Load Specifications
Bullet:.375 | 250gr | Barnes X S
Bullet Manufacturer:Barnes
Bullet Weight:250 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 | 250gr | Barnes X S bullet and 100 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Alliant Power Pro 2000-MR and ReloadSwiss RS 52.
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: 23"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 86% | 55,216 psi | 89% | 2549 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 53,722 psi | 87% | 2569 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 54,172 psi | 87% | 2572 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 55,056 psi | 89% | 2621 fps | 100% |
| Accurate 4064 | <<locked>> | 92% | 53,679 psi | 86% | 2608 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 51,822 psi | 83% | 2651 fps | 98.4% |
| ADI AR 2206H | <<locked>> | 88% | 53,838 psi | 87% | 2625 fps | 99.4% |
| ADI AR 2208 | <<locked>> | 94% | 54,215 psi | 87% | 2615 fps | 99.1% |
| ADI Benchmark 8208 | <<locked>> | 88% | 56,144 psi | 90% | 2628 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 52,939 psi | 85% | 2572 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 54,447 psi | 88% | 2680 fps | 99.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 56,173 psi | 90% | 2769 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 54,244 psi | 87% | 2641 fps | 99.8% |
| Alliant Reloder-10x | <<locked>> | 82% | 54,578 psi | 88% | 2552 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 54,868 psi | 88% | 2657 fps | 99.3% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 50,096 psi | 81% | 2648 fps | 98.4% |
| Alliant Reloder-17 | <<locked>> | 98% | 54,476 psi | 88% | 2743 fps | 99.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,579 psi | 59% | 2411 fps | 96.3% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 55,927 psi | 90% | 2523 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 53,142 psi | 86% | 2631 fps | 98.7% |
| Bofors RP3 | <<locked>> | 94% | 54,955 psi | 89% | 2657 fps | 99.9% |
| Bofors RP7 | <<locked>> | 98% | 55,216 psi | 89% | 2612 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 86% | 54,694 psi | 88% | 2569 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 55,492 psi | 89% | 2657 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 53,055 psi | 85% | 2687 fps | 99.1% |
| Hodgdon H322 | <<locked>> | 82% | 53,214 psi | 86% | 2582 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 54,375 psi | 88% | 2605 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 56,014 psi | 90% | 2661 fps | 98.5% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 54,418 psi | 88% | 2690 fps | 96.4% |
| Hodgdon H4895 | <<locked>> | 88% | 54,273 psi | 87% | 2635 fps | 99.7% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 46,441 psi | 75% | 2543 fps | 98.9% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 52,823 psi | 85% | 2661 fps | 99.8% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 55,869 psi | 90% | 2717 fps | 95.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,505 psi | 57% | 1608 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 55,259 psi | 89% | 2635 fps | 99.7% |
| IMR 3031 | <<locked>> | 88% | 53,679 psi | 86% | 2625 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 54,099 psi | 87% | 2605 fps | 99.2% |
| IMR 4166 Enduron | <<locked>> | 90% | 54,447 psi | 88% | 2579 fps | 96.1% |
| IMR 4198 | <<locked>> | 82% | 54,186 psi | 87% | 2510 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 96% | 53,606 psi | 86% | 2595 fps | 95.9% |
| IMR 4831ᴾ | <<locked>> | 100% | 49,008 psi | 79% | 2595 fps | 98% |
| IMR 4895 | <<locked>> | 90% | 52,997 psi | 85% | 2641 fps | 99.4% |
| IMR 8208 XBR | <<locked>> | 88% | 56,144 psi | 90% | 2628 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 53,388 psi | 86% | 2572 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 53,403 psi | 86% | 2608 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 53,476 psi | 86% | 2556 fps | 99.4% |
| Lovex S062 | <<locked>> | 92% | 54,041 psi | 87% | 2608 fps | 99.9% |
| Lovex S065 | <<locked>> | 98% | 53,156 psi | 86% | 2595 fps | 97.3% |
| Lovex S070ᴾ | <<locked>> | 100% | 53,679 psi | 86% | 2618 fps | 96.3% |
