Load Specifications
Bullet Manufacturer:Woodleigh
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
Load data in caliber .375 Rem. Ultra Mag. with .375 | 270gr | Woodleigh RN SN bullet and 104 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-17, ReloadSwiss RS 60 and Winchester 760.
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 2495 | <<locked>> | 84% | 56,333 psi | 88% | 2612 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 54,114 psi | 85% | 2625 fps | 98.4% |
| Accurate 3100ᴾ | <<locked>> | 100% | 51,285 psi | 80% | 2657 fps | 99.3% |
| Accurate 4064 | <<locked>> | 86% | 56,608 psi | 89% | 2664 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 57,261 psi | 90% | 2759 fps | 100% |
| ADI AR 2206H | <<locked>> | 82% | 55,651 psi | 87% | 2690 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 56,753 psi | 89% | 2694 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 54,694 psi | 86% | 2746 fps | 97.9% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 52,315 psi | 82% | 2733 fps | 96.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 56,057 psi | 88% | 2812 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 54,607 psi | 86% | 2743 fps | 98% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 57,421 psi | 90% | 2713 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 54,230 psi | 85% | 2687 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 54,273 psi | 85% | 2762 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 55,579 psi | 87% | 2785 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 57,537 psi | 90% | 2789 fps | 98.5% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 50,937 psi | 80% | 2733 fps | 97.6% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 48,153 psi | 75% | 2680 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,105 psi | 66% | 2602 fps | 98.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 55,274 psi | 87% | 2858 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 55,637 psi | 87% | 2707 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 46,717 psi | 73% | 2661 fps | 96.4% |
| Bofors RP3 | <<locked>> | 86% | 54,795 psi | 86% | 2684 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 50,937 psi | 80% | 2733 fps | 97.6% |
| Bofors RP7 | <<locked>> | 90% | 54,418 psi | 85% | 2667 fps | 98.6% |
| Hodgdon H380 | <<locked>> | 86% | 55,230 psi | 87% | 2697 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 92% | 55,854 psi | 88% | 2759 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 90% | 55,825 psi | 87% | 2723 fps | 98.4% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 56,231 psi | 88% | 2740 fps | 96.4% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 54,897 psi | 86% | 2723 fps | 96.1% |
| Hodgdon H4895 | <<locked>> | 82% | 56,275 psi | 88% | 2700 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 54,534 psi | 85% | 2690 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 56,521 psi | 89% | 2733 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 56,115 psi | 88% | 2792 fps | 99.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,114 psi | 57% | 1673 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 57,348 psi | 90% | 2700 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 56,884 psi | 89% | 2674 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 56,231 psi | 88% | 2677 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 55,506 psi | 87% | 2661 fps | 99.1% |
| IMR 4350 | <<locked>> | 94% | 55,114 psi | 86% | 2694 fps | 98.8% |
| IMR 4451 Enduron | <<locked>> | 90% | 56,086 psi | 88% | 2694 fps | 99.2% |
| IMR 4831 | <<locked>> | 96% | 57,667 psi | 90% | 2753 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 55,608 psi | 87% | 2713 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 54,317 psi | 85% | 2680 fps | 96.2% |
| Lovex D073.6 | <<locked>> | 82% | 55,970 psi | 88% | 2661 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 54,534 psi | 85% | 2618 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 56,405 psi | 88% | 2671 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 55,956 psi | 88% | 2687 fps | 99.8% |
| Lovex S070 | <<locked>> | 94% | 57,203 psi | 90% | 2723 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 42,583 psi | 67% | 2520 fps | 97.9% |
| Norma 201 | <<locked>> | 82% | 54,302 psi | 85% | 2635 fps | 100% |
| Norma 202 | <<locked>> | 82% | 55,085 psi | 86% | 2635 fps | 100% |
| Norma 203B | <<locked>> | 86% | 57,116 psi | 90% | 2723 fps | 100% |
| Norma 204 | <<locked>> | 94% | 55,927 psi | 88% | 2743 fps | 98% |
| Norma MRPᴾ | <<locked>> | 100% | 54,114 psi | 85% | 2812 fps | 99.2% |
| Norma URP | <<locked>> | 94% | 55,854 psi | 88% | 2746 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 54,259 psi | 85% | 2697 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 49,980 psi | 78% | 2717 fps | 96.1% |
| Ramshot Hunter | <<locked>> | 94% | 54,636 psi | 86% | 2746 fps | 99.6% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 44,469 psi | 70% | 2598 fps | 96.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,854 psi | 58% | 1716 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 55,332 psi | 87% | 2684 fps | 99.5% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 55,100 psi | 86% | 2753 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 55,187 psi | 86% | 2782 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 57,130 psi | 90% | 2782 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 55,724 psi | 87% | 2808 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 40,944 psi | 64% | 2608 fps | 96.4% |
| Rottweil R 902 | <<locked>> | 84% | 55,056 psi | 86% | 2638 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 54,810 psi | 86% | 2677 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 56,521 psi | 89% | 2720 fps | 97.2% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 56,579 psi | 89% | 2772 fps | 98.4% |
