Load Specifications
Load data in caliber .375 Rem. Ultra Mag. with .375 | 350gr | Woodleigh FMJ bullet and 93 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Norma MRP and Vihtavuori N560.
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.
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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 2700 | <<locked>> | 82% | 55,506 psi | 87% | 2323 fps | 99.8% |
| Accurate 3100 | <<locked>> | 98% | 54,041 psi | 85% | 2372 fps | 100% |
| Accurate 4064 | <<locked>> | 82% | 55,158 psi | 86% | 2300 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 56,115 psi | 88% | 2405 fps | 100% |
| Accurate MAGPRO | <<locked>> | 98% | 56,173 psi | 88% | 2503 fps | 98.3% |
| ADI AR 2208 | <<locked>> | 84% | 54,926 psi | 86% | 2329 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 56,942 psi | 89% | 2454 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 98% | 54,331 psi | 85% | 2454 fps | 98.8% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 42,453 psi | 67% | 2264 fps | 96.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 37,434 psi | 59% | 2234 fps | 98.2% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 56,927 psi | 89% | 2448 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 55,985 psi | 88% | 2349 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 56,014 psi | 88% | 2369 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 56,913 psi | 89% | 2451 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 54,418 psi | 85% | 2425 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 56,188 psi | 88% | 2441 fps | 99.6% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 57,319 psi | 90% | 2497 fps | 99.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 54,317 psi | 85% | 2421 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 47,166 psi | 74% | 2385 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 96% | 54,549 psi | 85% | 2507 fps | 100% |
| Baschieri & Pellagri 109ᴾ | <<locked>> | 100% | 57,014 psi | 89% | 2421 fps | 96.5% |
| Bofors RP15ᴾ | <<locked>> | 100% | 52,649 psi | 83% | 2434 fps | 99.4% |
| Bofors RP3 | <<locked>> | 84% | 56,869 psi | 89% | 2362 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 43,105 psi | 68% | 2326 fps | 97.4% |
| Bofors RP5ᴾ | <<locked>> | 100% | 57,319 psi | 90% | 2497 fps | 99.8% |
| Bofors RP7 | <<locked>> | 88% | 55,970 psi | 88% | 2362 fps | 99.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 46,630 psi | 73% | 2336 fps | 98.2% |
| Hodgdon H380 | <<locked>> | 84% | 57,043 psi | 89% | 2382 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 54,520 psi | 85% | 2408 fps | 100% |
| Hodgdon H4350 | <<locked>> | 88% | 57,667 psi | 90% | 2415 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 96% | 54,578 psi | 86% | 2405 fps | 98.2% |
| Hodgdon H4831 SC | <<locked>> | 98% | 57,116 psi | 90% | 2434 fps | 98.6% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 57,087 psi | 89% | 2379 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 46,093 psi | 72% | 2428 fps | 99.3% |
| Hodgdon Superformance | <<locked>> | 88% | 54,476 psi | 85% | 2441 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,637 psi | 57% | 1447 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 54,418 psi | 85% | 2313 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 56,681 psi | 89% | 2349 fps | 100% |
| IMR 4350 | <<locked>> | 92% | 56,985 psi | 89% | 2392 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 88% | 57,537 psi | 90% | 2382 fps | 100% |
| IMR 4831 | <<locked>> | 92% | 56,347 psi | 88% | 2395 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 57,450 psi | 90% | 2388 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 56,173 psi | 88% | 2392 fps | 98.6% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 55,492 psi | 87% | 2477 fps | 99% |
| Lovex S062 | <<locked>> | 82% | 54,650 psi | 86% | 2306 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 54,302 psi | 85% | 2336 fps | 100% |
| Lovex S070 | <<locked>> | 90% | 55,651 psi | 87% | 2375 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 48,037 psi | 75% | 2297 fps | 99.9% |
| Norma 203B | <<locked>> | 82% | 55,332 psi | 87% | 2356 fps | 100% |
| Norma 204 | <<locked>> | 90% | 54,259 psi | 85% | 2395 fps | 99.3% |
| Norma 217ᴾ | <<locked>> | 100% | 32,996 psi | 52% | 2169 fps | 96.1% |
| Norma MRP | <<locked>> | 98% | 57,246 psi | 90% | 2520 fps | 100% |
| Norma URP | <<locked>> | 90% | 54,636 psi | 86% | 2392 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 56,246 psi | 88% | 2382 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 56,101 psi | 88% | 2493 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 92% | 56,985 psi | 89% | 2441 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 50,270 psi | 79% | 2392 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,420 psi | 59% | 1483 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 56,884 psi | 89% | 2372 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 53,751 psi | 84% | 2411 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 55,912 psi | 88% | 2425 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 54,186 psi | 85% | 2451 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 46,122 psi | 72% | 2425 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 82% | 56,579 psi | 89% | 2313 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 56,913 psi | 89% | 2359 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 54,926 psi | 86% | 2382 fps | 98.8% |
