Load Specifications
Load data in caliber .375 Ruger with .375 | 250gr | CutEdge Maximus bullet and 95 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 52 and Hodgdon LEVERevolution.
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>> | 90% | 55,666 psi | 90% | 2572 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 55,883 psi | 90% | 2661 fps | 99.1% |
| Accurate 2460 | <<locked>> | 86% | 54,027 psi | 87% | 2592 fps | 100% |
| Accurate 2495 | <<locked>> | 96% | 56,043 psi | 90% | 2621 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 55,927 psi | 90% | 2648 fps | 100% |
| Accurate 4064 | <<locked>> | 98% | 55,782 psi | 90% | 2657 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 44,730 psi | 72% | 2562 fps | 97% |
| Accurate LT-30 | <<locked>> | 84% | 55,796 psi | 90% | 2526 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 52,721 psi | 85% | 2503 fps | 100% |
| ADI AR 2206H | <<locked>> | 92% | 54,781 psi | 88% | 2654 fps | 99.5% |
| ADI AR 2208 | <<locked>> | 98% | 55,753 psi | 90% | 2644 fps | 99.2% |
| ADI AR 2219 | <<locked>> | 82% | 52,663 psi | 85% | 2589 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 90% | 54,186 psi | 87% | 2615 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 90% | 53,737 psi | 87% | 2598 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 86% | 55,608 psi | 90% | 2713 fps | 99.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 94% | 54,433 psi | 88% | 2753 fps | 99.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 54,969 psi | 89% | 2664 fps | 99.8% |
| Alliant Reloder-10x | <<locked>> | 86% | 55,608 psi | 90% | 2582 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 96% | 55,869 psi | 90% | 2684 fps | 99.3% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 44,933 psi | 72% | 2572 fps | 97.1% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 52,257 psi | 84% | 2720 fps | 99.6% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 54,940 psi | 89% | 2520 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 92% | 54,607 psi | 88% | 2664 fps | 98.8% |
| Bofors RP3 | <<locked>> | 98% | 55,317 psi | 89% | 2677 fps | 99.9% |
| Hodgdon Benchmark | <<locked>> | 88% | 53,084 psi | 86% | 2559 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 90% | 52,852 psi | 85% | 2638 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 88% | 54,926 psi | 88% | 2726 fps | 99.3% |
| Hodgdon H322 | <<locked>> | 86% | 54,839 psi | 88% | 2618 fps | 100% |
| Hodgdon H335 | <<locked>> | 86% | 56,086 psi | 90% | 2641 fps | 100% |
| Hodgdon H380 | <<locked>> | 96% | 53,447 psi | 86% | 2638 fps | 98.1% |
| Hodgdon H4895 | <<locked>> | 92% | 55,274 psi | 89% | 2664 fps | 99.7% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 41,147 psi | 66% | 2467 fps | 97.8% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 53,925 psi | 87% | 2687 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,287 psi | 55% | 1591 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 53,461 psi | 86% | 2621 fps | 99.6% |
| IMR 3031 | <<locked>> | 92% | 54,476 psi | 88% | 2654 fps | 100% |
| IMR 4064 | <<locked>> | 96% | 55,303 psi | 89% | 2631 fps | 99.2% |
| IMR 4198 | <<locked>> | 84% | 52,852 psi | 85% | 2507 fps | 100% |
| IMR 4451 Enduronᴾ | <<locked>> | 100% | 55,158 psi | 89% | 2625 fps | 96.1% |
| IMR 4831ᴾ | <<locked>> | 100% | 42,917 psi | 69% | 2513 fps | 96.7% |
| IMR 4895 | <<locked>> | 94% | 53,693 psi | 86% | 2667 fps | 99.4% |
| IMR 8208 XBR | <<locked>> | 90% | 54,186 psi | 87% | 2615 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 86% | 54,099 psi | 87% | 2602 fps | 100% |
| Lovex D073.6 | <<locked>> | 92% | 53,708 psi | 87% | 2631 fps | 100% |
| Lovex S060 | <<locked>> | 92% | 55,071 psi | 89% | 2589 fps | 99.5% |
| Lovex S062 | <<locked>> | 96% | 54,389 psi | 88% | 2628 fps | 99.9% |
| Lovex S065ᴾ | <<locked>> | 100% | 50,372 psi | 81% | 2566 fps | 96.7% |
| Norma 200 | <<locked>> | 82% | 55,259 psi | 89% | 2552 fps | 100% |
