Load Specifications
Bullet:.375 | 275gr | SUS-TAC HP
Bullet Manufacturer:SUS-TAC
Bullet Weight:275 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:1:15.5
Load data in caliber .375 Rem. Ultra Mag. with .375 | 275gr | SUS-TAC HP bullet and 106 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% | 55,535 psi | 87% | 2523 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 54,810 psi | 86% | 2549 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 56,260 psi | 88% | 2608 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 56,956 psi | 89% | 2605 fps | 98.3% |
| Accurate 3100ᴾ | <<locked>> | 100% | 45,455 psi | 71% | 2523 fps | 98.1% |
| Accurate 4064 | <<locked>> | 88% | 54,839 psi | 86% | 2595 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 55,100 psi | 86% | 2684 fps | 100% |
| ADI AR 2206H | <<locked>> | 84% | 54,708 psi | 86% | 2625 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 55,869 psi | 88% | 2625 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 53,142 psi | 83% | 2664 fps | 97.1% |
| ADI Benchmark 8208 | <<locked>> | 84% | 57,043 psi | 89% | 2621 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 54,853 psi | 86% | 2549 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 54,563 psi | 86% | 2736 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 52,707 psi | 83% | 2661 fps | 97.1% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 52,707 psi | 83% | 2661 fps | 97.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 56,115 psi | 88% | 2644 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 56,492 psi | 89% | 2667 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 98% | 55,927 psi | 88% | 2733 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 94% | 57,435 psi | 90% | 2762 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 51,924 psi | 81% | 2651 fps | 97% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,989 psi | 67% | 2549 fps | 99.9% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 37,956 psi | 59% | 2461 fps | 96.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 48,733 psi | 76% | 2713 fps | 99.7% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 54,491 psi | 85% | 2638 fps | 100% |
| Bofors RP3 | <<locked>> | 90% | 57,043 psi | 89% | 2661 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 56,666 psi | 89% | 2638 fps | 98.5% |
| Hodgdon Benchmark | <<locked>> | 82% | 55,056 psi | 86% | 2556 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 56,782 psi | 89% | 2651 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 57,638 psi | 90% | 2674 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 96% | 57,696 psi | 90% | 2730 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 92% | 54,520 psi | 85% | 2644 fps | 97.7% |
| Hodgdon H4895 | <<locked>> | 84% | 55,303 psi | 87% | 2631 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 56,101 psi | 88% | 2661 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 55,143 psi | 86% | 2664 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 54,447 psi | 85% | 2713 fps | 98.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,897 psi | 56% | 1617 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 56,434 psi | 88% | 2635 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 55,593 psi | 87% | 2612 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 55,405 psi | 87% | 2612 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 54,940 psi | 86% | 2592 fps | 98.7% |
| IMR 4350 | <<locked>> | 98% | 57,203 psi | 90% | 2664 fps | 98.7% |
| IMR 4451 Enduron | <<locked>> | 92% | 55,013 psi | 86% | 2618 fps | 98.7% |
| IMR 4831 | <<locked>> | 98% | 55,506 psi | 87% | 2674 fps | 100% |
| IMR 4895 | <<locked>> | 86% | 54,549 psi | 85% | 2648 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 57,043 psi | 89% | 2621 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 54,839 psi | 86% | 2602 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 57,319 psi | 90% | 2598 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 55,230 psi | 87% | 2605 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 54,592 psi | 86% | 2615 fps | 99.5% |
| Lovex S070 | <<locked>> | 96% | 55,753 psi | 87% | 2651 fps | 99% |
| Lovex S071ᴾ | <<locked>> | 100% | 37,695 psi | 59% | 2385 fps | 96.1% |
| Norma 201 | <<locked>> | 86% | 56,898 psi | 89% | 2618 fps | 100% |
| Norma 202 | <<locked>> | 86% | 57,508 psi | 90% | 2615 fps | 100% |
| Norma 203B | <<locked>> | 88% | 55,738 psi | 87% | 2654 fps | 100% |
| Norma 204 | <<locked>> | 96% | 54,360 psi | 85% | 2664 fps | 97.2% |
| Norma MRPᴾ | <<locked>> | 100% | 48,283 psi | 76% | 2671 fps | 97.8% |
| Norma URP | <<locked>> | 98% | 57,493 psi | 90% | 2717 fps | 100% |
| Ramshot Big Game | <<locked>> | 88% | 56,594 psi | 89% | 2677 fps | 100% |
| Ramshot Hunter | <<locked>> | 98% | 56,362 psi | 88% | 2720 fps | 99.5% |
| Ramshot TAC | <<locked>> | 84% | 57,305 psi | 90% | 2644 fps | 99.7% |
| Ramshot Wild Boar | <<locked>> | 84% | 57,217 psi | 90% | 2657 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,318 psi | 57% | 1654 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 54,317 psi | 85% | 2612 fps | 99% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 57,334 psi | 90% | 2730 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 57,000 psi | 89% | 2759 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 54,868 psi | 86% | 2703 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 53,867 psi | 84% | 2730 fps | 99.8% |
| Rottweil R 901 | <<locked>> | 82% | 54,433 psi | 85% | 2552 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 57,392 psi | 90% | 2615 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 56,869 psi | 89% | 2654 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 54,868 psi | 86% | 2638 fps | 96.2% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 50,966 psi | 80% | 2638 fps | 97% |