| Rottweil R 905 | <<locked>> | 96% | 55,637 psi | 87% | 2431 fps | 99.6% |
| Rottweil R 907 | <<locked>> | 88% | 55,970 psi | 88% | 2362 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 88% | 54,302 psi | 85% | 2336 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 54,650 psi | 86% | 2306 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 55,651 psi | 87% | 2375 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 54,810 psi | 86% | 2372 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 57,493 psi | 90% | 2251 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 57,493 psi | 90% | 2343 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 55,172 psi | 86% | 2428 fps | 99.6% |
| Somchem S355 | <<locked>> | 86% | 56,768 psi | 89% | 2356 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 56,521 psi | 89% | 2375 fps | 98.4% |
| Somchem S365 | <<locked>> | 92% | 54,230 psi | 85% | 2392 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 56,057 psi | 88% | 2408 fps | 99.9% |
| Vihtavuori N135 | <<locked>> | 82% | 57,217 psi | 90% | 2274 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 57,130 psi | 90% | 2287 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 54,476 psi | 85% | 2293 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 56,724 psi | 89% | 2382 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 55,506 psi | 87% | 2388 fps | 99.7% |
| Vihtavuori N540 | <<locked>> | 82% | 55,288 psi | 87% | 2290 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 55,695 psi | 87% | 2388 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 57,043 psi | 89% | 2444 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 57,363 psi | 90% | 2516 fps | 98.9% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 49,124 psi | 77% | 2395 fps | 97.9% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 56,217 psi | 88% | 2352 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 54,708 psi | 86% | 2411 fps | 100% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 50,038 psi | 78% | 2490 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 56,289 psi | 88% | 2405 fps | 99.6% |
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 2700 | <<locked>> | 80% | 51,938 psi | 81% | 2277 fps | 99.5% |
| Accurate 3100 | <<locked>> | 80% | 29,486 psi | 46% | 1975 fps | 96.3% |
| Accurate 4064 | <<locked>> | 80% | 51,924 psi | 81% | 2260 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,972 psi | 63% | 2185 fps | 99.8% |
| Accurate MAGPRO | <<locked>> | 90% | 42,337 psi | 66% | 2300 fps | 95.3% |
| ADI AR 2208 | <<locked>> | 80% | 48,660 psi | 76% | 2251 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 36,056 psi | 56% | 2126 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 88% | 39,175 psi | 61% | 2208 fps | 95.2% |
| ADI AR 2217 | <<locked>> | 98% | 39,726 psi | 62% | 2215 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 94% | 31,125 psi | 49% | 2090 fps | 95.5% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 36,260 psi | 57% | 2129 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 49,385 psi | 77% | 2270 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 52,533 psi | 82% | 2326 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,711 psi | 61% | 2192 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 44,034 psi | 69% | 2290 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 35,911 psi | 56% | 2123 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 84% | 33,837 psi | 53% | 2119 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,529 psi | 45% | 2005 fps | 99.1% |
| Alliant Reloder-25 | <<locked>> | 82% | 26,716 psi | 42% | 1969 fps | 95.2% |
| Alliant Reloder-26 | 76.2 gr | 80% | 30,560 psi | 48% | 2106 fps | 98.1% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 50,372 psi | 79% | 2329 fps | 95% |
| Bofors RP15 | <<locked>> | 88% | 35,810 psi | 56% | 2162 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 49,879 psi | 78% | 2280 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 37,681 psi | 59% | 2231 fps | 95.8% |
| Bofors RP5 | <<locked>> | 84% | 33,837 psi | 53% | 2119 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 43,627 psi | 68% | 2188 fps | 98.6% |
| Hodgdon H1000 | <<locked>> | 94% | 38,290 psi | 60% | 2192 fps | 95.8% |
| Hodgdon H380 | <<locked>> | 80% | 50,111 psi | 79% | 2297 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 41,843 psi | 66% | 2224 fps | 98.8% |
| Hodgdon H4350 | <<locked>> | 80% | 44,657 psi | 70% | 2234 fps | 98.3% |
| Hodgdon H4831 | <<locked>> | 88% | 41,800 psi | 66% | 2215 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 88% | 41,060 psi | 64% | 2201 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,274 psi | 57% | 2096 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 33,489 psi | 52% | 2172 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 40,770 psi | 64% | 2241 fps | 98.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,514 psi | 43% | 1293 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,213 psi | 80% | 2274 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 53,229 psi | 83% | 2303 fps | 99.9% |