| Rottweil R 907 | <<locked>> | 90% | 54,418 psi | 85% | 2667 fps | 98.6% |
| Shooters World Long Rifle | <<locked>> | 92% | 55,956 psi | 88% | 2687 fps | 99.8% |
| Shooters World Match Rifle | <<locked>> | 82% | 55,970 psi | 88% | 2661 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 56,405 psi | 88% | 2671 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 57,203 psi | 90% | 2723 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 56,550 psi | 89% | 2733 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 56,927 psi | 89% | 2694 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 57,638 psi | 90% | 2710 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 55,187 psi | 86% | 2572 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 56,159 psi | 88% | 2572 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 55,941 psi | 88% | 2644 fps | 99.2% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 56,072 psi | 88% | 2766 fps | 98.4% |
| Somchem S335 | <<locked>> | 82% | 54,853 psi | 86% | 2569 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 56,623 psi | 89% | 2680 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 54,911 psi | 86% | 2677 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 54,752 psi | 86% | 2661 fps | 96% |
| Somchem S365 | <<locked>> | 96% | 54,998 psi | 86% | 2746 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 57,319 psi | 90% | 2749 fps | 99.1% |
| Vihtavuori N133 | <<locked>> | 82% | 55,680 psi | 87% | 2556 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 55,317 psi | 87% | 2598 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 55,535 psi | 87% | 2612 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 56,304 psi | 88% | 2651 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 54,592 psi | 86% | 2694 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 49,603 psi | 78% | 2621 fps | 97.6% |
| Vihtavuori N540 | <<locked>> | 86% | 57,334 psi | 90% | 2654 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 57,261 psi | 90% | 2746 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 53,882 psi | 84% | 2749 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 54,549 psi | 85% | 2799 fps | 96.5% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 54,230 psi | 85% | 2661 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 56,014 psi | 88% | 2759 fps | 99.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 43,453 psi | 68% | 2726 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 54,099 psi | 85% | 2667 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 53,882 psi | 84% | 2694 fps | 97.8% |
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 2495 | <<locked>> | 80% | 49,385 psi | 77% | 2526 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,427 psi | 74% | 2520 fps | 97.2% |
| Accurate 3100 | <<locked>> | 88% | 34,026 psi | 53% | 2349 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 46,746 psi | 73% | 2530 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 35,302 psi | 55% | 2395 fps | 97.5% |
| ADI AR 2206H | <<locked>> | 80% | 52,170 psi | 82% | 2641 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 44,309 psi | 69% | 2503 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 92% | 44,976 psi | 70% | 2585 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 98% | 49,023 psi | 77% | 2680 fps | 95.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 48,573 psi | 76% | 2697 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 42,134 psi | 66% | 2533 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,744 psi | 70% | 2530 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 47,732 psi | 75% | 2589 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 34,737 psi | 54% | 2405 fps | 97.6% |
| Alliant Reloder-17 | 82.1 gr | 80% | 39,233 psi | 61% | 2523 fps | 99.7% |
| Alliant Reloder-19 | <<locked>> | 92% | 44,483 psi | 70% | 2579 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 94% | 41,756 psi | 65% | 2569 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 82% | 27,006 psi | 42% | 2224 fps | 95.9% |
| Alliant Reloder-25 | <<locked>> | 92% | 32,692 psi | 51% | 2385 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 84% | 30,937 psi | 48% | 2385 fps | 95.3% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 52,011 psi | 82% | 2654 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 43,859 psi | 69% | 2608 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 44,933 psi | 70% | 2539 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 41,756 psi | 65% | 2569 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 39,711 psi | 62% | 2415 fps | 95.4% |
| Hodgdon H380 | <<locked>> | 80% | 45,295 psi | 71% | 2543 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 80% | 37,391 psi | 59% | 2438 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 82% | 43,149 psi | 68% | 2513 fps | 95.7% |
| Hodgdon H4831 | <<locked>> | 98% | 52,504 psi | 82% | 2684 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 98% | 51,474 psi | 81% | 2671 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 52,750 psi | 83% | 2651 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,227 psi | 51% | 2310 fps | 98.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,313 psi | 77% | 2635 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 39,117 psi | 61% | 2500 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,079 psi | 42% | 1499 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,531 psi | 79% | 2605 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 53,287 psi | 84% | 2631 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,601 psi | 73% | 2536 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,965 psi | 77% | 2559 fps | 98.2% |