| Rottweil R 907 | <<locked>> | 94% | 56,666 psi | 89% | 2638 fps | 98.5% |
| Shooters World Long Rifle | <<locked>> | 94% | 54,592 psi | 86% | 2615 fps | 99.5% |
| Shooters World Match Rifle | <<locked>> | 84% | 54,839 psi | 86% | 2602 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 55,230 psi | 87% | 2605 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 55,753 psi | 87% | 2651 fps | 99% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 54,940 psi | 86% | 2664 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 56,014 psi | 88% | 2625 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 56,565 psi | 89% | 2644 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 54,795 psi | 86% | 2513 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 55,245 psi | 87% | 2513 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 54,708 psi | 86% | 2569 fps | 98.7% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 50,473 psi | 79% | 2631 fps | 96.9% |
| Somchem S335 | <<locked>> | 86% | 57,566 psi | 90% | 2552 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 55,535 psi | 87% | 2615 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 56,927 psi | 89% | 2651 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 56,057 psi | 88% | 2717 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 51,663 psi | 81% | 2618 fps | 97.9% |
| Vihtavuori N130 | <<locked>> | 82% | 57,711 psi | 90% | 2513 fps | 100% |
| Vihtavuori N133 | <<locked>> | 84% | 55,143 psi | 86% | 2497 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 57,464 psi | 90% | 2575 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 54,549 psi | 85% | 2549 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 54,926 psi | 86% | 2585 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 56,362 psi | 88% | 2664 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 44,469 psi | 70% | 2487 fps | 95.8% |
| Vihtavuori N530 | <<locked>> | 84% | 57,624 psi | 90% | 2621 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 56,246 psi | 88% | 2592 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 55,303 psi | 87% | 2671 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 47,776 psi | 75% | 2618 fps | 99.8% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 56,536 psi | 89% | 2638 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 54,201 psi | 85% | 2618 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 54,201 psi | 85% | 2684 fps | 98.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,653 psi | 61% | 2579 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 86% | 56,797 psi | 89% | 2651 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 48,559 psi | 76% | 2556 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% | 52,243 psi | 82% | 2484 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 45,063 psi | 71% | 2421 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 52,489 psi | 82% | 2562 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 43,758 psi | 69% | 2405 fps | 95.7% |
| Accurate 3100 | <<locked>> | 92% | 34,635 psi | 54% | 2326 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 42,627 psi | 67% | 2421 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 31,691 psi | 50% | 2277 fps | 95.9% |
| ADI AR 2206H | <<locked>> | 80% | 48,312 psi | 76% | 2533 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 80% | 41,031 psi | 64% | 2395 fps | 98.9% |
| ADI AR 2209 | <<locked>> | 96% | 46,514 psi | 73% | 2559 fps | 95.5% |
| ADI Benchmark 8208 | <<locked>> | 80% | 50,372 psi | 79% | 2533 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 51,416 psi | 81% | 2507 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 44,309 psi | 69% | 2575 fps | 99.4% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 46,427 psi | 73% | 2559 fps | 95.6% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 46,427 psi | 73% | 2559 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,959 psi | 64% | 2418 fps | 99.7% |
| Alliant Reloder-15 | <<locked>> | 80% | 43,903 psi | 69% | 2477 fps | 99.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 31,763 psi | 50% | 2287 fps | 95.9% |
| Alliant Reloder-17 | 74.1 gr | 80% | 35,476 psi | 56% | 2402 fps | 98.8% |
| Alliant Reloder-19 | <<locked>> | 96% | 45,803 psi | 72% | 2552 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 86% | 27,760 psi | 44% | 2205 fps | 95.8% |
| Alliant Reloder-25 | <<locked>> | 98% | 35,607 psi | 56% | 2408 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 88% | 31,836 psi | 50% | 2365 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 47,630 psi | 75% | 2536 fps | 99.5% |
| Bofors RP3 | <<locked>> | 80% | 40,799 psi | 64% | 2425 fps | 99.7% |
| Bofors RP7 | <<locked>> | 84% | 41,437 psi | 65% | 2398 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 51,866 psi | 81% | 2516 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 49,719 psi | 78% | 2556 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 41,524 psi | 65% | 2428 fps | 98.2% |
| Hodgdon H414 | <<locked>> | 84% | 38,653 psi | 61% | 2421 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 86% | 44,904 psi | 70% | 2493 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 48,791 psi | 76% | 2539 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,298 psi | 46% | 2198 fps | 96.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 44,918 psi | 70% | 2516 fps | 100% |
| Hodgdon Superformance | 84.2 gr | 86% | 40,785 psi | 64% | 2484 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,701 psi | 42% | 1444 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 46,615 psi | 73% | 2493 fps | 99.9% |
| IMR 3031 | <<locked>> | 80% | 48,834 psi | 77% | 2526 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,062 psi | 67% | 2425 fps | 99.3% |