| Norma 201 | <<locked>> | 92% | 53,301 psi | 86% | 2602 fps | 99.8% |
| Norma 202 | <<locked>> | 92% | 53,853 psi | 87% | 2612 fps | 100% |
| Norma 203B | <<locked>> | 96% | 54,969 psi | 89% | 2674 fps | 99.5% |
| Norma URPᴾ | <<locked>> | 100% | 45,092 psi | 73% | 2562 fps | 97% |
| Ramshot Big Game | <<locked>> | 96% | 55,709 psi | 90% | 2697 fps | 99.5% |
| Ramshot TAC | <<locked>> | 90% | 54,897 psi | 88% | 2625 fps | 97.7% |
| Ramshot Wild Boar | <<locked>> | 90% | 53,838 psi | 87% | 2641 fps | 99.4% |
| Ramshot X-Terminator | <<locked>> | 88% | 55,535 psi | 89% | 2615 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,534 psi | 56% | 1627 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 53,969 psi | 87% | 2605 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 96% | 54,259 psi | 87% | 2621 fps | 96.7% |
| ReloadSwiss RS 52 | <<locked>> | 94% | 55,956 psi | 90% | 2746 fps | 99.3% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 55,898 psi | 90% | 2779 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 44,802 psi | 72% | 2579 fps | 96.7% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 46,195 psi | 74% | 2598 fps | 96% |
| Rottweil R 901 | <<locked>> | 90% | 54,085 psi | 87% | 2592 fps | 100% |
| Rottweil R 902 | <<locked>> | 94% | 53,737 psi | 87% | 2598 fps | 99.9% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 54,940 psi | 89% | 2664 fps | 99.8% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 50,372 psi | 81% | 2566 fps | 96.7% |
| Shooters World Match Rifle | <<locked>> | 92% | 53,708 psi | 87% | 2631 fps | 100% |
| Shooters World Precision | <<locked>> | 96% | 54,389 psi | 88% | 2628 fps | 99.9% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 53,795 psi | 87% | 2572 fps | 99.7% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 55,956 psi | 90% | 2300 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 52,997 psi | 85% | 2598 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 53,577 psi | 86% | 2677 fps | 99.4% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 53,287 psi | 86% | 2559 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 52,605 psi | 85% | 2598 fps | 97.8% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 53,171 psi | 86% | 2625 fps | 99.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 55,869 psi | 90% | 2559 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 55,361 psi | 89% | 2552 fps | 100% |
| Somchem S321 | <<locked>> | 88% | 55,419 psi | 89% | 2648 fps | 100% |
| Somchem S335 | <<locked>> | 92% | 54,607 psi | 88% | 2556 fps | 100% |
| Somchem S341 | <<locked>> | 92% | 55,883 psi | 90% | 2644 fps | 99.5% |
| Somchem S355ᴾ | <<locked>> | 100% | 55,651 psi | 90% | 2667 fps | 99.7% |
| Somchem S365ᴾ | <<locked>> | 100% | 39,987 psi | 64% | 2510 fps | 98.8% |
| Vihtavuori N130 | <<locked>> | 88% | 55,477 psi | 89% | 2533 fps | 100% |
| Vihtavuori N133 | <<locked>> | 92% | 55,767 psi | 90% | 2549 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 52,823 psi | 85% | 2575 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 54,317 psi | 88% | 2589 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 53,867 psi | 87% | 2605 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 47,587 psi | 77% | 2562 fps | 97.4% |
| Vihtavuori N530 | <<locked>> | 90% | 54,679 psi | 88% | 2615 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 94% | 52,518 psi | 85% | 2585 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 46,528 psi | 75% | 2566 fps | 97% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 48,979 psi | 79% | 2552 fps | 99.2% |
| Winchester 748 | <<locked>> | 90% | 54,027 psi | 87% | 2657 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 92% | 52,750 psi | 85% | 2631 fps | 99.6% |
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% | 40,466 psi | 65% | 2359 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 52,272 psi | 84% | 2608 fps | 98.6% |
| Accurate 2460 | <<locked>> | 80% | 43,976 psi | 71% | 2451 fps | 99.9% |
