Load Specifications
Bullet Manufacturer:Woodleigh
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 | Woodleigh PP SN 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 Reloder-17, ReloadSwiss RS 60 and Alliant Power Pro 2000-MR.
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>> | 84% | 53,737 psi | 87% | 2470 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 55,666 psi | 90% | 2536 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 55,622 psi | 90% | 2530 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 54,099 psi | 87% | 2549 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 55,216 psi | 89% | 2530 fps | 96.9% |
| Accurate 4064 | <<locked>> | 92% | 55,579 psi | 90% | 2572 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 55,347 psi | 89% | 2648 fps | 99.6% |
| ADI AR 2206H | <<locked>> | 86% | 52,837 psi | 85% | 2556 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 92% | 53,766 psi | 87% | 2556 fps | 99.7% |
| ADI Benchmark 8208 | <<locked>> | 86% | 55,303 psi | 89% | 2559 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 55,956 psi | 90% | 2536 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 55,796 psi | 90% | 2710 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 53,664 psi | 86% | 2575 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 54,259 psi | 87% | 2595 fps | 99.8% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 53,156 psi | 86% | 2648 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 96% | 54,230 psi | 87% | 2684 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 37,855 psi | 61% | 2408 fps | 98.3% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 42,177 psi | 68% | 2546 fps | 97.4% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 56,115 psi | 90% | 2618 fps | 99.7% |
| Bofors RP3 | <<locked>> | 92% | 54,114 psi | 87% | 2589 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 54,476 psi | 88% | 2559 fps | 97% |
| Hodgdon Benchmark | <<locked>> | 84% | 53,606 psi | 86% | 2500 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 54,549 psi | 88% | 2585 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 52,678 psi | 85% | 2621 fps | 99.7% |
| Hodgdon H322 | <<locked>> | 82% | 55,898 psi | 90% | 2552 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 55,245 psi | 89% | 2602 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 98% | 54,534 psi | 88% | 2641 fps | 97.8% |
| Hodgdon H4350 | <<locked>> | 96% | 55,492 psi | 89% | 2608 fps | 96.6% |
| Hodgdon H4895 | <<locked>> | 86% | 53,403 psi | 86% | 2569 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 49,240 psi | 79% | 2536 fps | 99.8% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 56,057 psi | 90% | 2641 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 55,724 psi | 90% | 2677 fps | 97.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,375 psi | 57% | 1572 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 54,621 psi | 88% | 2569 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 53,055 psi | 85% | 2552 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 53,374 psi | 86% | 2543 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 88% | 53,432 psi | 86% | 2520 fps | 97.4% |
| IMR 4350ᴾ | <<locked>> | 100% | 54,491 psi | 88% | 2579 fps | 97.1% |
| IMR 4451 Enduron | <<locked>> | 94% | 53,026 psi | 85% | 2543 fps | 97.2% |
| IMR 4831ᴾ | <<locked>> | 100% | 52,112 psi | 84% | 2589 fps | 99.4% |
| IMR 4895 | <<locked>> | 90% | 55,651 psi | 90% | 2621 fps | 100% |
| IMR 8208 XBR | <<locked>> | 86% | 55,303 psi | 89% | 2559 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 55,535 psi | 89% | 2546 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 56,072 psi | 90% | 2582 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 55,898 psi | 90% | 2536 fps | 100% |
| Lovex S062 | <<locked>> | 90% | 53,011 psi | 85% | 2536 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 55,521 psi | 89% | 2579 fps | 98.8% |
| Lovex S070 | <<locked>> | 98% | 53,084 psi | 86% | 2566 fps | 97.6% |
| Norma 201 | <<locked>> | 88% | 55,071 psi | 89% | 2556 fps | 100% |
| Norma 202 | <<locked>> | 88% | 55,405 psi | 89% | 2552 fps | 100% |
| Norma 203B | <<locked>> | 90% | 53,432 psi | 86% | 2582 fps | 99.9% |
| Norma 204ᴾ | <<locked>> | 100% | 55,288 psi | 89% | 2621 fps | 95.9% |
| Norma URPᴾ | <<locked>> | 100% | 54,273 psi | 87% | 2635 fps | 99.5% |
| Ramshot Big Game | <<locked>> | 90% | 53,853 psi | 87% | 2605 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 53,156 psi | 86% | 2628 fps | 98.3% |
| Ramshot TAC | <<locked>> | 86% | 55,622 psi | 90% | 2575 fps | 98.9% |
| Ramshot Wild Boar | <<locked>> | 86% | 55,085 psi | 89% | 2592 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 84% | 56,173 psi | 90% | 2559 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,781 psi | 58% | 1608 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 54,621 psi | 88% | 2539 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 55,666 psi | 90% | 2582 fps | 98.3% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 54,592 psi | 88% | 2654 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 53,998 psi | 87% | 2684 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 54,824 psi | 88% | 2664 fps | 99.5% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 54,781 psi | 88% | 2690 fps | 99.3% |
