Load Specifications
Bullet Manufacturer:Woodleigh
Bullet Weight:300 gr
Bullet Diameter:0.375"
Bullet Length:<<locked>>
Caliber:.375 Ruger load data
Case Length (l3):2.572"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:99 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:23"
Max. allowed Pressure:62,076 psi
Recommended Twist Rate:1:6.0
Load data in caliber .375 Ruger with .375 | 300gr | Woodleigh RN SN bullet and 102 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, ReloadSwiss RS 70 and Hodgdon Superformance.
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: 23"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 82% | 53,650 psi | 86% | 2336 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 56,115 psi | 90% | 2398 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 54,070 psi | 87% | 2415 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 54,781 psi | 88% | 2405 fps | 97.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 42,931 psi | 69% | 2326 fps | 97.3% |
| Accurate 4064 | <<locked>> | 90% | 55,970 psi | 90% | 2441 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 55,956 psi | 90% | 2523 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 86% | 56,159 psi | 90% | 2470 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 53,853 psi | 87% | 2428 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 50,763 psi | 82% | 2457 fps | 96.2% |
| ADI Benchmark 8208 | <<locked>> | 84% | 55,056 psi | 89% | 2425 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 56,144 psi | 90% | 2398 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 55,854 psi | 90% | 2579 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 50,386 psi | 81% | 2454 fps | 96.3% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 50,386 psi | 81% | 2454 fps | 96.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 53,896 psi | 87% | 2448 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 54,433 psi | 88% | 2467 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 98% | 53,476 psi | 86% | 2526 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 94% | 54,650 psi | 88% | 2556 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 49,632 psi | 80% | 2448 fps | 96.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 40,915 psi | 66% | 2352 fps | 99.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 45,730 psi | 74% | 2497 fps | 99.2% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 56,028 psi | 90% | 2487 fps | 100% |
| Bofors RP3 | <<locked>> | 90% | 54,389 psi | 88% | 2461 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 54,578 psi | 88% | 2441 fps | 98% |
| Hodgdon Benchmark | <<locked>> | 82% | 53,330 psi | 86% | 2365 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 54,433 psi | 88% | 2451 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 55,288 psi | 89% | 2474 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 96% | 54,955 psi | 89% | 2523 fps | 98.7% |
| Hodgdon H4350 | <<locked>> | 94% | 55,492 psi | 89% | 2487 fps | 97.6% |
| Hodgdon H4895 | <<locked>> | 84% | 53,287 psi | 86% | 2434 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 53,214 psi | 86% | 2461 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 52,649 psi | 85% | 2464 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 55,579 psi | 90% | 2556 fps | 98.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,665 psi | 57% | 1490 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 54,491 psi | 88% | 2438 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 53,461 psi | 86% | 2418 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 53,214 psi | 86% | 2411 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 53,185 psi | 86% | 2398 fps | 98.3% |
| IMR 4350 | <<locked>> | 98% | 54,766 psi | 88% | 2461 fps | 98.1% |
| IMR 4451 Enduron | <<locked>> | 92% | 53,040 psi | 85% | 2421 fps | 98.2% |
| IMR 4831 | <<locked>> | 98% | 52,823 psi | 85% | 2470 fps | 99.8% |
| IMR 4895 | <<locked>> | 88% | 55,825 psi | 90% | 2493 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 55,056 psi | 89% | 2425 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 56,173 psi | 90% | 2448 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 55,448 psi | 89% | 2405 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 53,258 psi | 86% | 2411 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 55,825 psi | 90% | 2461 fps | 99.4% |
| Lovex S070 | <<locked>> | 96% | 53,359 psi | 86% | 2448 fps | 98.5% |
| Norma 201 | <<locked>> | 86% | 54,897 psi | 88% | 2421 fps | 100% |
| Norma 202 | <<locked>> | 86% | 55,521 psi | 89% | 2421 fps | 100% |
| Norma 203B | <<locked>> | 88% | 53,635 psi | 86% | 2454 fps | 100% |
| Norma 204 | <<locked>> | 98% | 55,288 psi | 89% | 2507 fps | 97.1% |
| Norma MRPᴾ | <<locked>> | 100% | 45,614 psi | 73% | 2457 fps | 96.9% |
| Norma URP | <<locked>> | 98% | 54,897 psi | 88% | 2513 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 88% | 54,041 psi | 87% | 2477 fps | 100% |
| Ramshot Hunter | <<locked>> | 98% | 53,505 psi | 86% | 2510 fps | 99.1% |
| Ramshot TAC | <<locked>> | 84% | 55,201 psi | 89% | 2444 fps | 99.5% |
| Ramshot Wild Boar | <<locked>> | 84% | 55,071 psi | 89% | 2461 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 55,825 psi | 90% | 2428 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,158 psi | 58% | 1526 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 55,477 psi | 89% | 2457 fps | 99% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 54,839 psi | 88% | 2523 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 54,273 psi | 87% | 2552 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 55,492 psi | 89% | 2543 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 55,056 psi | 89% | 2569 fps | 99.8% |