| Accurate 2495 | <<locked>> | 80% | 32,518 psi | 52% | 2264 fps | 99.9% |
| Accurate 2520 | <<locked>> | 80% | 39,320 psi | 63% | 2402 fps | 99.3% |
| Accurate 4064 | <<locked>> | 80% | 30,763 psi | 50% | 2244 fps | 98.4% |
| Accurate 4350 | <<locked>> | 96% | 38,682 psi | 62% | 2454 fps | 95.3% |
| Accurate LT-30 | <<locked>> | 80% | 49,255 psi | 79% | 2441 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 49,661 psi | 80% | 2461 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 37,202 psi | 60% | 2359 fps | 96.2% |
| ADI AR 2208 | <<locked>> | 84% | 36,114 psi | 58% | 2316 fps | 95% |
| ADI AR 2219 | <<locked>> | 80% | 49,255 psi | 79% | 2543 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 39,276 psi | 63% | 2375 fps | 98% |
| Alliant AR-Comp | <<locked>> | 80% | 38,218 psi | 62% | 2382 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 45,426 psi | 73% | 2556 fps | 98.7% |
| Alliant Power Pro 2000-MR | 67 gr | 84% | 38,508 psi | 62% | 2467 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 32,663 psi | 53% | 2280 fps | 95.7% |
| Alliant Reloder-10x | <<locked>> | 80% | 45,977 psi | 74% | 2454 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 35,404 psi | 57% | 2339 fps | 95% |
| Alliant Reloder-16 | <<locked>> | 96% | 39,711 psi | 64% | 2470 fps | 95.5% |
| Alliant Reloder-17 | <<locked>> | 88% | 34,664 psi | 56% | 2388 fps | 95.6% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 48,269 psi | 78% | 2434 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 38,812 psi | 63% | 2405 fps | 95.4% |
| Bofors RP3 | <<locked>> | 82% | 31,850 psi | 51% | 2277 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 41,423 psi | 67% | 2379 fps | 98.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 37,246 psi | 60% | 2382 fps | 98.1% |
| Hodgdon CFE223 | <<locked>> | 80% | 41,075 psi | 66% | 2503 fps | 96.8% |
| Hodgdon H322 | <<locked>> | 80% | 45,034 psi | 73% | 2480 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 45,614 psi | 73% | 2497 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 40,640 psi | 65% | 2431 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 37,449 psi | 60% | 2369 fps | 96.9% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 33,895 psi | 55% | 2320 fps | 95.4% |
| Hodgdon LEVERevolution | 62.6 gr | 80% | 33,504 psi | 54% | 2329 fps | 96.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,425 psi | 41% | 1424 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 36,201 psi | 58% | 2329 fps | 96.4% |
| IMR 3031 | <<locked>> | 80% | 36,361 psi | 59% | 2379 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 35,404 psi | 57% | 2300 fps | 95% |
| IMR 4198 | <<locked>> | 80% | 46,847 psi | 75% | 2428 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 51,793 psi | 83% | 2575 fps | 95.3% |
| IMR 4831 | <<locked>> | 96% | 37,449 psi | 60% | 2411 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 33,866 psi | 55% | 2316 fps | 95.1% |
| IMR 8208 XBR | <<locked>> | 80% | 39,276 psi | 63% | 2375 fps | 98% |
| Lovex D073.5 | <<locked>> | 80% | 43,859 psi | 71% | 2454 fps | 99.4% |
| Lovex D073.6 | <<locked>> | 80% | 35,302 psi | 57% | 2336 fps | 98.6% |
| Lovex S060 | <<locked>> | 80% | 38,130 psi | 61% | 2313 fps | 96.5% |
| Lovex S062 | <<locked>> | 80% | 32,750 psi | 53% | 2254 fps | 96.3% |
| Lovex S065 | <<locked>> | 96% | 44,324 psi | 71% | 2470 fps | 95.2% |
| Norma 200 | <<locked>> | 80% | 51,750 psi | 83% | 2510 fps | 100% |
| Norma 201 | <<locked>> | 80% | 36,289 psi | 58% | 2320 fps | 97.4% |
| Norma 202 | <<locked>> | 80% | 36,390 psi | 59% | 2336 fps | 99.2% |
| Norma 203B | <<locked>> | 82% | 34,737 psi | 56% | 2329 fps | 95.4% |
| Norma URP | <<locked>> | 96% | 39,479 psi | 64% | 2461 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 84% | 36,796 psi | 59% | 2385 fps | 95.8% |
| Ramshot TAC | <<locked>> | 84% | 44,860 psi | 72% | 2470 fps | 95.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 38,261 psi | 62% | 2385 fps | 96.5% |
