657 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 86% | 56,246 psi | 88% | 2625 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,476 psi | 56% | 1617 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 54,650 psi | 86% | 2605 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 55,288 psi | 87% | 2644 fps | 97.8% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 57,537 psi | 90% | 2769 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 57,000 psi | 89% | 2799 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 49,676 psi | 78% | 2667 fps | 98.5% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 50,488 psi | 79% | 2690 fps | 98.2% |
| Rottweil R 901 | <<locked>> | 88% | 55,898 psi | 88% | 2602 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 55,085 psi | 86% | 2612 fps | 100% |
| Rottweil R 903 | <<locked>> | 98% | 56,565 psi | 89% | 2687 fps | 100% |
| Rottweil R 907ᴾ | <<locked>> | 100% | 57,537 psi | 90% | 2664 fps | 97% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 54,897 psi | 86% | 2638 fps | 98.3% |
| Shooters World Match Rifle | <<locked>> | 90% | 55,419 psi | 87% | 2644 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 55,825 psi | 87% | 2641 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 52,170 psi | 82% | 2618 fps | 96.9% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 54,520 psi | 85% | 2579 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 57,624 psi | 90% | 2648 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 54,853 psi | 86% | 2697 fps | 99.8% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 57,667 psi | 90% | 2595 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 57,435 psi | 90% | 2667 fps | 99.1% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 54,273 psi | 85% | 2638 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 56,623 psi | 89% | 2559 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 56,275 psi | 88% | 2556 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 55,637 psi | 87% | 2598 fps | 97.2% |
| Somchem S321 | <<locked>> | 86% | 56,405 psi | 88% | 2657 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 55,680 psi | 87% | 2559 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 56,811 psi | 89% | 2657 fps | 99.9% |
| Somchem S355 | <<locked>> | 98% | 57,159 psi | 90% | 2684 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 44,411 psi | 70% | 2595 fps | 99.9% |
| Vihtavuori N130 | <<locked>> | 86% | 56,478 psi | 89% | 2526 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 56,637 psi | 89% | 2546 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 54,476 psi | 85% | 2582 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 55,579 psi | 87% | 2598 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 55,114 psi | 86% | 2621 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 52,373 psi | 82% | 2641 fps | 98.9% |
| Vihtavuori N530 | <<locked>> | 88% | 55,637 psi | 87% | 2621 fps | 100% |
| Vihtavuori N540 | <<locked>> | 94% | 57,130 psi | 90% | 2641 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 51,358 psi | 80% | 2648 fps | 98.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 37,246 psi | 58% | 2470 fps | 96.8% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 53,171 psi | 83% | 2628 fps | 99.9% |
| Winchester 748 | <<locked>> | 88% | 55,230 psi | 87% | 2667 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 53,664 psi | 84% | 2700 fps | 97.1% |
| Winchester StaBALL Match | <<locked>> | 90% | 53,940 psi | 85% | 2648 fps | 99.9% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 44,672 psi | 70% | 2405 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 48,631 psi | 76% | 2507 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 37,130 psi | 58% | 2329 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 43,627 psi | 68% | 2464 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 51,547 psi | 81% | 2539 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 35,128 psi | 55% | 2320 fps | 99.7% |
| Accurate 4350 | <<locked>> | 90% | 35,462 psi | 56% | 2388 fps | 95.4% |
| Accurate LT-30 | <<locked>> | 80% | 52,924 psi | 83% | 2477 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 53,330 psi | 84% | 2500 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 41,002 psi | 64% | 2425 fps | 98.2% |
