Load Specifications
Bullet:.375 | 270gr | Barnes X S
Bullet Manufacturer:Barnes
Bullet Weight:270 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 | 270gr | Barnes X S bullet and 99 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 2000-MR, ReloadSwiss RS 60 and Alliant Reloder-17.
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>> | 84% | 53,867 psi | 87% | 2428 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 55,622 psi | 90% | 2490 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 53,113 psi | 86% | 2457 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 53,592 psi | 86% | 2500 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 54,433 psi | 88% | 2467 fps | 96% |
| Accurate 4064 | <<locked>> | 92% | 55,869 psi | 90% | 2533 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 54,157 psi | 87% | 2585 fps | 99.2% |
| ADI AR 2206H | <<locked>> | 88% | 55,579 psi | 90% | 2549 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 94% | 56,144 psi | 90% | 2543 fps | 99.6% |
| ADI Benchmark 8208 | <<locked>> | 86% | 54,607 psi | 88% | 2507 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 55,027 psi | 89% | 2487 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 54,650 psi | 88% | 2648 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 56,144 psi | 90% | 2566 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 53,664 psi | 86% | 2543 fps | 99.5% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 52,025 psi | 84% | 2585 fps | 99.2% |
| Alliant Reloder-17 | <<locked>> | 96% | 53,084 psi | 86% | 2621 fps | 99.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 37,913 psi | 61% | 2359 fps | 97.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 41,756 psi | 67% | 2484 fps | 96.4% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 54,940 psi | 89% | 2559 fps | 99.3% |
| Bofors RP3 | <<locked>> | 92% | 53,708 psi | 87% | 2539 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 53,838 psi | 87% | 2500 fps | 96.2% |
| Hodgdon Benchmark | <<locked>> | 84% | 53,156 psi | 86% | 2448 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 53,896 psi | 87% | 2536 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 55,361 psi | 89% | 2618 fps | 99.7% |
| Hodgdon H322 | <<locked>> | 82% | 55,027 psi | 89% | 2500 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 56,130 psi | 90% | 2526 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 54,679 psi | 88% | 2546 fps | 98.9% |
| Hodgdon H414 | <<locked>> | 98% | 53,272 psi | 86% | 2579 fps | 96.9% |
| Hodgdon H4895 | <<locked>> | 88% | 56,159 psi | 90% | 2559 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 48,298 psi | 78% | 2477 fps | 99.5% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 54,853 psi | 88% | 2585 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 54,201 psi | 87% | 2605 fps | 96.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,520 psi | 57% | 1535 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 53,766 psi | 87% | 2513 fps | 99.9% |
| IMR 3031 | <<locked>> | 88% | 55,767 psi | 90% | 2546 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 55,941 psi | 90% | 2530 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 90% | 55,970 psi | 90% | 2507 fps | 97.1% |
| IMR 4198 | <<locked>> | 82% | 55,840 psi | 90% | 2425 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 53,243 psi | 86% | 2513 fps | 96.1% |
| IMR 4451 Enduron | <<locked>> | 96% | 55,347 psi | 89% | 2526 fps | 97% |
| IMR 4831ᴾ | <<locked>> | 100% | 51,256 psi | 83% | 2533 fps | 98.9% |
| IMR 4895 | <<locked>> | 90% | 54,940 psi | 89% | 2569 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 86% | 54,607 psi | 88% | 2507 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 55,434 psi | 89% | 2500 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 55,477 psi | 89% | 2533 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 55,201 psi | 89% | 2484 fps | 99.8% |
| Lovex S062 | <<locked>> | 92% | 55,956 psi | 90% | 2530 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 55,042 psi | 89% | 2526 fps | 98.2% |
| Lovex S070ᴾ | <<locked>> | 100% | 55,651 psi | 90% | 2552 fps | 97.4% |
| Norma 201 | <<locked>> | 88% | 54,955 psi | 89% | 2507 fps | 100% |
| Norma 202 | <<locked>> | 88% | 54,839 psi | 88% | 2507 fps | 100% |
| Norma 203B | <<locked>> | 92% | 56,159 psi | 90% | 2575 fps | 99.9% |
| Norma URPᴾ | <<locked>> | 100% | 52,910 psi | 85% | 2572 fps | 99% |
| Ramshot Big Game | <<locked>> | 92% | 56,115 psi | 90% | 2592 fps | 99.8% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 52,025 psi | 84% | 2566 fps | 97.5% |
| Ramshot TAC | <<locked>> | 86% | 54,853 psi | 88% | 2516 fps | 98.4% |
| Ramshot Wild Boar | <<locked>> | 86% | 54,302 psi | 87% | 2536 fps | 99.7% |
| Ramshot X-Terminator | <<locked>> | 84% | 55,564 psi | 90% | 2507 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,085 psi | 58% | 1575 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 54,143 psi | 87% | 2490 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 54,679 psi | 88% | 2523 fps | 97.6% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 53,330 psi | 86% | 2595 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 52,779 psi | 85% | 2625 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 53,301 psi | 86% | 2602 fps | 98.9% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 53,505 psi | 86% | 2621 fps | 98.6% |