| IMR 4350 | <<locked>> | 84% | 40,263 psi | 63% | 2444 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,133 psi | 64% | 2444 fps | 96.3% |
| IMR 4831 | <<locked>> | 80% | 34,084 psi | 53% | 2356 fps | 97.2% |
| IMR 4895 | <<locked>> | 80% | 48,979 psi | 77% | 2618 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 51,068 psi | 80% | 2628 fps | 95.4% |
| Lovex D073.6 | <<locked>> | 80% | 52,402 psi | 82% | 2615 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,329 psi | 80% | 2572 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 46,847 psi | 73% | 2536 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,595 psi | 60% | 2398 fps | 97.1% |
| Lovex S070 | <<locked>> | 80% | 36,912 psi | 58% | 2379 fps | 95.4% |
| Lovex S071 | <<locked>> | 94% | 34,998 psi | 55% | 2372 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 51,053 psi | 80% | 2592 fps | 100% |
| Norma 202 | <<locked>> | 80% | 51,750 psi | 81% | 2589 fps | 100% |
| Norma 203B | <<locked>> | 80% | 47,108 psi | 74% | 2579 fps | 100% |
| Norma 204 | <<locked>> | 88% | 45,687 psi | 72% | 2579 fps | 95.8% |
| Norma MRP | <<locked>> | 90% | 38,261 psi | 60% | 2526 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 35,317 psi | 55% | 2395 fps | 97.4% |
| Ramshot Big Game | <<locked>> | 80% | 47,253 psi | 74% | 2595 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 46,572 psi | 73% | 2657 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 34,272 psi | 54% | 2375 fps | 95.1% |
| Ramshot Magnum | <<locked>> | 98% | 41,336 psi | 65% | 2539 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,514 psi | 43% | 1535 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,498 psi | 71% | 2530 fps | 98.1% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 51,488 psi | 81% | 2700 fps | 100% |
| ReloadSwiss RS 60 | 82.1 gr | 80% | 41,713 psi | 65% | 2579 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,070 psi | 55% | 2411 fps | 97.1% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 34,301 psi | 54% | 2411 fps | 96.3% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 38,189 psi | 60% | 2543 fps | 95.2% |
| Rottweil R 902 | <<locked>> | 80% | 48,617 psi | 76% | 2546 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 42,264 psi | 66% | 2487 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 94% | 49,632 psi | 78% | 2615 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 92% | 43,424 psi | 68% | 2562 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 39,711 psi | 62% | 2415 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,595 psi | 60% | 2398 fps | 97.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 52,402 psi | 82% | 2615 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 46,847 psi | 73% | 2536 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 36,912 psi | 58% | 2379 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,323 psi | 68% | 2536 fps | 99.7% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 53,113 psi | 83% | 2641 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 50,720 psi | 79% | 2615 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 52,011 psi | 82% | 2530 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,816 psi | 69% | 2408 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 37,855 psi | 59% | 2346 fps | 95.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 43,018 psi | 67% | 2556 fps | 95.5% |
| Somchem S335 | <<locked>> | 80% | 51,648 psi | 81% | 2526 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 52,910 psi | 83% | 2631 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 42,641 psi | 67% | 2487 fps | 99.8% |
| Somchem S361 | <<locked>> | 94% | 51,169 psi | 80% | 2605 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 31,763 psi | 50% | 2352 fps | 99.2% |
| Somchem S385 | <<locked>> | 88% | 38,711 psi | 61% | 2444 fps | 95.1% |
| Vihtavuori N133 | <<locked>> | 80% | 52,489 psi | 82% | 2516 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 48,776 psi | 76% | 2516 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 49,052 psi | 77% | 2526 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,741 psi | 64% | 2425 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 36,637 psi | 57% | 2392 fps | 97.7% |
| Vihtavuori N165 | <<locked>> | 94% | 40,553 psi | 64% | 2467 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 47,297 psi | 74% | 2520 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,158 psi | 57% | 2392 fps | 97.4% |
| Vihtavuori N555 | <<locked>> | 80% | 27,615 psi | 43% | 2247 fps | 95.1% |
| Vihtavuori N560 | <<locked>> | 98% | 51,024 psi | 80% | 2743 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,013 psi | 56% | 2365 fps | 99.3% |
| Winchester 760 | 80.4 gr | 80% | 37,521 psi | 59% | 2441 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 84% | 25,469 psi | 40% | 2247 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,691 psi | 79% | 2621 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 43,700 psi | 68% | 2530 fps | 95.4% |
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 | Woodleigh RN SN. Alliant Reloder-26 delivers the highest muzzle velocity at 2,858 fps; across all powders the maximum-charge window runs from 1,673 fps to 2,858 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 57–90 %, leaving at least 10 % headroom. Accurate 3100, ADI AR 2213, Alliant Reloder-19 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 Reloder-17, ReloadSwiss RS 60, Winchester 760 rank at the top here: for .375 Rem. Ultra Mag. with the .375 | 270gr | Woodleigh RN SN 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.