| IMR 4350 | <<locked>> | 80% | 39,334 psi | 62% | 2136 fps | 97.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,049 psi | 71% | 2211 fps | 99.1% |
| IMR 4831 | <<locked>> | 80% | 38,377 psi | 60% | 2142 fps | 99.7% |
| IMR 4895 | <<locked>> | 80% | 53,911 psi | 84% | 2346 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 41,046 psi | 64% | 2169 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 90% | 40,030 psi | 63% | 2238 fps | 95.7% |
| Lovex S062 | <<locked>> | 80% | 51,445 psi | 81% | 2267 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,627 psi | 67% | 2172 fps | 99.5% |
| Lovex S070 | <<locked>> | 80% | 40,915 psi | 64% | 2162 fps | 98.7% |
| Lovex S071 | <<locked>> | 82% | 27,224 psi | 43% | 1923 fps | 95.2% |
| Norma 203B | <<locked>> | 80% | 51,895 psi | 81% | 2313 fps | 100% |
| Norma 204 | <<locked>> | 80% | 38,841 psi | 61% | 2162 fps | 96.5% |
| Norma 217 | <<locked>> | 98% | 31,053 psi | 49% | 2123 fps | 95.1% |
| Norma MRP | 73.9 gr | 80% | 30,763 psi | 48% | 2077 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 39,639 psi | 62% | 2178 fps | 99.8% |
| Ramshot Big Game | <<locked>> | 80% | 52,576 psi | 82% | 2336 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 39,566 psi | 62% | 2241 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 38,493 psi | 60% | 2175 fps | 98.8% |
| Ramshot Magnum | <<locked>> | 88% | 32,793 psi | 51% | 2093 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,978 psi | 44% | 1322 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,980 psi | 78% | 2283 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 46,731 psi | 73% | 2323 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,711 psi | 62% | 2201 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 38,377 psi | 60% | 2215 fps | 99.5% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 30,560 psi | 48% | 2100 fps | 95% |
| Rottweil R 902 | <<locked>> | 80% | 53,258 psi | 83% | 2274 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 47,065 psi | 74% | 2241 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 39,943 psi | 63% | 2156 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 82% | 35,085 psi | 55% | 2110 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 43,627 psi | 68% | 2188 fps | 98.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,627 psi | 67% | 2172 fps | 99.5% |
| Shooters World Precision | <<locked>> | 80% | 51,445 psi | 81% | 2267 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,915 psi | 64% | 2162 fps | 98.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 48,225 psi | 76% | 2287 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,921 psi | 75% | 2146 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,684 psi | 65% | 2126 fps | 98.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 34,751 psi | 54% | 2106 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 47,137 psi | 74% | 2234 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 40,611 psi | 64% | 2146 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 36,230 psi | 57% | 2142 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 33,417 psi | 52% | 2054 fps | 96% |
| Vihtavuori N135 | <<locked>> | 80% | 53,780 psi | 84% | 2238 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 53,809 psi | 84% | 2251 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 45,092 psi | 71% | 2175 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,973 psi | 64% | 2172 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 84% | 32,895 psi | 52% | 2037 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 51,982 psi | 81% | 2251 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 40,466 psi | 63% | 2178 fps | 99.7% |
| Vihtavuori N555 | <<locked>> | 80% | 31,807 psi | 50% | 2067 fps | 99.1% |
| Vihtavuori N560 | 81.3 gr | 88% | 40,799 psi | 64% | 2267 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 94% | 40,074 psi | 63% | 2251 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,914 psi | 63% | 2146 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 42,003 psi | 66% | 2228 fps | 98.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,251 psi | 40% | 2005 fps | 99% |
| Winchester Supreme 780 | <<locked>> | 84% | 34,809 psi | 55% | 2080 fps | 95.3% |
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 93 powders for .375 Rem. Ultra Mag. loaded with the .375 | 350gr | Woodleigh FMJ. Norma MRP delivers the highest muzzle velocity at 2,520 fps; across all powders the maximum-charge window runs from 1,447 fps to 2,520 fps. ADI AR 2217 gives the best case fill at 100 %, and 93 of the 93 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 52–90 %, leaving at least 10 % headroom. The 350.0 gr projectile in 0.375" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-22 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-26, Norma MRP, Vihtavuori N560 rank at the top here: for .375 Rem. Ultra Mag. with the .375 | 350gr | Woodleigh FMJ 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.