| Norma 201 | <<locked>> | 88% | 53,040 psi | 85% | 2582 fps | 99.9% |
| Norma 202 | <<locked>> | 88% | 53,113 psi | 86% | 2585 fps | 100% |
| Norma 203B | <<locked>> | 92% | 54,056 psi | 87% | 2648 fps | 99.5% |
| Norma URPᴾ | <<locked>> | 100% | 50,908 psi | 82% | 2641 fps | 98.2% |
| Ramshot Big Game | <<locked>> | 92% | 54,114 psi | 87% | 2664 fps | 99.4% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 49,995 psi | 81% | 2628 fps | 96.3% |
| Ramshot TAC | <<locked>> | 86% | 53,156 psi | 86% | 2589 fps | 97.5% |
| Ramshot Wild Boar | <<locked>> | 88% | 55,956 psi | 90% | 2657 fps | 99.6% |
| Ramshot X-Terminator | <<locked>> | 84% | 53,838 psi | 87% | 2579 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,969 psi | 58% | 1644 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 55,811 psi | 90% | 2615 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 52,895 psi | 85% | 2592 fps | 96.6% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 54,607 psi | 88% | 2717 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 54,317 psi | 88% | 2746 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 51,068 psi | 82% | 2667 fps | 98.1% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 51,561 psi | 83% | 2680 fps | 97.6% |
| Rottweil R 901 | <<locked>> | 86% | 54,607 psi | 88% | 2575 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 53,432 psi | 86% | 2579 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 96% | 54,810 psi | 88% | 2648 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 98% | 55,216 psi | 89% | 2612 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 98% | 53,156 psi | 86% | 2595 fps | 97.3% |
| Shooters World Match Rifle | <<locked>> | 88% | 53,403 psi | 86% | 2608 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 54,041 psi | 87% | 2608 fps | 99.9% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 53,679 psi | 86% | 2618 fps | 96.3% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 55,521 psi | 89% | 2585 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 55,883 psi | 90% | 2697 fps | 99.6% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 55,100 psi | 89% | 2566 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 55,216 psi | 89% | 2621 fps | 98.3% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 55,216 psi | 89% | 2641 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 54,404 psi | 88% | 2530 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 53,896 psi | 87% | 2523 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 53,403 psi | 86% | 2546 fps | 95.9% |
| Somchem S321 | <<locked>> | 84% | 54,085 psi | 87% | 2615 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 53,882 psi | 87% | 2530 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 54,302 psi | 87% | 2612 fps | 99.4% |
| Somchem S355 | <<locked>> | 96% | 55,172 psi | 89% | 2644 fps | 99.7% |
| Somchem S365ᴾ | <<locked>> | 100% | 45,745 psi | 74% | 2598 fps | 99.7% |
| Vihtavuori N130 | <<locked>> | 84% | 54,244 psi | 87% | 2500 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 54,273 psi | 87% | 2516 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 55,666 psi | 90% | 2592 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 53,214 psi | 86% | 2562 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 53,084 psi | 86% | 2582 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 53,301 psi | 86% | 2635 fps | 98.5% |
| Vihtavuori N530 | <<locked>> | 86% | 53,214 psi | 86% | 2582 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 92% | 55,042 psi | 89% | 2605 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 52,605 psi | 85% | 2644 fps | 98.2% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 38,972 psi | 63% | 2480 fps | 96.3% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 54,346 psi | 88% | 2621 fps | 99.8% |
| Winchester 748 | <<locked>> | 88% | 56,028 psi | 90% | 2671 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 54,737 psi | 88% | 2694 fps | 96.4% |
| Winchester StaBALL Match | <<locked>> | 90% | 54,998 psi | 89% | 2648 fps | 99.8% |
