Load Specifications
Bullet Manufacturer:Nosler
Bullet Weight:270 gr
Bullet Diameter:0.375"
Bullet Length:<<locked>>
Caliber:.375 Rem. Ultra Mag. load data
Case Length (l3):2.85"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:117 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 Rem. Ultra Mag. with .375 | 270gr | Nosler CT FailSafe bullet and 104 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Hodgdon Superformance and Alliant Reloder-17.
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>> | 82% | 55,622 psi | 87% | 2549 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 54,911 psi | 86% | 2575 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 56,289 psi | 88% | 2638 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 57,029 psi | 89% | 2631 fps | 98.3% |
| Accurate 3100ᴾ | <<locked>> | 100% | 45,745 psi | 72% | 2552 fps | 98.1% |
| Accurate 4064 | <<locked>> | 88% | 55,143 psi | 86% | 2625 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 55,274 psi | 87% | 2710 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 84% | 54,839 psi | 86% | 2654 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 55,898 psi | 88% | 2654 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 53,214 psi | 83% | 2690 fps | 97% |
| ADI Benchmark 8208 | <<locked>> | 84% | 57,130 psi | 90% | 2651 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 54,911 psi | 86% | 2575 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 54,665 psi | 86% | 2766 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 53,011 psi | 83% | 2690 fps | 97.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 56,333 psi | 88% | 2677 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 56,724 psi | 89% | 2697 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 98% | 56,101 psi | 88% | 2762 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 94% | 57,609 psi | 90% | 2792 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 52,214 psi | 82% | 2680 fps | 97% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 43,120 psi | 68% | 2575 fps | 99.9% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 38,014 psi | 60% | 2487 fps | 96.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 48,820 psi | 77% | 2740 fps | 99.7% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 54,621 psi | 86% | 2667 fps | 99.9% |
| Bofors RP3 | <<locked>> | 90% | 57,174 psi | 90% | 2690 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 56,724 psi | 89% | 2667 fps | 98.5% |
| Hodgdon Benchmark | <<locked>> | 82% | 55,187 psi | 86% | 2585 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 56,898 psi | 89% | 2680 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 54,143 psi | 85% | 2657 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 94% | 54,230 psi | 85% | 2710 fps | 98.7% |
| Hodgdon H4350 | <<locked>> | 92% | 54,549 psi | 85% | 2674 fps | 97.6% |
| Hodgdon H4895 | <<locked>> | 84% | 55,390 psi | 87% | 2661 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 56,115 psi | 88% | 2687 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 55,129 psi | 86% | 2690 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 54,636 psi | 86% | 2743 fps | 98.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,766 psi | 56% | 1634 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 56,463 psi | 88% | 2661 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 55,738 psi | 87% | 2641 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 55,434 psi | 87% | 2638 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 55,129 psi | 86% | 2621 fps | 98.6% |
| IMR 4350 | <<locked>> | 98% | 57,363 psi | 90% | 2694 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 92% | 55,114 psi | 86% | 2648 fps | 98.6% |
| IMR 4831 | <<locked>> | 98% | 55,680 psi | 87% | 2703 fps | 100% |
| IMR 4895 | <<locked>> | 86% | 54,621 psi | 86% | 2677 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 57,130 psi | 90% | 2651 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 54,897 psi | 86% | 2628 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 57,421 psi | 90% | 2628 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 55,521 psi | 87% | 2635 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 54,665 psi | 86% | 2641 fps | 99.4% |
| Lovex S070 | <<locked>> | 96% | 55,782 psi | 87% | 2677 fps | 99% |
| Lovex S071ᴾ | <<locked>> | 100% | 37,884 psi | 59% | 2411 fps | 96.1% |
| Norma 201 | <<locked>> | 86% | 56,985 psi | 89% | 2644 fps | 100% |
| Norma 202 | <<locked>> | 86% | 57,580 psi | 90% | 2644 fps | 100% |
| Norma 203B | <<locked>> | 88% | 55,970 psi | 88% | 2684 fps | 100% |
| Norma 204 | <<locked>> | 96% | 54,447 psi | 85% | 2690 fps | 97.1% |
| Norma MRPᴾ | <<locked>> | 100% | 48,472 psi | 76% | 2697 fps | 97.8% |
| Norma URP | <<locked>> | 98% | 57,653 psi | 90% | 2746 fps | 100% |
| Ramshot Big Game | <<locked>> | 88% | 56,608 psi | 89% | 2707 fps | 100% |
| Ramshot Hunter | <<locked>> | 98% | 56,463 psi | 88% | 2746 fps | 99.5% |
| Ramshot TAC | <<locked>> | 84% | 57,435 psi | 90% | 2674 fps | 99.7% |
| Ramshot Wild Boar | <<locked>> | 84% | 57,377 psi | 90% | 2690 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,332 psi | 57% | 1673 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 54,404 psi | 85% | 2641 fps | 99% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 57,522 psi | 90% | 2759 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 57,145 psi | 90% | 2789 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 54,969 psi | 86% | 2733 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 54,099 psi | 85% | 2759 fps | 99.8% |
| Rottweil R 901 | <<locked>> | 82% | 54,491 psi | 85% | 2582 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 57,653 psi | 90% | 2644 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 57,000 psi | 89% | 2680 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 54,984 psi | 86% | 2664 fps | 96.2% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 51,053 psi | 80% | 2664 fps | 96.9% |
