Load Specifications
Bullet Manufacturer:Frontier Bullets
Bullet Weight:300 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:1:6.0
Load data in caliber .375 Rem. Ultra Mag. with .375 | 300gr | Frontier PH PHL bullet and 109 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Alliant Reloder-26 and Alliant Reloder-16.
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% | 56,898 psi | 89% | 2470 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 54,694 psi | 86% | 2490 fps | 98.9% |
| Accurate 3100ᴾ | <<locked>> | 100% | 51,866 psi | 81% | 2530 fps | 99.7% |
| Accurate 4064 | <<locked>> | 86% | 57,232 psi | 90% | 2520 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 54,215 psi | 85% | 2575 fps | 100% |
| Accurate High Countryᴾ | <<locked>> | 100% | 56,536 psi | 89% | 2707 fps | 98.2% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 53,664 psi | 84% | 2651 fps | 96.4% |
| ADI AR 2206H | <<locked>> | 82% | 56,130 psi | 88% | 2546 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 57,435 psi | 90% | 2552 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 55,085 psi | 86% | 2612 fps | 98.6% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 52,924 psi | 83% | 2605 fps | 97.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 56,811 psi | 89% | 2667 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 55,100 psi | 86% | 2608 fps | 98.6% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 55,100 psi | 86% | 2608 fps | 98.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 54,607 psi | 86% | 2530 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 54,940 psi | 86% | 2549 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 54,795 psi | 86% | 2621 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 56,333 psi | 88% | 2648 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 54,360 psi | 85% | 2602 fps | 98.5% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 51,590 psi | 81% | 2605 fps | 98.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 48,646 psi | 76% | 2546 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,511 psi | 67% | 2480 fps | 99.2% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 55,767 psi | 87% | 2720 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 56,115 psi | 88% | 2566 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 47,297 psi | 74% | 2536 fps | 97.3% |
| Bofors RP3 | <<locked>> | 86% | 55,347 psi | 87% | 2543 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 51,590 psi | 81% | 2605 fps | 98.3% |
| Bofors RP7 | <<locked>> | 90% | 54,853 psi | 86% | 2530 fps | 99.1% |
| Hodgdon H380 | <<locked>> | 86% | 55,883 psi | 88% | 2559 fps | 100% |
| Hodgdon H414 | <<locked>> | 92% | 56,304 psi | 88% | 2621 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 90% | 56,275 psi | 88% | 2582 fps | 98.9% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 56,579 psi | 89% | 2605 fps | 97.1% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 55,550 psi | 87% | 2592 fps | 96.9% |
| Hodgdon H4895 | <<locked>> | 82% | 56,797 psi | 89% | 2556 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 55,288 psi | 87% | 2552 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 57,145 psi | 90% | 2589 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 41,597 psi | 65% | 2503 fps | 96.4% |
| Hodgdon Superformance | <<locked>> | 92% | 56,768 psi | 89% | 2657 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,376 psi | 57% | 1568 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 54,404 psi | 85% | 2513 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 57,522 psi | 90% | 2530 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 56,898 psi | 89% | 2536 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 56,057 psi | 88% | 2523 fps | 99.5% |
| IMR 4350 | <<locked>> | 94% | 55,622 psi | 87% | 2559 fps | 99.3% |
| IMR 4451 Enduron | <<locked>> | 90% | 56,623 psi | 89% | 2556 fps | 99.5% |
| IMR 4831 | <<locked>> | 94% | 54,549 psi | 85% | 2566 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 56,391 psi | 88% | 2572 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 54,665 psi | 86% | 2546 fps | 96.9% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 50,357 psi | 79% | 2579 fps | 96.6% |
| Lovex D073.6 | <<locked>> | 82% | 56,637 psi | 89% | 2523 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 55,085 psi | 86% | 2477 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 57,101 psi | 89% | 2530 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 56,449 psi | 88% | 2549 fps | 99.9% |