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% | 46,311 psi | 75% | 2428 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 50,401 psi | 81% | 2523 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 40,045 psi | 65% | 2369 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 45,513 psi | 73% | 2484 fps | 99.9% |
| Accurate 4064 | <<locked>> | 80% | 37,724 psi | 61% | 2356 fps | 99.7% |
| Accurate 4350 | <<locked>> | 90% | 37,478 psi | 60% | 2408 fps | 95% |
| ADI AR 2206H | <<locked>> | 80% | 42,279 psi | 68% | 2434 fps | 97.7% |
| ADI AR 2208 | <<locked>> | 80% | 36,216 psi | 58% | 2300 fps | 95.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,121 psi | 71% | 2444 fps | 99% |
| Alliant AR-Comp | <<locked>> | 80% | 43,874 psi | 71% | 2451 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 50,995 psi | 82% | 2628 fps | 99.5% |
| Alliant Power Pro 2000-MR | 65.1 gr | 80% | 38,174 psi | 61% | 2441 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,810 psi | 58% | 2326 fps | 96.9% |
| Alliant Reloder-10x | <<locked>> | 80% | 51,619 psi | 83% | 2510 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,232 psi | 62% | 2375 fps | 96% |
| Alliant Reloder-16 | <<locked>> | 92% | 39,856 psi | 64% | 2457 fps | 95.7% |
| Alliant Reloder-17 | <<locked>> | 84% | 35,056 psi | 56% | 2379 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 98% | 34,592 psi | 56% | 2365 fps | 95.4% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 52,721 psi | 85% | 2484 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 41,104 psi | 66% | 2431 fps | 96.2% |
| Bofors RP3 | <<locked>> | 80% | 35,549 psi | 57% | 2329 fps | 97% |
| Bofors RP7 | <<locked>> | 96% | 52,098 psi | 84% | 2566 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,050 psi | 74% | 2438 fps | 99.5% |
| Hodgdon BL-C2 | <<locked>> | 80% | 42,844 psi | 69% | 2464 fps | 99.2% |
| Hodgdon CFE223 | <<locked>> | 80% | 46,499 psi | 75% | 2582 fps | 98.1% |
| Hodgdon H322 | <<locked>> | 80% | 50,082 psi | 81% | 2539 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 50,865 psi | 82% | 2559 fps | 100% |
| Hodgdon H380 | <<locked>> | 84% | 41,089 psi | 66% | 2421 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 98% | 51,343 psi | 83% | 2641 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 42,641 psi | 69% | 2448 fps | 98.2% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 32,822 psi | 53% | 2274 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,493 psi | 62% | 2415 fps | 97.8% |
| Hodgdon Superformance | <<locked>> | 98% | 52,127 psi | 84% | 2661 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,513 psi | 43% | 1434 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,770 psi | 66% | 2402 fps | 97.8% |
| IMR 3031 | <<locked>> | 80% | 41,858 psi | 67% | 2454 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,000 psi | 61% | 2329 fps | 96% |
| IMR 4166 Enduron | <<locked>> | 88% | 51,184 psi | 82% | 2530 fps | 95.4% |
| IMR 4198 | <<locked>> | 80% | 51,184 psi | 82% | 2470 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 94% | 50,604 psi | 82% | 2549 fps | 95.2% |
| IMR 4831 | <<locked>> | 92% | 38,479 psi | 62% | 2411 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 39,117 psi | 63% | 2405 fps | 97% |
| IMR 8208 XBR | <<locked>> | 80% | 44,121 psi | 71% | 2444 fps | 99% |
| Lovex D073.5 | <<locked>> | 80% | 50,154 psi | 81% | 2526 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 41,452 psi | 67% | 2425 fps | 99.6% |
| Lovex S060 | <<locked>> | 80% | 42,612 psi | 69% | 2382 fps | 97.7% |
| Lovex S062 | <<locked>> | 80% | 38,116 psi | 61% | 2343 fps | 97.9% |
| Lovex S065 | <<locked>> | 92% | 44,701 psi | 72% | 2457 fps | 95.4% |
| Lovex S070 | <<locked>> | 98% | 50,647 psi | 82% | 2572 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 42,018 psi | 68% | 2405 fps | 98.7% |
| Norma 202 | <<locked>> | 80% | 41,872 psi | 67% | 2415 fps | 99.9% |
| Norma 203B | <<locked>> | 80% | 37,710 psi | 61% | 2365 fps | 96.5% |
| Norma URP | <<locked>> | 92% | 40,016 psi | 64% | 2451 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 36,927 psi | 59% | 2369 fps | 96% |
| Ramshot Hunter | <<locked>> | 98% | 47,195 psi | 76% | 2579 fps | 95.6% |
| Ramshot TAC | <<locked>> | 80% | 44,048 psi | 71% | 2441 fps | 95.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 43,265 psi | 70% | 2461 fps | 97.8% |