| Rottweil R 907 | <<locked>> | 94% | 56,724 psi | 89% | 2667 fps | 98.5% |
| Shooters World Long Rifle | <<locked>> | 94% | 54,665 psi | 86% | 2641 fps | 99.4% |
| Shooters World Match Rifle | <<locked>> | 84% | 54,897 psi | 86% | 2628 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 55,521 psi | 87% | 2635 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 55,782 psi | 87% | 2677 fps | 99% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 55,027 psi | 86% | 2690 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 55,129 psi | 86% | 2526 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 56,159 psi | 88% | 2654 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 56,753 psi | 89% | 2674 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 54,810 psi | 86% | 2539 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 55,303 psi | 87% | 2539 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 54,984 psi | 86% | 2598 fps | 98.6% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 50,575 psi | 79% | 2657 fps | 96.8% |
| Somchem S335 | <<locked>> | 86% | 57,653 psi | 90% | 2579 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 55,608 psi | 87% | 2641 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 57,087 psi | 89% | 2680 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 56,217 psi | 88% | 2746 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 51,750 psi | 81% | 2641 fps | 97.8% |
| Vihtavuori N133 | <<locked>> | 84% | 55,129 psi | 86% | 2526 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 57,595 psi | 90% | 2605 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 54,839 psi | 86% | 2582 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 55,056 psi | 86% | 2612 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 56,579 psi | 89% | 2694 fps | 99.9% |
| Vihtavuori N530 | <<locked>> | 84% | 57,682 psi | 90% | 2648 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 56,405 psi | 88% | 2621 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 55,666 psi | 87% | 2700 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 47,921 psi | 75% | 2648 fps | 99.8% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 56,550 psi | 89% | 2667 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 54,447 psi | 85% | 2648 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 54,404 psi | 85% | 2710 fps | 98.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,769 psi | 61% | 2602 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 86% | 56,927 psi | 89% | 2680 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 48,559 psi | 76% | 2582 fps | 96% |
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% | 52,272 psi | 82% | 2510 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 45,310 psi | 71% | 2451 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 52,576 psi | 82% | 2592 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 43,845 psi | 69% | 2431 fps | 95.7% |
| Accurate 3100 | <<locked>> | 94% | 37,202 psi | 58% | 2398 fps | 95.9% |
| Accurate 4064 | <<locked>> | 80% | 42,830 psi | 67% | 2451 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 31,720 psi | 50% | 2297 fps | 95.7% |
| ADI AR 2206H | <<locked>> | 80% | 48,312 psi | 76% | 2556 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 80% | 41,075 psi | 64% | 2421 fps | 98.8% |
| ADI AR 2209 | <<locked>> | 96% | 46,717 psi | 73% | 2585 fps | 95.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 50,386 psi | 79% | 2559 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 51,488 psi | 81% | 2536 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 44,382 psi | 70% | 2602 fps | 99.4% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 46,601 psi | 73% | 2585 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,973 psi | 64% | 2441 fps | 99.7% |
| Alliant Reloder-15 | <<locked>> | 80% | 43,932 psi | 69% | 2503 fps | 99.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 31,778 psi | 50% | 2310 fps | 95.8% |
| Alliant Reloder-17 | 75.3 gr | 80% | 35,578 psi | 56% | 2425 fps | 98.8% |
| Alliant Reloder-19 | <<locked>> | 96% | 45,977 psi | 72% | 2579 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 86% | 27,818 psi | 44% | 2228 fps | 95.6% |
| Alliant Reloder-25 | <<locked>> | 98% | 35,708 psi | 56% | 2431 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 88% | 31,894 psi | 50% | 2385 fps | 95% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 47,834 psi | 75% | 2566 fps | 99.5% |
| Bofors RP3 | <<locked>> | 80% | 40,944 psi | 64% | 2451 fps | 99.7% |
| Bofors RP7 | <<locked>> | 84% | 41,553 psi | 65% | 2421 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 51,866 psi | 81% | 2543 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 49,763 psi | 78% | 2582 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 41,626 psi | 65% | 2454 fps | 98.1% |
| Hodgdon H414 | <<locked>> | 84% | 38,827 psi | 61% | 2448 fps | 95.2% |
| Hodgdon H4350 | <<locked>> | 86% | 44,918 psi | 70% | 2520 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 48,776 psi | 76% | 2566 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,341 psi | 46% | 2218 fps | 96.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 45,020 psi | 71% | 2546 fps | 100% |
| Hodgdon Superformance | 85.6 gr | 86% | 40,959 psi | 64% | 2510 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,716 psi | 42% | 1463 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 46,775 psi | 73% | 2523 fps | 99.9% |
| IMR 3031 | <<locked>> | 80% | 48,921 psi | 77% | 2552 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,163 psi | 68% | 2451 fps | 99.3% |