| Lovex S070 | <<locked>> | 92% | 54,215 psi | 85% | 2539 fps | 99.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 43,018 psi | 67% | 2398 fps | 98.6% |
| Norma 201 | <<locked>> | 82% | 54,940 psi | 86% | 2497 fps | 100% |
| Norma 202 | <<locked>> | 82% | 55,579 psi | 87% | 2490 fps | 100% |
| Norma 203B | <<locked>> | 86% | 57,682 psi | 90% | 2579 fps | 100% |
| Norma 204 | <<locked>> | 94% | 56,521 psi | 89% | 2608 fps | 98.6% |
| Norma MRPᴾ | <<locked>> | 100% | 54,636 psi | 86% | 2677 fps | 99.6% |
| Norma URP | <<locked>> | 94% | 56,550 psi | 89% | 2608 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 54,911 psi | 86% | 2559 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 50,357 psi | 79% | 2589 fps | 97% |
| Ramshot Hunter | <<locked>> | 94% | 55,274 psi | 87% | 2612 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 44,889 psi | 70% | 2480 fps | 97.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,869 psi | 58% | 1604 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 55,724 psi | 87% | 2543 fps | 99.7% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 55,840 psi | 88% | 2608 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 55,666 psi | 87% | 2638 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 53,954 psi | 85% | 2595 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 56,333 psi | 88% | 2671 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 41,336 psi | 65% | 2493 fps | 97.5% |
| Rottweil R 902 | <<locked>> | 84% | 55,593 psi | 87% | 2497 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 55,419 psi | 87% | 2539 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 57,043 psi | 89% | 2585 fps | 97.9% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 57,319 psi | 90% | 2638 fps | 99% |
| Rottweil R 907 | <<locked>> | 90% | 54,853 psi | 86% | 2530 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 92% | 56,449 psi | 88% | 2549 fps | 99.9% |
| Shooters World Match Rifle | <<locked>> | 82% | 56,637 psi | 89% | 2523 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 57,101 psi | 89% | 2530 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 54,215 psi | 85% | 2539 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 56,971 psi | 89% | 2592 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 57,537 psi | 90% | 2556 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 54,708 psi | 86% | 2523 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 55,869 psi | 88% | 2431 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 56,579 psi | 89% | 2431 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 56,275 psi | 88% | 2507 fps | 99.5% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 56,811 psi | 89% | 2635 fps | 98.9% |
| Somchem S335 | <<locked>> | 82% | 55,477 psi | 87% | 2428 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 57,087 psi | 89% | 2539 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 55,506 psi | 87% | 2536 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 55,143 psi | 86% | 2530 fps | 96.8% |
| Somchem S365 | <<locked>> | 96% | 55,477 psi | 87% | 2605 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 54,259 psi | 85% | 2566 fps | 99.1% |
| Vihtavuori N133 | <<locked>> | 82% | 56,391 psi | 88% | 2415 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 55,912 psi | 88% | 2457 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 56,159 psi | 88% | 2470 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 56,710 psi | 89% | 2510 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 55,187 psi | 86% | 2556 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 50,096 psi | 79% | 2497 fps | 98.3% |
| Vihtavuori N540 | <<locked>> | 84% | 54,302 psi | 85% | 2470 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 57,696 psi | 90% | 2605 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 54,476 psi | 85% | 2612 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 55,056 psi | 86% | 2667 fps | 97.3% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 54,636 psi | 86% | 2523 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 56,521 psi | 89% | 2625 fps | 99.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 43,801 psi | 69% | 2595 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 54,737 psi | 86% | 2530 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 54,360 psi | 85% | 2559 fps | 98.4% |
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% | 50,024 psi | 78% | 2388 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,993 psi | 75% | 2395 fps | 98% |