| Ramshot X-Terminator | <<locked>> | 80% | 47,703 psi | 77% | 2487 fps | 98.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,847 psi | 43% | 1470 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 49,182 psi | 79% | 2520 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 46,891 psi | 76% | 2497 fps | 95.2% |
| ReloadSwiss RS 52 | 63.1 gr | 80% | 39,334 psi | 63% | 2457 fps | 96.3% |
| ReloadSwiss RS 60 | 64.1 gr | 80% | 32,866 psi | 53% | 2339 fps | 97.6% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 39,552 psi | 64% | 2467 fps | 95.2% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 42,511 psi | 68% | 2520 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 46,253 psi | 75% | 2451 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 40,219 psi | 65% | 2362 fps | 98.3% |
| Rottweil R 903 | <<locked>> | 80% | 33,634 psi | 54% | 2280 fps | 95.9% |
| Rottweil R 907 | <<locked>> | 96% | 52,098 psi | 84% | 2566 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 92% | 44,701 psi | 72% | 2457 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 41,452 psi | 67% | 2425 fps | 99.6% |
| Shooters World Precision | <<locked>> | 80% | 38,116 psi | 61% | 2343 fps | 97.9% |
| Shooters World SW4350 | <<locked>> | 98% | 50,647 psi | 82% | 2572 fps | 95.7% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 51,924 psi | 84% | 2533 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,069 psi | 55% | 2310 fps | 95% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 51,779 psi | 83% | 2523 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 42,554 psi | 69% | 2418 fps | 95.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 40,683 psi | 66% | 2405 fps | 97.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,018 psi | 69% | 2362 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,781 psi | 58% | 2241 fps | 99.7% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 50,067 psi | 81% | 2500 fps | 95.2% |
| Somchem S321 | <<locked>> | 80% | 47,616 psi | 77% | 2520 fps | 99.6% |
| Somchem S335 | <<locked>> | 80% | 42,815 psi | 69% | 2365 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 41,916 psi | 68% | 2418 fps | 97.5% |
| Somchem S355 | <<locked>> | 80% | 34,432 psi | 55% | 2283 fps | 96% |
| Somchem S365 | <<locked>> | 86% | 30,269 psi | 49% | 2267 fps | 95.6% |
| Vihtavuori N130 | <<locked>> | 80% | 48,356 psi | 78% | 2421 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 42,989 psi | 69% | 2359 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 38,957 psi | 63% | 2352 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,581 psi | 64% | 2352 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 80% | 32,634 psi | 53% | 2228 fps | 96.9% |
| Vihtavuori N160 | <<locked>> | 90% | 39,291 psi | 63% | 2402 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 44,179 psi | 71% | 2441 fps | 99.1% |
| Vihtavuori N540 | <<locked>> | 80% | 38,247 psi | 62% | 2343 fps | 99.5% |
| Vihtavuori N550 | <<locked>> | 92% | 41,220 psi | 66% | 2454 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 98% | 36,767 psi | 59% | 2434 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 33,025 psi | 53% | 2241 fps | 95.2% |
| Winchester 748 | <<locked>> | 80% | 43,366 psi | 70% | 2480 fps | 99.5% |
| Winchester 760 | <<locked>> | 98% | 51,343 psi | 83% | 2641 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 40,089 psi | 65% | 2408 fps | 97.7% |
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 100 powders for .375 Ruger loaded with the .375 | 250gr | Barnes X S. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,769 fps; across all powders the maximum-charge window runs from 1,608 fps to 2,769 fps. Accurate 4350 gives the best case fill at 100 %, and 100 of the 100 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 250.0 gr projectile in 0.375" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Alliant Reloder-23 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, Alliant Power Pro 2000-MR, ReloadSwiss RS 52 rank at the top here: for .375 Ruger with the .375 | 250gr | Barnes X S 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.