| ADI AR 2208 | <<locked>> | 80% | 34,853 psi | 55% | 2283 fps | 95.7% |
| ADI AR 2219 | <<locked>> | 80% | 53,592 psi | 84% | 2589 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 43,062 psi | 67% | 2438 fps | 99.3% |
| Alliant AR-Comp | <<locked>> | 80% | 42,540 psi | 67% | 2428 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 50,111 psi | 79% | 2621 fps | 99.8% |
| Alliant Power Pro 2000-MR | 66.2 gr | 80% | 36,912 psi | 58% | 2434 fps | 96% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 34,113 psi | 53% | 2303 fps | 97.3% |
| Alliant Reloder-10x | <<locked>> | 80% | 50,169 psi | 79% | 2490 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 36,854 psi | 58% | 2359 fps | 96.6% |
| Alliant Reloder-16 | <<locked>> | 90% | 36,289 psi | 57% | 2402 fps | 95.5% |
| Alliant Reloder-17 | <<locked>> | 82% | 31,430 psi | 49% | 2313 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 98% | 32,822 psi | 51% | 2352 fps | 95.9% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 51,938 psi | 81% | 2477 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 39,885 psi | 63% | 2421 fps | 96.8% |
| Bofors RP3 | <<locked>> | 80% | 33,504 psi | 53% | 2303 fps | 97.2% |
| Bofors RP7 | <<locked>> | 94% | 47,732 psi | 75% | 2516 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 44,904 psi | 70% | 2428 fps | 99.8% |
| Hodgdon BL-C2 | <<locked>> | 80% | 41,292 psi | 65% | 2451 fps | 99.5% |
| Hodgdon CFE223 | <<locked>> | 80% | 45,469 psi | 71% | 2579 fps | 98.6% |
| Hodgdon H322 | <<locked>> | 80% | 49,095 psi | 77% | 2526 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 49,850 psi | 78% | 2549 fps | 100% |
| Hodgdon H380 | <<locked>> | 82% | 36,912 psi | 58% | 2356 fps | 95.1% |
| Hodgdon H414 | <<locked>> | 96% | 46,876 psi | 73% | 2592 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 96% | 51,430 psi | 81% | 2615 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 41,365 psi | 65% | 2434 fps | 98.7% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 31,140 psi | 49% | 2254 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 37,086 psi | 58% | 2402 fps | 98.2% |
| Hodgdon Superformance | <<locked>> | 98% | 50,981 psi | 80% | 2674 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,020 psi | 41% | 1407 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 39,755 psi | 62% | 2392 fps | 98.3% |
| IMR 3031 | <<locked>> | 80% | 40,640 psi | 64% | 2434 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 36,535 psi | 57% | 2313 fps | 96.6% |
| IMR 4166 Enduron | <<locked>> | 86% | 47,253 psi | 74% | 2480 fps | 95.5% |
| IMR 4198 | <<locked>> | 80% | 50,560 psi | 79% | 2454 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 92% | 46,659 psi | 73% | 2500 fps | 95.2% |
| IMR 4831 | <<locked>> | 90% | 34,548 psi | 54% | 2349 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 37,724 psi | 59% | 2388 fps | 97.5% |
| IMR 8208 XBR | <<locked>> | 80% | 43,062 psi | 67% | 2438 fps | 99.3% |
| Lovex D073.5 | <<locked>> | 80% | 48,341 psi | 76% | 2513 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 39,537 psi | 62% | 2405 fps | 99.7% |
| Lovex S060 | <<locked>> | 80% | 41,481 psi | 65% | 2372 fps | 98.3% |
| Lovex S062 | <<locked>> | 80% | 36,434 psi | 57% | 2323 fps | 98.3% |
| Lovex S065 | <<locked>> | 90% | 40,553 psi | 64% | 2402 fps | 95.3% |
| Lovex S070 | <<locked>> | 96% | 46,209 psi | 72% | 2523 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 40,147 psi | 63% | 2382 fps | 99% |
| Norma 202 | <<locked>> | 80% | 40,234 psi | 63% | 2392 fps | 100% |
| Norma 203B | <<locked>> | 80% | 36,245 psi | 57% | 2349 fps | 97% |
| Norma URP | <<locked>> | 90% | 36,158 psi | 57% | 2392 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 35,534 psi | 56% | 2359 fps | 96.5% |
| Ramshot Hunter | <<locked>> | 96% | 42,931 psi | 67% | 2530 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 42,801 psi | 67% | 2431 fps | 96.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 42,090 psi | 66% | 2454 fps | 98.3% |
| Ramshot X-Terminator | <<locked>> | 80% | 46,354 psi | 73% | 2477 fps | 98.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,281 psi | 41% | 1440 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 48,254 psi | 76% | 2513 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 42,685 psi | 67% | 2441 fps | 95% |