| Rottweil R 901 | <<locked>> | 84% | 55,912 psi | 90% | 2402 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 55,463 psi | 89% | 2421 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 54,491 psi | 88% | 2454 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 48,312 psi | 78% | 2431 fps | 96.1% |
| Rottweil R 907 | <<locked>> | 94% | 54,578 psi | 88% | 2441 fps | 98% |
| Shooters World Long Rifle | <<locked>> | 96% | 55,825 psi | 90% | 2461 fps | 99.4% |
| Shooters World Match Rifle | <<locked>> | 86% | 56,173 psi | 90% | 2448 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 53,258 psi | 86% | 2411 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 53,359 psi | 86% | 2448 fps | 98.5% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 55,956 psi | 90% | 2507 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 53,896 psi | 87% | 2428 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 54,505 psi | 88% | 2444 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 52,997 psi | 85% | 2326 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 53,287 psi | 86% | 2326 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 56,072 psi | 90% | 2421 fps | 98.6% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 47,863 psi | 77% | 2425 fps | 96% |
| Somchem S335 | <<locked>> | 86% | 55,651 psi | 90% | 2362 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 53,447 psi | 86% | 2418 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 54,723 psi | 88% | 2451 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 52,939 psi | 85% | 2513 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 49,168 psi | 79% | 2415 fps | 97.1% |
| Vihtavuori N130 | <<locked>> | 82% | 56,014 psi | 90% | 2329 fps | 100% |
| Vihtavuori N133 | <<locked>> | 84% | 53,316 psi | 86% | 2313 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 55,332 psi | 89% | 2385 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 55,956 psi | 90% | 2402 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 55,970 psi | 90% | 2431 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 53,751 psi | 87% | 2464 fps | 99.8% |
| Vihtavuori N530 | <<locked>> | 84% | 55,492 psi | 89% | 2425 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 54,157 psi | 87% | 2402 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 52,852 psi | 85% | 2467 fps | 99.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 45,020 psi | 73% | 2415 fps | 99.5% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 53,824 psi | 87% | 2441 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 55,593 psi | 90% | 2467 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 55,245 psi | 89% | 2526 fps | 98.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 36,637 psi | 59% | 2369 fps | 99.8% |
| Winchester StaBALL Match | <<locked>> | 86% | 54,418 psi | 88% | 2454 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 23"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 50,502 psi | 81% | 2297 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 43,308 psi | 70% | 2241 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 50,444 psi | 81% | 2372 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 42,250 psi | 68% | 2218 fps | 95% |
| Accurate 3100 | <<locked>> | 96% | 37,405 psi | 60% | 2231 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 40,973 psi | 66% | 2241 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 30,052 psi | 48% | 2093 fps | 95% |
| ADI AR 2206H | <<locked>> | 80% | 46,456 psi | 75% | 2336 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 80% | 39,610 psi | 64% | 2211 fps | 98.5% |
| ADI AR 2209 | <<locked>> | 98% | 47,543 psi | 77% | 2408 fps | 95.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 48,530 psi | 78% | 2339 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 49,371 psi | 80% | 2320 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 42,511 psi | 68% | 2375 fps | 99.1% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 47,253 psi | 76% | 2408 fps | 95.5% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 47,253 psi | 76% | 2408 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 39,349 psi | 63% | 2231 fps | 99.5% |
| Alliant Reloder-15 | <<locked>> | 80% | 42,148 psi | 68% | 2287 fps | 99.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 30,632 psi | 49% | 2106 fps | 95.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 33,968 psi | 55% | 2211 fps | 98.3% |
| Alliant Reloder-19 | <<locked>> | 98% | 46,586 psi | 75% | 2398 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 88% | 28,282 psi | 46% | 2077 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 90% | 32,285 psi | 52% | 2221 fps | 95% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 45,876 psi | 74% | 2346 fps | 99.2% |
| Bofors RP3 | <<locked>> | 80% | 39,102 psi | 63% | 2238 fps | 99.5% |
| Bofors RP7 | <<locked>> | 86% | 42,438 psi | 68% | 2257 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 50,299 psi | 81% | 2326 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 47,718 psi | 77% | 2362 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 39,856 psi | 64% | 2241 fps | 97.6% |
| Hodgdon H414 | <<locked>> | 86% | 39,566 psi | 64% | 2280 fps | 95.4% |
| Hodgdon H4350 | <<locked>> | 88% | 45,905 psi | 74% | 2346 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 46,949 psi | 76% | 2346 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 28,094 psi | 45% | 2021 fps | 96% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 43,149 psi | 70% | 2326 fps | 99.9% |
| Hodgdon Superformance | 77.4 gr | 88% | 41,858 psi | 67% | 2343 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,658 psi | 43% | 1332 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 44,991 psi | 72% | 2303 fps | 99.8% |