| Rottweil R 901 | <<locked>> | 86% | 55,941 psi | 90% | 2536 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 55,419 psi | 89% | 2552 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 53,983 psi | 87% | 2582 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 54,476 psi | 88% | 2559 fps | 97% |
| Shooters World Long Rifle | <<locked>> | 98% | 55,521 psi | 89% | 2579 fps | 98.8% |
| Shooters World Match Rifle | <<locked>> | 88% | 56,072 psi | 90% | 2582 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 53,011 psi | 85% | 2536 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 53,084 psi | 86% | 2566 fps | 97.6% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 55,782 psi | 90% | 2635 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 53,911 psi | 87% | 2552 fps | 99.1% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 54,636 psi | 88% | 2575 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 53,258 psi | 86% | 2457 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 53,345 psi | 86% | 2457 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 56,086 psi | 90% | 2539 fps | 97.8% |
| Somchem S321 | <<locked>> | 82% | 52,939 psi | 85% | 2543 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 56,014 psi | 90% | 2497 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 53,664 psi | 86% | 2549 fps | 99.9% |
| Somchem S355 | <<locked>> | 94% | 54,462 psi | 88% | 2582 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 48,602 psi | 78% | 2589 fps | 100% |
| Vihtavuori N130 | <<locked>> | 82% | 53,113 psi | 86% | 2428 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 53,461 psi | 86% | 2444 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 55,143 psi | 89% | 2520 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 55,970 psi | 90% | 2533 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 55,941 psi | 90% | 2559 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 53,476 psi | 86% | 2585 fps | 99.3% |
| Vihtavuori N530 | <<locked>> | 86% | 55,724 psi | 90% | 2556 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 54,186 psi | 87% | 2533 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 55,912 psi | 90% | 2635 fps | 99.5% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 41,191 psi | 66% | 2477 fps | 98.2% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 53,925 psi | 87% | 2566 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 55,593 psi | 90% | 2602 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 54,810 psi | 88% | 2644 fps | 97.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 33,881 psi | 55% | 2398 fps | 97.9% |
| Winchester StaBALL Match | <<locked>> | 88% | 54,607 psi | 88% | 2585 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% | 47,413 psi | 76% | 2388 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 52,054 psi | 84% | 2490 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 40,103 psi | 65% | 2320 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 46,992 psi | 76% | 2454 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 48,356 psi | 78% | 2431 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 37,913 psi | 61% | 2313 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 33,997 psi | 55% | 2290 fps | 95.3% |
| ADI AR 2206H | <<locked>> | 80% | 43,642 psi | 70% | 2415 fps | 98.9% |
| ADI AR 2208 | <<locked>> | 80% | 37,130 psi | 60% | 2277 fps | 96.9% |
| ADI Benchmark 8208 | <<locked>> | 80% | 45,716 psi | 74% | 2421 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 80% | 45,847 psi | 74% | 2411 fps | 100% |
| Alliant Power Pro 2000-MR | 68.8 gr | 80% | 39,755 psi | 64% | 2441 fps | 97.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 36,753 psi | 59% | 2300 fps | 98.3% |
| Alliant Reloder-15 | <<locked>> | 80% | 39,407 psi | 63% | 2356 fps | 97.7% |
| Alliant Reloder-16 | <<locked>> | 86% | 34,519 psi | 56% | 2303 fps | 95.4% |
| Alliant Reloder-17 | 67.7 gr | 80% | 31,705 psi | 51% | 2264 fps | 96.2% |
| Alliant Reloder-23 | <<locked>> | 94% | 31,546 psi | 51% | 2260 fps | 96% |
| Alliant Reloder-26 | <<locked>> | 96% | 36,753 psi | 59% | 2431 fps | 95.5% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 42,960 psi | 69% | 2418 fps | 98% |
| Bofors RP3 | <<locked>> | 80% | 36,245 psi | 58% | 2300 fps | 98.3% |
| Bofors RP7 | <<locked>> | 92% | 48,211 psi | 78% | 2464 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 80% | 47,645 psi | 77% | 2415 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 44,643 psi | 72% | 2444 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 49,211 psi | 79% | 2572 fps | 99.4% |
| Hodgdon H322 | <<locked>> | 80% | 52,417 psi | 84% | 2510 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 37,144 psi | 60% | 2303 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 92% | 44,817 psi | 72% | 2490 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 92% | 48,776 psi | 79% | 2507 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 44,063 psi | 71% | 2425 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 29,689 psi | 48% | 2165 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 39,987 psi | 64% | 2398 fps | 99.1% |
| Hodgdon Superformance | <<locked>> | 94% | 48,167 psi | 78% | 2562 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,237 psi | 42% | 1404 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 42,293 psi | 68% | 2382 fps | 99.1% |
| IMR 3031 | <<locked>> | 80% | 43,758 psi | 70% | 2421 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,972 psi | 63% | 2310 fps | 97.6% |