| IMR 4166 Enduron | <<locked>> | 80% | 45,527 psi | 71% | 2448 fps | 97% |
| IMR 4350 | <<locked>> | 88% | 41,814 psi | 66% | 2425 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 82% | 40,495 psi | 63% | 2382 fps | 95.6% |
| IMR 4831 | <<locked>> | 80% | 30,719 psi | 48% | 2238 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 45,020 psi | 71% | 2503 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 80% | 50,372 psi | 79% | 2533 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 47,863 psi | 75% | 2507 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 47,732 psi | 75% | 2467 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 43,076 psi | 68% | 2425 fps | 99.9% |
| Lovex S065 | <<locked>> | 80% | 35,462 psi | 56% | 2283 fps | 95.6% |
| Lovex S070 | <<locked>> | 84% | 38,290 psi | 60% | 2362 fps | 95.3% |
| Lovex S071 | <<locked>> | 98% | 35,447 psi | 56% | 2343 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 47,210 psi | 74% | 2484 fps | 100% |
| Norma 202 | <<locked>> | 80% | 47,659 psi | 75% | 2484 fps | 100% |
| Norma 203B | <<locked>> | 80% | 43,294 psi | 68% | 2467 fps | 99.6% |
| Norma 204 | <<locked>> | 92% | 47,369 psi | 74% | 2556 fps | 95.7% |
| Norma MRP | <<locked>> | 94% | 39,262 psi | 62% | 2500 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 31,923 psi | 50% | 2277 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 43,105 psi | 68% | 2480 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 84% | 35,476 psi | 56% | 2359 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 50,299 psi | 79% | 2546 fps | 99.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 50,038 psi | 78% | 2562 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,151 psi | 43% | 1480 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 41,756 psi | 65% | 2411 fps | 96.8% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 46,789 psi | 73% | 2579 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 37,782 psi | 59% | 2457 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 31,314 psi | 49% | 2287 fps | 95.2% |
| ReloadSwiss RS 70 | 77.2 gr | 82% | 33,489 psi | 52% | 2343 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 51,227 psi | 80% | 2510 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 44,918 psi | 70% | 2438 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 38,450 psi | 60% | 2372 fps | 99.3% |
| Rottweil R 904 | <<locked>> | 98% | 51,343 psi | 80% | 2585 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 96% | 44,614 psi | 70% | 2536 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 84% | 41,437 psi | 65% | 2398 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 35,462 psi | 56% | 2283 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 47,863 psi | 75% | 2507 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 43,076 psi | 68% | 2425 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 84% | 38,290 psi | 60% | 2362 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,450 psi | 62% | 2421 fps | 99% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 48,805 psi | 76% | 2523 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 46,760 psi | 73% | 2503 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 48,327 psi | 76% | 2428 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,480 psi | 63% | 2310 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 39,639 psi | 62% | 2329 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 44,193 psi | 69% | 2530 fps | 95.3% |
| Somchem S335 | <<locked>> | 80% | 47,979 psi | 75% | 2428 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 48,443 psi | 76% | 2516 fps | 99.9% |
| Somchem S355 | <<locked>> | 80% | 39,073 psi | 61% | 2375 fps | 99.3% |
| Somchem S365 | <<locked>> | 80% | 28,660 psi | 45% | 2234 fps | 98% |
| Somchem S385 | <<locked>> | 94% | 42,337 psi | 66% | 2467 fps | 95.7% |
| Vihtavuori N130 | <<locked>> | 80% | 54,331 psi | 85% | 2474 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 48,747 psi | 76% | 2418 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 44,686 psi | 70% | 2411 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 45,179 psi | 71% | 2425 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,217 psi | 58% | 2316 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 80% | 33,301 psi | 52% | 2277 fps | 96.2% |
| Vihtavuori N165 | <<locked>> | 98% | 41,742 psi | 65% | 2441 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 50,502 psi | 79% | 2526 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 43,584 psi | 68% | 2418 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 32,793 psi | 51% | 2277 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 86% | 30,037 psi | 47% | 2277 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,866 psi | 52% | 2254 fps | 98.2% |
| Winchester 748 | <<locked>> | 80% | 50,749 psi | 80% | 2572 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 38,798 psi | 61% | 2425 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 88% | 26,208 psi | 41% | 2224 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 46,398 psi | 73% | 2507 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 45,121 psi | 71% | 2503 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 106 powders for .375 Rem. Ultra Mag. loaded with the .375 | 275gr | SUS-TAC HP. Alliant Reloder-17 delivers the highest muzzle velocity at 2,762 fps; across all powders the maximum-charge window runs from 1,617 fps to 2,762 fps. Accurate 3100 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 56–90 %, leaving at least 10 % headroom. The 275.0 gr projectile in 0.375" calls for a 1:15.5 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 | 275gr | SUS-TAC HP 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.