| Ramshot X-Terminator | <<locked>> | 80% | 42,801 psi | 69% | 2421 fps | 97.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,585 psi | 41% | 1457 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 44,266 psi | 71% | 2461 fps | 99.7% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 47,529 psi | 77% | 2520 fps | 95.2% |
| ReloadSwiss RS 52 | 63.4 gr | 82% | 36,608 psi | 59% | 2421 fps | 95.3% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 28,253 psi | 46% | 2231 fps | 95.1% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 41,713 psi | 67% | 2526 fps | 95.8% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 43,120 psi | 69% | 2539 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 39,856 psi | 64% | 2372 fps | 99.5% |
| Rottweil R 902 | <<locked>> | 80% | 34,563 psi | 56% | 2277 fps | 96.8% |
| Rottweil R 903 | <<locked>> | 84% | 31,937 psi | 51% | 2270 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 96% | 44,324 psi | 71% | 2470 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 35,302 psi | 57% | 2336 fps | 98.6% |
| Shooters World Precision | <<locked>> | 80% | 32,750 psi | 53% | 2254 fps | 96.3% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 46,804 psi | 75% | 2474 fps | 99.1% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 53,156 psi | 86% | 2267 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 49,530 psi | 80% | 2549 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 35,882 psi | 58% | 2372 fps | 95.6% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 46,978 psi | 76% | 2474 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 42,670 psi | 69% | 2441 fps | 95.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 35,911 psi | 58% | 2329 fps | 95.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 38,261 psi | 62% | 2300 fps | 99.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 31,270 psi | 50% | 2172 fps | 98.9% |
| Somchem S321 | <<locked>> | 80% | 42,163 psi | 68% | 2448 fps | 98.9% |
| Somchem S335 | <<locked>> | 80% | 37,565 psi | 61% | 2297 fps | 99.7% |
| Somchem S341 | <<locked>> | 80% | 36,912 psi | 59% | 2339 fps | 96% |
| Somchem S355 | <<locked>> | 84% | 33,141 psi | 53% | 2283 fps | 95.4% |
| Somchem S365 | <<locked>> | 92% | 30,719 psi | 49% | 2303 fps | 95.7% |
| Vihtavuori N130 | <<locked>> | 80% | 43,497 psi | 70% | 2372 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 38,406 psi | 62% | 2303 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 33,504 psi | 54% | 2277 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 34,519 psi | 56% | 2277 fps | 99.1% |
| Vihtavuori N150 | <<locked>> | 82% | 29,472 psi | 47% | 2182 fps | 95.6% |
| Vihtavuori N160 | <<locked>> | 94% | 39,015 psi | 63% | 2415 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 39,218 psi | 63% | 2372 fps | 98.1% |
| Vihtavuori N540 | <<locked>> | 80% | 33,083 psi | 53% | 2260 fps | 98.4% |
| Vihtavuori N550 | <<locked>> | 96% | 40,756 psi | 66% | 2467 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 34,882 psi | 56% | 2300 fps | 95.8% |
| Winchester 748 | <<locked>> | 80% | 38,072 psi | 61% | 2405 fps | 98.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 34,998 psi | 56% | 2329 fps | 96.2% |
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 95 powders for .375 Ruger loaded with the .375 | 250gr | CutEdge Maximus. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,779 fps; across all powders the maximum-charge window runs from 1,591 fps to 2,779 fps. Accurate 4350 gives the best case fill at 100 %, and 95 of the 95 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 250.0 gr projectile in 0.375" calls for a 1:17.0 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Alliant Reloder-17 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 52, Hodgdon LEVERevolution rank at the top here: for .375 Ruger with the .375 | 250gr | CutEdge Maximus 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.