| Accurate 3100 | <<locked>> | 86% | 32,198 psi | 50% | 2192 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 47,340 psi | 74% | 2395 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 35,839 psi | 56% | 2280 fps | 98.4% |
| Accurate High Country | <<locked>> | 92% | 42,743 psi | 67% | 2490 fps | 95.1% |
| Accurate MAGPRO | <<locked>> | 98% | 50,067 psi | 78% | 2598 fps | 95.6% |
| ADI AR 2206H | <<locked>> | 80% | 52,794 psi | 83% | 2503 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 44,918 psi | 70% | 2375 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 39,958 psi | 63% | 2362 fps | 95% |
| ADI AR 2213 | <<locked>> | 96% | 46,311 psi | 73% | 2500 fps | 95.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 49,298 psi | 77% | 2566 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 39,943 psi | 63% | 2362 fps | 95.1% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 39,943 psi | 63% | 2362 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 45,237 psi | 71% | 2398 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 48,312 psi | 76% | 2457 fps | 100% |
| Alliant Reloder-16 | 71.1 gr | 80% | 35,172 psi | 55% | 2290 fps | 98.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 39,726 psi | 62% | 2402 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 39,494 psi | 62% | 2356 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 92% | 39,581 psi | 62% | 2398 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 25,730 psi | 40% | 2077 fps | 96.2% |
| Alliant Reloder-25 | <<locked>> | 90% | 31,053 psi | 49% | 2228 fps | 95.3% |
| Alliant Reloder-26 | 80.4 gr | 82% | 29,167 psi | 46% | 2221 fps | 95.5% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 52,605 psi | 82% | 2520 fps | 100% |
| Bofors RP15 | <<locked>> | 96% | 41,626 psi | 65% | 2438 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 45,440 psi | 71% | 2408 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 39,581 psi | 62% | 2398 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 40,234 psi | 63% | 2297 fps | 96.4% |
| Hodgdon H380 | <<locked>> | 80% | 45,861 psi | 72% | 2415 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 80% | 37,826 psi | 59% | 2320 fps | 96.4% |
| Hodgdon H4350 | <<locked>> | 80% | 40,872 psi | 64% | 2339 fps | 95.8% |
| Hodgdon H4831 | <<locked>> | 96% | 49,501 psi | 78% | 2503 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 96% | 48,588 psi | 76% | 2490 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 53,345 psi | 84% | 2510 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,663 psi | 51% | 2198 fps | 98.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 50,024 psi | 78% | 2497 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 38,943 psi | 61% | 2444 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 36,767 psi | 58% | 2326 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,108 psi | 42% | 1401 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 51,082 psi | 80% | 2467 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 53,896 psi | 84% | 2487 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 47,239 psi | 74% | 2405 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 49,429 psi | 77% | 2428 fps | 98.8% |
| IMR 4350 | <<locked>> | 80% | 35,868 psi | 56% | 2231 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,524 psi | 65% | 2320 fps | 97.2% |
| IMR 4831 | <<locked>> | 80% | 34,548 psi | 54% | 2241 fps | 98.1% |
| IMR 4895 | <<locked>> | 80% | 49,545 psi | 78% | 2480 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 48,298 psi | 76% | 2454 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 98% | 47,021 psi | 74% | 2526 fps | 95.8% |
| Lovex D073.6 | <<locked>> | 80% | 52,953 psi | 83% | 2477 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,793 psi | 81% | 2434 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 47,355 psi | 74% | 2402 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 39,088 psi | 61% | 2277 fps | 97.9% |
| Lovex S070 | <<locked>> | 80% | 37,318 psi | 58% | 2260 fps | 96.4% |
| Lovex S071 | <<locked>> | 90% | 31,256 psi | 49% | 2169 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 51,634 psi | 81% | 2454 fps | 100% |
| Norma 202 | <<locked>> | 80% | 52,214 psi | 82% | 2448 fps | 100% |
| Norma 203B | <<locked>> | 80% | 47,659 psi | 75% | 2444 fps | 100% |
| Norma 204 | <<locked>> | 84% | 40,335 psi | 63% | 2352 fps | 95.1% |
| Norma MRP | <<locked>> | 88% | 36,216 psi | 57% | 2359 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 35,766 psi | 56% | 2277 fps | 98.2% |