| ReloadSwiss RS 52 | 64.2 gr | 80% | 38,145 psi | 60% | 2451 fps | 97% |
| ReloadSwiss RS 60 | 65.2 gr | 80% | 31,386 psi | 49% | 2323 fps | 98.1% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 37,884 psi | 59% | 2457 fps | 95.7% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 41,220 psi | 65% | 2523 fps | 95.8% |
| Rottweil R 901 | <<locked>> | 80% | 43,932 psi | 69% | 2425 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 38,189 psi | 60% | 2336 fps | 98.6% |
| Rottweil R 903 | <<locked>> | 80% | 31,604 psi | 50% | 2251 fps | 96.2% |
| Rottweil R 907 | <<locked>> | 94% | 47,732 psi | 75% | 2516 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 90% | 40,553 psi | 64% | 2402 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 39,537 psi | 62% | 2405 fps | 99.7% |
| Shooters World Precision | <<locked>> | 80% | 36,434 psi | 57% | 2323 fps | 98.3% |
| Shooters World SW4350 | <<locked>> | 96% | 46,209 psi | 72% | 2523 fps | 95.6% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 50,879 psi | 80% | 2530 fps | 99.8% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 53,896 psi | 84% | 2598 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 32,634 psi | 51% | 2297 fps | 95.5% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 51,126 psi | 80% | 2513 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 40,944 psi | 64% | 2408 fps | 96.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 39,465 psi | 62% | 2395 fps | 97.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 41,785 psi | 65% | 2346 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,490 psi | 54% | 2224 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 45,585 psi | 71% | 2448 fps | 95.1% |
| Somchem S321 | <<locked>> | 80% | 46,238 psi | 72% | 2507 fps | 99.8% |
| Somchem S335 | <<locked>> | 80% | 41,249 psi | 65% | 2349 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 40,654 psi | 64% | 2408 fps | 98% |
| Somchem S355 | <<locked>> | 80% | 32,605 psi | 51% | 2260 fps | 96.3% |
| Somchem S365 | <<locked>> | 86% | 28,485 psi | 45% | 2244 fps | 95.9% |
| Vihtavuori N130 | <<locked>> | 80% | 47,239 psi | 74% | 2408 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 41,959 psi | 66% | 2343 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 37,420 psi | 59% | 2329 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 38,159 psi | 60% | 2336 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 80% | 30,951 psi | 49% | 2205 fps | 97.2% |
| Vihtavuori N160 | <<locked>> | 88% | 35,549 psi | 56% | 2346 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 42,902 psi | 67% | 2431 fps | 99.4% |
| Vihtavuori N540 | <<locked>> | 80% | 36,637 psi | 57% | 2323 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 90% | 37,072 psi | 58% | 2395 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 96% | 32,735 psi | 51% | 2369 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 31,430 psi | 49% | 2228 fps | 95.6% |
| Winchester 748 | <<locked>> | 80% | 42,235 psi | 66% | 2470 fps | 99.7% |
| Winchester 760 | <<locked>> | 96% | 47,065 psi | 74% | 2595 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 38,653 psi | 61% | 2395 fps | 98.2% |
Recommended = one of the top powders for this cartridge and bullet combination.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 106 powders for .375 Weath. Mag. loaded with the .375 | 270gr | Nosler CT FailSafe. Alliant Reloder-17 delivers the highest muzzle velocity at 2,799 fps; across all powders the maximum-charge window runs from 1,578 fps to 2,799 fps. Accurate 4350 gives the best case fill at 100 %, and 106 of the 106 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 270.0 gr projectile in 0.375" calls for a 1:16.5 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Alliant Reloder-17 reach 100 % fill or more at maximum charge, so these are compressed loads: they need a long drop tube to seat cleanly and react sensitively to the case capacity of your own brass lot. Alliant Power Pro 2000-MR, ReloadSwiss RS 60, ReloadSwiss RS 52 rank at the top here: for .375 Weath. Mag. with the .375 | 270gr | Nosler CT FailSafe they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.