| Rottweil R 901 | <<locked>> | 84% | 53,432 psi | 86% | 2457 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 55,347 psi | 89% | 2503 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 53,490 psi | 86% | 2530 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 96% | 53,838 psi | 87% | 2500 fps | 96.2% |
| Shooters World Long Rifle | <<locked>> | 98% | 55,042 psi | 89% | 2526 fps | 98.2% |
| Shooters World Match Rifle | <<locked>> | 88% | 55,477 psi | 89% | 2533 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 55,956 psi | 90% | 2530 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 55,651 psi | 90% | 2552 fps | 97.4% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 54,404 psi | 88% | 2575 fps | 99.8% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 53,592 psi | 86% | 2500 fps | 98.6% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 53,795 psi | 87% | 2523 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 56,072 psi | 90% | 2448 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 55,666 psi | 90% | 2444 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 55,332 psi | 89% | 2480 fps | 97% |
| Somchem S321 | <<locked>> | 84% | 55,970 psi | 90% | 2539 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 55,637 psi | 90% | 2451 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 52,707 psi | 85% | 2493 fps | 99.6% |
| Somchem S355 | <<locked>> | 94% | 53,751 psi | 87% | 2526 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 47,601 psi | 77% | 2533 fps | 100% |
| Vihtavuori N130 | <<locked>> | 84% | 55,927 psi | 90% | 2418 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 55,985 psi | 90% | 2434 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 54,404 psi | 88% | 2470 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 55,071 psi | 89% | 2484 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 55,027 psi | 89% | 2507 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 55,419 psi | 89% | 2566 fps | 99.2% |
| Vihtavuori N530 | <<locked>> | 86% | 55,129 psi | 89% | 2507 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 53,447 psi | 86% | 2484 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 54,766 psi | 88% | 2579 fps | 99% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 40,828 psi | 66% | 2428 fps | 97.6% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 56,115 psi | 90% | 2549 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 54,636 psi | 88% | 2549 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 53,272 psi | 86% | 2579 fps | 96.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,287 psi | 55% | 2349 fps | 97% |
| Winchester StaBALL Match | <<locked>> | 88% | 53,635 psi | 86% | 2530 fps | 99.9% |
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% | 47,834 psi | 77% | 2349 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 52,199 psi | 84% | 2448 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 41,611 psi | 67% | 2297 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 47,210 psi | 76% | 2415 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 51,097 psi | 82% | 2421 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 39,291 psi | 63% | 2290 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 36,883 psi | 59% | 2306 fps | 95.7% |
| ADI AR 2206H | <<locked>> | 80% | 43,801 psi | 71% | 2369 fps | 98.5% |
| ADI AR 2208 | <<locked>> | 80% | 37,449 psi | 60% | 2241 fps | 96.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 45,629 psi | 74% | 2375 fps | 99.5% |
| Alliant AR-Comp | <<locked>> | 80% | 45,658 psi | 74% | 2372 fps | 100% |
| Alliant Power Pro 2000-MR | 63.6 gr | 80% | 39,537 psi | 64% | 2385 fps | 96.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,101 psi | 60% | 2260 fps | 97.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 39,726 psi | 64% | 2316 fps | 97.2% |
| Alliant Reloder-16 | <<locked>> | 88% | 36,840 psi | 59% | 2306 fps | 95.5% |
| Alliant Reloder-17 | 62.6 gr | 80% | 32,184 psi | 52% | 2228 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 94% | 32,053 psi | 52% | 2224 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 98% | 39,102 psi | 63% | 2431 fps | 95.4% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 42,714 psi | 69% | 2369 fps | 97.4% |
| Bofors RP3 | <<locked>> | 80% | 37,072 psi | 60% | 2270 fps | 98.1% |
| Bofors RP7 | <<locked>> | 94% | 50,850 psi | 82% | 2457 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 47,398 psi | 76% | 2365 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 44,469 psi | 72% | 2398 fps | 99.7% |
| Hodgdon CFE223 | <<locked>> | 80% | 48,269 psi | 78% | 2513 fps | 98.9% |
| Hodgdon H322 | <<locked>> | 80% | 51,619 psi | 83% | 2457 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 52,692 psi | 85% | 2480 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 37,666 psi | 61% | 2267 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 94% | 47,007 psi | 76% | 2480 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 44,179 psi | 71% | 2379 fps | 99% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 32,111 psi | 52% | 2175 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 39,972 psi | 64% | 2356 fps | 98.7% |
| Hodgdon Superformance | <<locked>> | 96% | 50,531 psi | 81% | 2549 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,643 psi | 43% | 1375 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 42,177 psi | 68% | 2336 fps | 98.6% |
| IMR 3031 | <<locked>> | 80% | 43,526 psi | 70% | 2382 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,291 psi | 63% | 2267 fps | 97.2% |
| IMR 4166 Enduron | <<locked>> | 84% | 46,862 psi | 75% | 2369 fps | 95.2% |