| IMR 4166 Enduron | <<locked>> | 80% | 45,542 psi | 71% | 2470 fps | 96.9% |
| IMR 4350 | <<locked>> | 88% | 41,945 psi | 66% | 2451 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 82% | 40,480 psi | 63% | 2405 fps | 95.5% |
| IMR 4831 | <<locked>> | 80% | 30,748 psi | 48% | 2260 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 45,020 psi | 71% | 2530 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 80% | 50,386 psi | 79% | 2559 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 48,008 psi | 75% | 2536 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 47,979 psi | 75% | 2493 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 43,279 psi | 68% | 2454 fps | 99.9% |
| Lovex S065 | <<locked>> | 80% | 35,636 psi | 56% | 2313 fps | 95.5% |
| Lovex S070 | <<locked>> | 84% | 38,377 psi | 60% | 2385 fps | 95.2% |
| Lovex S071 | <<locked>> | 98% | 35,520 psi | 56% | 2365 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 47,398 psi | 74% | 2510 fps | 100% |
| Norma 202 | <<locked>> | 80% | 47,688 psi | 75% | 2510 fps | 100% |
| Norma 203B | <<locked>> | 80% | 43,279 psi | 68% | 2490 fps | 99.5% |
| Norma 204 | <<locked>> | 92% | 47,529 psi | 74% | 2585 fps | 95.6% |
| Norma MRP | <<locked>> | 94% | 39,552 psi | 62% | 2530 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 31,937 psi | 50% | 2300 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 43,149 psi | 68% | 2507 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 84% | 35,607 psi | 56% | 2385 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 50,343 psi | 79% | 2572 fps | 99.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 50,125 psi | 79% | 2589 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,166 psi | 43% | 1499 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 41,858 psi | 66% | 2438 fps | 96.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 46,876 psi | 73% | 2605 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 37,855 psi | 59% | 2484 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 31,386 psi | 49% | 2310 fps | 95.1% |
| ReloadSwiss RS 70 | 78.4 gr | 82% | 33,489 psi | 52% | 2365 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 51,343 psi | 80% | 2539 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 44,976 psi | 70% | 2467 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 38,493 psi | 60% | 2398 fps | 99.3% |
| Rottweil R 904 | <<locked>> | 98% | 51,517 psi | 81% | 2615 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 96% | 44,628 psi | 70% | 2559 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 84% | 41,553 psi | 65% | 2421 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 35,636 psi | 56% | 2313 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 48,008 psi | 75% | 2536 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 43,279 psi | 68% | 2454 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 84% | 38,377 psi | 60% | 2385 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,566 psi | 62% | 2448 fps | 99% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 48,805 psi | 76% | 2444 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 48,878 psi | 77% | 2549 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 46,891 psi | 73% | 2530 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 48,414 psi | 76% | 2457 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,582 psi | 64% | 2336 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 39,697 psi | 62% | 2356 fps | 95.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 44,237 psi | 69% | 2552 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 48,196 psi | 76% | 2457 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 48,689 psi | 76% | 2546 fps | 99.9% |
| Somchem S355 | <<locked>> | 80% | 39,247 psi | 62% | 2402 fps | 99.3% |
| Somchem S365 | <<locked>> | 80% | 28,674 psi | 45% | 2257 fps | 97.9% |
| Somchem S385 | <<locked>> | 94% | 42,554 psi | 67% | 2493 fps | 95.7% |
| Vihtavuori N133 | <<locked>> | 80% | 48,805 psi | 76% | 2444 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 44,802 psi | 70% | 2441 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 45,223 psi | 71% | 2451 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,260 psi | 58% | 2339 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 80% | 33,315 psi | 52% | 2300 fps | 96.1% |
| Vihtavuori N530 | <<locked>> | 80% | 50,676 psi | 79% | 2556 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 43,685 psi | 68% | 2444 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 32,924 psi | 52% | 2303 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 86% | 30,110 psi | 47% | 2300 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,996 psi | 52% | 2277 fps | 98.2% |
| Winchester 748 | <<locked>> | 80% | 50,850 psi | 80% | 2602 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 38,972 psi | 61% | 2451 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 88% | 26,266 psi | 41% | 2247 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 46,514 psi | 73% | 2533 fps | 99.9% |
| Winchester Supreme 780 | <<locked>> | 98% | 45,397 psi | 71% | 2530 fps | 95.1% |
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 104 powders for .375 Rem. Ultra Mag. loaded with the .375 | 270gr | Nosler CT FailSafe. Alliant Reloder-17 delivers the highest muzzle velocity at 2,792 fps; across all powders the maximum-charge window runs from 1,634 fps to 2,792 fps. Accurate 3100 gives the best case fill at 100 %, and 104 of the 104 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 56–90 %, 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 3100, ADI AR 2209, Alliant Power Pro Varmint 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. ReloadSwiss RS 70, Hodgdon Superformance, Alliant Reloder-17 rank at the top here: for .375 Rem. Ultra 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.