| IMR 4166 Enduron | <<locked>> | 82% | 44,280 psi | 71% | 2375 fps | 95.3% |
| IMR 4350 | <<locked>> | 96% | 48,095 psi | 77% | 2484 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 88% | 44,077 psi | 71% | 2398 fps | 95.1% |
| IMR 4831 | <<locked>> | 88% | 35,186 psi | 57% | 2300 fps | 95.8% |
| IMR 4895 | <<locked>> | 80% | 40,364 psi | 65% | 2382 fps | 98.4% |
| IMR 8208 XBR | <<locked>> | 80% | 45,716 psi | 74% | 2421 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 80% | 51,764 psi | 83% | 2497 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 42,786 psi | 69% | 2398 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 43,874 psi | 71% | 2359 fps | 99% |
| Lovex S062 | <<locked>> | 80% | 38,943 psi | 63% | 2316 fps | 99.1% |
| Lovex S065 | <<locked>> | 86% | 38,580 psi | 62% | 2306 fps | 95.2% |
| Lovex S070 | <<locked>> | 92% | 44,005 psi | 71% | 2421 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 42,801 psi | 69% | 2372 fps | 99.5% |
| Norma 202 | <<locked>> | 80% | 43,163 psi | 70% | 2382 fps | 100% |
| Norma 203B | <<locked>> | 80% | 38,798 psi | 63% | 2346 fps | 98.1% |
| Norma 204 | <<locked>> | 98% | 51,590 psi | 83% | 2569 fps | 95% |
| Norma URP | <<locked>> | 86% | 34,403 psi | 55% | 2293 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 38,392 psi | 62% | 2356 fps | 97.8% |
| Ramshot Hunter | <<locked>> | 92% | 40,915 psi | 66% | 2425 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 45,730 psi | 74% | 2425 fps | 97.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 45,237 psi | 73% | 2448 fps | 99.1% |
| Ramshot X-Terminator | <<locked>> | 80% | 49,443 psi | 80% | 2467 fps | 99.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,672 psi | 43% | 1440 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 51,271 psi | 83% | 2497 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 42,960 psi | 69% | 2385 fps | 95.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 41,234 psi | 66% | 2444 fps | 98.1% |
| ReloadSwiss RS 60 | 67.7 gr | 80% | 33,736 psi | 54% | 2326 fps | 99.1% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 36,260 psi | 58% | 2356 fps | 95.7% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 38,986 psi | 63% | 2415 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 46,760 psi | 75% | 2411 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 40,756 psi | 66% | 2329 fps | 99.3% |
| Rottweil R 903 | <<locked>> | 80% | 34,127 psi | 55% | 2251 fps | 97.5% |
| Rottweil R 907 | <<locked>> | 92% | 48,211 psi | 78% | 2464 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 86% | 38,580 psi | 62% | 2306 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 42,786 psi | 69% | 2398 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 38,943 psi | 63% | 2316 fps | 99.1% |
| Shooters World SW4350 | <<locked>> | 92% | 44,005 psi | 71% | 2421 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,070 psi | 56% | 2293 fps | 96.9% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 43,918 psi | 71% | 2402 fps | 97.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 42,163 psi | 68% | 2385 fps | 98.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 44,179 psi | 71% | 2333 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,695 psi | 59% | 2211 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 43,236 psi | 70% | 2349 fps | 95.1% |
| Somchem S321 | <<locked>> | 80% | 49,588 psi | 80% | 2497 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 43,787 psi | 71% | 2333 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 43,772 psi | 71% | 2402 fps | 98.9% |
| Somchem S355 | <<locked>> | 80% | 35,012 psi | 56% | 2257 fps | 97.5% |
| Somchem S365 | <<locked>> | 82% | 27,108 psi | 44% | 2149 fps | 95.7% |
| Vihtavuori N130 | <<locked>> | 80% | 49,879 psi | 80% | 2385 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 44,483 psi | 72% | 2326 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 40,089 psi | 65% | 2316 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 40,756 psi | 66% | 2323 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 33,257 psi | 54% | 2201 fps | 98.3% |
| Vihtavuori N160 | <<locked>> | 86% | 36,027 psi | 58% | 2297 fps | 95.8% |
| Vihtavuori N530 | <<locked>> | 80% | 45,788 psi | 74% | 2418 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 80% | 39,233 psi | 63% | 2313 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 86% | 35,447 psi | 57% | 2297 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 92% | 31,749 psi | 51% | 2280 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 29,704 psi | 48% | 2133 fps | 95.5% |
| Winchester 748 | <<locked>> | 80% | 45,484 psi | 73% | 2461 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 44,817 psi | 72% | 2490 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 96% | 29,878 psi | 48% | 2280 fps | 95.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 41,568 psi | 67% | 2388 fps | 99% |
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 | Woodleigh PP SN. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,710 fps; across all powders the maximum-charge window runs from 1,572 fps to 2,710 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 Reloder-17, ReloadSwiss RS 60, Alliant Power Pro 2000-MR rank at the top here: for .375 Ruger with the .375 | 270gr | Woodleigh PP 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.