| IMR 4198 | <<locked>> | 80% | 52,678 psi | 85% | 2385 fps | 100% |
| IMR 4350 | <<locked>> | 98% | 50,212 psi | 81% | 2470 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 90% | 46,572 psi | 75% | 2392 fps | 95% |
| IMR 4831 | <<locked>> | 88% | 35,578 psi | 57% | 2264 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 40,625 psi | 65% | 2343 fps | 98% |
| IMR 8208 XBR | <<locked>> | 80% | 45,629 psi | 74% | 2375 fps | 99.5% |
| Lovex D073.5 | <<locked>> | 80% | 52,040 psi | 84% | 2454 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 43,076 psi | 69% | 2359 fps | 99.9% |
| Lovex S060 | <<locked>> | 80% | 43,903 psi | 71% | 2313 fps | 98.6% |
| Lovex S062 | <<locked>> | 80% | 39,479 psi | 64% | 2277 fps | 98.8% |
| Lovex S065 | <<locked>> | 88% | 41,379 psi | 67% | 2310 fps | 95.3% |
| Lovex S070 | <<locked>> | 94% | 46,688 psi | 75% | 2421 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 43,424 psi | 70% | 2336 fps | 99.3% |
| Norma 202 | <<locked>> | 80% | 43,207 psi | 70% | 2339 fps | 100% |
| Norma 203B | <<locked>> | 80% | 39,160 psi | 63% | 2306 fps | 97.6% |
| Norma URP | <<locked>> | 88% | 36,898 psi | 59% | 2303 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 38,319 psi | 62% | 2310 fps | 97.2% |
| Ramshot Hunter | <<locked>> | 94% | 43,178 psi | 70% | 2421 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 45,556 psi | 73% | 2375 fps | 96.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 44,889 psi | 72% | 2398 fps | 98.7% |
| Ramshot X-Terminator | <<locked>> | 80% | 49,037 psi | 79% | 2415 fps | 99.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,050 psi | 44% | 1407 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 50,966 psi | 82% | 2448 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 45,687 psi | 74% | 2385 fps | 95.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 41,133 psi | 66% | 2402 fps | 97.6% |
| ReloadSwiss RS 60 | 62.6 gr | 80% | 34,069 psi | 55% | 2287 fps | 98.7% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 38,740 psi | 62% | 2362 fps | 95.8% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 41,394 psi | 67% | 2411 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 80% | 47,688 psi | 77% | 2375 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 41,539 psi | 67% | 2293 fps | 99% |
| Rottweil R 903 | <<locked>> | 80% | 35,099 psi | 57% | 2224 fps | 97.2% |
| Rottweil R 907 | <<locked>> | 94% | 50,850 psi | 82% | 2457 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 88% | 41,379 psi | 67% | 2310 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 43,076 psi | 69% | 2359 fps | 99.9% |
| Shooters World Precision | <<locked>> | 80% | 39,479 psi | 64% | 2277 fps | 98.8% |
| Shooters World SW4350 | <<locked>> | 94% | 46,688 psi | 75% | 2421 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,433 psi | 57% | 2257 fps | 96.4% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 44,135 psi | 71% | 2356 fps | 96.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 42,250 psi | 68% | 2343 fps | 98.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 44,498 psi | 72% | 2293 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,086 psi | 60% | 2178 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 45,890 psi | 74% | 2346 fps | 95% |
| Somchem S321 | <<locked>> | 80% | 49,342 psi | 79% | 2448 fps | 99.9% |
| Somchem S335 | <<locked>> | 80% | 44,179 psi | 71% | 2297 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 43,526 psi | 70% | 2356 fps | 98.4% |
| Somchem S355 | <<locked>> | 80% | 35,752 psi | 58% | 2224 fps | 97.2% |
| Somchem S365 | <<locked>> | 82% | 28,021 psi | 45% | 2123 fps | 95.4% |
| Vihtavuori N130 | <<locked>> | 80% | 49,951 psi | 80% | 2346 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 44,556 psi | 72% | 2287 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 40,567 psi | 65% | 2280 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 41,002 psi | 66% | 2283 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 33,968 psi | 55% | 2172 fps | 98% |
| Vihtavuori N160 | <<locked>> | 86% | 36,230 psi | 58% | 2254 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 45,832 psi | 74% | 2375 fps | 99.6% |
| Vihtavuori N540 | <<locked>> | 80% | 39,595 psi | 64% | 2277 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 88% | 37,913 psi | 61% | 2303 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 94% | 34,214 psi | 55% | 2293 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 32,198 psi | 52% | 2146 fps | 95.8% |
| Winchester 748 | <<locked>> | 80% | 45,063 psi | 73% | 2411 fps | 99.9% |
| Winchester 760 | <<locked>> | 94% | 47,210 psi | 76% | 2484 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 98% | 32,242 psi | 52% | 2290 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 41,655 psi | 67% | 2346 fps | 98.6% |
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 99 powders for .375 Ruger loaded with the .375 | 270gr | Barnes X S. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,648 fps; across all powders the maximum-charge window runs from 1,535 fps to 2,648 fps. Accurate 4350 gives the best case fill at 100 %, and 99 of the 99 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (428 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 270.0 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. Alliant Power Pro 2000-MR, ReloadSwiss RS 60, Alliant Reloder-17 rank at the top here: for .375 Ruger with the .375 | 270gr | 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.