| Ramshot Big Game | <<locked>> | 80% | 47,935 psi | 75% | 2464 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 43,845 psi | 69% | 2477 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 80% | 34,708 psi | 54% | 2264 fps | 96.3% |
| Ramshot Magnum | <<locked>> | 96% | 38,914 psi | 61% | 2369 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,630 psi | 43% | 1434 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,861 psi | 72% | 2402 fps | 98.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 52,127 psi | 82% | 2559 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 42,235 psi | 66% | 2448 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,563 psi | 56% | 2297 fps | 98% |
| ReloadSwiss RS 70 | 77.8 gr | 80% | 34,766 psi | 54% | 2300 fps | 97.4% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 36,013 psi | 56% | 2375 fps | 95.3% |
| Rottweil R 902 | <<locked>> | 80% | 49,240 psi | 77% | 2411 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 42,757 psi | 67% | 2359 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 44,193 psi | 69% | 2392 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 88% | 38,435 psi | 60% | 2339 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 40,234 psi | 63% | 2297 fps | 96.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,088 psi | 61% | 2277 fps | 97.9% |
| Shooters World Match Rifle | <<locked>> | 80% | 52,953 psi | 83% | 2477 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 47,355 psi | 74% | 2402 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 37,318 psi | 58% | 2260 fps | 96.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,874 psi | 69% | 2408 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 53,664 psi | 84% | 2507 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 51,242 psi | 80% | 2477 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 52,417 psi | 82% | 2388 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,237 psi | 69% | 2277 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 38,334 psi | 60% | 2231 fps | 96.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 40,698 psi | 64% | 2385 fps | 95.7% |
| Somchem S335 | <<locked>> | 80% | 52,199 psi | 82% | 2388 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 53,519 psi | 84% | 2493 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 43,192 psi | 68% | 2359 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 48,254 psi | 76% | 2431 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 32,256 psi | 51% | 2241 fps | 99.7% |
| Somchem S385 | <<locked>> | 86% | 36,622 psi | 57% | 2277 fps | 95.3% |
| Vihtavuori N133 | <<locked>> | 80% | 52,953 psi | 83% | 2375 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 49,255 psi | 77% | 2375 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 49,530 psi | 78% | 2392 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 41,205 psi | 65% | 2297 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 37,188 psi | 58% | 2277 fps | 98.5% |
| Vihtavuori N165 | <<locked>> | 92% | 38,508 psi | 60% | 2303 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 47,892 psi | 75% | 2388 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,680 psi | 57% | 2277 fps | 98.2% |
| Vihtavuori N555 | <<locked>> | 80% | 28,123 psi | 44% | 2146 fps | 96.4% |
| Vihtavuori N560 | <<locked>> | 96% | 48,066 psi | 75% | 2562 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,448 psi | 57% | 2251 fps | 99.7% |
| Winchester 760 | <<locked>> | 80% | 37,971 psi | 60% | 2323 fps | 96.4% |
| Winchester StaBALL HD | <<locked>> | 82% | 24,250 psi | 38% | 2100 fps | 96% |
| Winchester StaBALL Match | <<locked>> | 80% | 51,256 psi | 80% | 2484 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 41,278 psi | 65% | 2359 fps | 95.6% |
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 109 powders for .375 Rem. Ultra Mag. loaded with the .375 | 300gr | Frontier PH PHL. Alliant Reloder-26 delivers the highest muzzle velocity at 2,720 fps; across all powders the maximum-charge window runs from 1,568 fps to 2,720 fps. Accurate 3100 gives the best case fill at 100 %, and 109 of the 109 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. The 300.0 gr projectile in 0.375" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate High Country, Accurate MAGPRO 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, Alliant Reloder-26, Alliant Reloder-16 rank at the top here: for .375 Rem. Ultra Mag. with the .375 | 300gr | Frontier PH PHL 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.