| IMR 3031 | <<locked>> | 80% | 46,891 psi | 76% | 2336 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 41,611 psi | 67% | 2241 fps | 99% |
| IMR 4166 Enduron | <<locked>> | 80% | 44,048 psi | 71% | 2257 fps | 96.4% |
| IMR 4350 | <<locked>> | 90% | 42,743 psi | 69% | 2283 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 84% | 41,481 psi | 67% | 2241 fps | 95.7% |
| IMR 4831 | <<locked>> | 82% | 31,343 psi | 50% | 2106 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 43,207 psi | 70% | 2313 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 80% | 48,530 psi | 78% | 2339 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 46,006 psi | 74% | 2320 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 46,340 psi | 75% | 2280 fps | 99.8% |
| Lovex S062 | <<locked>> | 80% | 41,568 psi | 67% | 2241 fps | 99.8% |
| Lovex S065 | <<locked>> | 82% | 36,376 psi | 59% | 2152 fps | 95.7% |
| Lovex S070 | <<locked>> | 86% | 39,001 psi | 63% | 2221 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 45,687 psi | 74% | 2297 fps | 100% |
| Norma 202 | <<locked>> | 80% | 45,977 psi | 74% | 2300 fps | 100% |
| Norma 203B | <<locked>> | 80% | 41,539 psi | 67% | 2277 fps | 99.3% |
| Norma 204 | <<locked>> | 94% | 48,501 psi | 78% | 2408 fps | 95.6% |
| Norma MRP | <<locked>> | 96% | 39,885 psi | 64% | 2352 fps | 95.1% |
| Norma URP | <<locked>> | 82% | 32,605 psi | 53% | 2142 fps | 95.9% |
| Ramshot Big Game | <<locked>> | 80% | 41,278 psi | 66% | 2290 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 86% | 36,216 psi | 58% | 2221 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 48,515 psi | 78% | 2352 fps | 98.7% |
| Ramshot Wild Boar | <<locked>> | 80% | 48,196 psi | 78% | 2369 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 80% | 52,315 psi | 84% | 2382 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,006 psi | 44% | 1365 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 40,248 psi | 65% | 2224 fps | 96.1% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 44,686 psi | 72% | 2379 fps | 99.4% |
| ReloadSwiss RS 60 | 66.5 gr | 80% | 36,143 psi | 58% | 2267 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 31,981 psi | 52% | 2156 fps | 95.4% |
| ReloadSwiss RS 70 | 70.9 gr | 84% | 34,200 psi | 55% | 2205 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 49,705 psi | 80% | 2323 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 43,482 psi | 70% | 2254 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 36,767 psi | 59% | 2188 fps | 99% |
| Rottweil R 905 | <<locked>> | 98% | 45,194 psi | 73% | 2382 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 86% | 42,438 psi | 68% | 2257 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 82% | 36,376 psi | 59% | 2152 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 46,006 psi | 74% | 2320 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 41,568 psi | 67% | 2241 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 39,001 psi | 63% | 2221 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 37,739 psi | 61% | 2231 fps | 98.6% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 47,050 psi | 76% | 2333 fps | 98.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 45,020 psi | 73% | 2313 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 46,876 psi | 76% | 2247 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,131 psi | 63% | 2136 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 40,480 psi | 65% | 2192 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 44,773 psi | 72% | 2375 fps | 95.1% |
| Somchem S335 | <<locked>> | 80% | 46,557 psi | 75% | 2247 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 46,746 psi | 75% | 2326 fps | 99.8% |
| Somchem S355 | <<locked>> | 80% | 37,666 psi | 61% | 2195 fps | 99% |
| Somchem S365 | <<locked>> | 80% | 27,412 psi | 44% | 2057 fps | 97.3% |
| Somchem S385 | <<locked>> | 96% | 42,931 psi | 69% | 2320 fps | 95.6% |
| Vihtavuori N130 | <<locked>> | 80% | 52,750 psi | 85% | 2290 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 47,239 psi | 76% | 2238 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 43,076 psi | 69% | 2234 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 43,468 psi | 70% | 2241 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 35,679 psi | 57% | 2136 fps | 99.4% |
| Vihtavuori N160 | <<locked>> | 80% | 31,807 psi | 51% | 2096 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 48,718 psi | 78% | 2336 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 41,930 psi | 68% | 2234 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 31,328 psi | 50% | 2100 fps | 95% |
| Vihtavuori N555 | <<locked>> | 86% | 28,543 psi | 46% | 2096 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,662 psi | 51% | 2080 fps | 97.6% |
| Winchester 748 | <<locked>> | 80% | 48,660 psi | 78% | 2379 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 39,566 psi | 64% | 2280 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 90% | 26,585 psi | 43% | 2090 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 44,614 psi | 72% | 2316 fps | 99.8% |
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 102 powders for .375 Ruger loaded with the .375 | 300gr | Woodleigh RN SN. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,579 fps; across all powders the maximum-charge window runs from 1,490 fps to 2,579 fps. Accurate 3100 gives the best case fill at 100 %, and 102 of the 102 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (428 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, 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 60, ReloadSwiss RS 70, Hodgdon Superformance rank at the top here: for .375 Ruger with the .375 | 300gr | 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.