Load Specifications
Bullet Manufacturer:North Fork
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 | NorthFork Bonded Core bullet and 103 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.
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>> | 86% | 54,955 psi | 89% | 2470 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 53,345 psi | 86% | 2493 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 53,127 psi | 86% | 2490 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 55,187 psi | 89% | 2549 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 52,924 psi | 85% | 2480 fps | 96% |
| Accurate 4064 | <<locked>> | 92% | 52,997 psi | 85% | 2530 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 52,199 psi | 84% | 2592 fps | 99.2% |
| ADI AR 2206H | <<locked>> | 88% | 54,157 psi | 87% | 2562 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 94% | 55,071 psi | 89% | 2556 fps | 99.6% |
| ADI Benchmark 8208 | <<locked>> | 86% | 53,156 psi | 86% | 2516 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 53,388 psi | 86% | 2497 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 54,810 psi | 88% | 2612 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 53,301 psi | 86% | 2657 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 54,636 psi | 88% | 2575 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 54,534 psi | 88% | 2474 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 55,274 psi | 89% | 2592 fps | 99.7% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 50,734 psi | 82% | 2595 fps | 99.2% |
| Alliant Reloder-17 | <<locked>> | 98% | 55,376 psi | 89% | 2684 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,172 psi | 58% | 2356 fps | 97.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 39,900 psi | 64% | 2480 fps | 96.2% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 53,635 psi | 86% | 2569 fps | 99.4% |
| Bofors RP3 | <<locked>> | 94% | 55,245 psi | 89% | 2589 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 55,666 psi | 90% | 2556 fps | 96.9% |
| Hodgdon Benchmark | <<locked>> | 86% | 55,114 psi | 89% | 2503 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 55,854 psi | 90% | 2589 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 53,925 psi | 87% | 2628 fps | 99.7% |
| Hodgdon H322 | <<locked>> | 82% | 53,621 psi | 86% | 2513 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 54,853 psi | 88% | 2536 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 52,881 psi | 85% | 2552 fps | 98.8% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 55,637 psi | 90% | 2638 fps | 97.6% |
| Hodgdon H4895 | <<locked>> | 88% | 54,650 psi | 88% | 2569 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 46,862 psi | 75% | 2487 fps | 99.5% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 53,534 psi | 86% | 2595 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 52,881 psi | 85% | 2615 fps | 96.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,201 psi | 57% | 1552 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 55,956 psi | 90% | 2572 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 54,273 psi | 87% | 2556 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 54,578 psi | 88% | 2543 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 90% | 54,853 psi | 88% | 2523 fps | 97.3% |
| IMR 4198 | <<locked>> | 82% | 54,839 psi | 88% | 2438 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 52,185 psi | 84% | 2530 fps | 96.3% |
| IMR 4451 Enduron | <<locked>> | 96% | 54,317 psi | 88% | 2543 fps | 97.1% |
| IMR 4831ᴾ | <<locked>> | 100% | 49,530 psi | 80% | 2536 fps | 98.9% |
| IMR 4895 | <<locked>> | 90% | 53,301 psi | 86% | 2575 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 86% | 53,156 psi | 86% | 2516 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 53,171 psi | 86% | 2503 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 53,417 psi | 86% | 2536 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 53,882 psi | 87% | 2497 fps | 99.8% |
| Lovex S062 | <<locked>> | 92% | 54,099 psi | 87% | 2539 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 53,200 psi | 86% | 2533 fps | 98.3% |
| Lovex S070ᴾ | <<locked>> | 100% | 54,041 psi | 87% | 2562 fps | 97.4% |
| Norma 201 | <<locked>> | 88% | 52,852 psi | 85% | 2510 fps | 100% |
| Norma 202 | <<locked>> | 88% | 53,142 psi | 86% | 2513 fps | 100% |
| Norma 203B | <<locked>> | 92% | 54,433 psi | 88% | 2582 fps | 99.9% |
| Norma URPᴾ | <<locked>> | 100% | 51,605 psi | 83% | 2582 fps | 99% |
| Ramshot Big Game | <<locked>> | 92% | 55,042 psi | 89% | 2605 fps | 99.8% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 50,720 psi | 82% | 2575 fps | 97.6% |
| Ramshot TAC | <<locked>> | 86% | 53,490 psi | 86% | 2530 fps | 98.4% |
| Ramshot Wild Boar | <<locked>> | 86% | 52,953 psi | 85% | 2549 fps | 99.7% |
| Ramshot X-Terminator | <<locked>> | 84% | 54,070 psi | 87% | 2516 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,621 psi | 57% | 1591 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 56,072 psi | 90% | 2543 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 53,345 psi | 86% | 2533 fps | 97.6% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 55,738 psi | 90% | 2654 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 55,230 psi | 89% | 2684 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 51,793 psi | 83% | 2608 fps | 99% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 52,315 psi | 84% | 2635 fps | 98.7% |
| Rottweil R 901 | <<locked>> | 86% | 53,911 psi | 87% | 2497 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 53,243 psi | 86% | 2510 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 54,853 psi | 88% | 2579 fps | 100% |
| Rottweil R 907 | <<locked>> | 98% | 55,666 psi | 90% | 2556 fps | 96.9% |
| Shooters World Long Rifle | <<locked>> | 98% | 53,200 psi | 86% | 2533 fps | 98.3% |
| Shooters World Match Rifle | <<locked>> | 88% | 53,417 psi | 86% | 2536 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 54,099 psi | 87% | 2539 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 54,041 psi | 87% | 2562 fps | 97.4% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 55,985 psi | 90% | 2520 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 53,301 psi | 86% | 2589 fps | 99.8% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 55,608 psi | 90% | 2497 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 55,332 psi | 89% | 2556 fps | 99% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 55,970 psi | 90% | 2579 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 54,723 psi | 88% | 2461 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 54,418 psi | 88% | 2454 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 53,867 psi | 87% | 2490 fps | 97.1% |
| Somchem S321 | <<locked>> | 84% | 54,346 psi | 88% | 2546 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 53,896 psi | 87% | 2461 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 54,824 psi | 88% | 2549 fps | 99.8% |
| Somchem S355 | <<locked>> | 96% | 55,332 psi | 89% | 2575 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 46,035 psi | 74% | 2536 fps | 100% |
| Vihtavuori N130 | <<locked>> | 84% | 54,302 psi | 87% | 2428 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 54,810 psi | 88% | 2448 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 56,144 psi | 90% | 2520 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 53,664 psi | 86% | 2493 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 53,388 psi | 86% | 2513 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 54,215 psi | 87% | 2579 fps | 99.2% |
| Vihtavuori N530 | <<locked>> | 86% | 53,563 psi | 86% | 2516 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 55,347 psi | 89% | 2533 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 53,258 psi | 86% | 2585 fps | 99.1% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 38,740 psi | 62% | 2421 fps | 97.4% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 55,042 psi | 89% | 2562 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 53,200 psi | 86% | 2559 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 55,637 psi | 90% | 2638 fps | 97.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 32,285 psi | 52% | 2333 fps | 96.5% |
| Winchester StaBALL Match | <<locked>> | 90% | 55,753 psi | 90% | 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% | 45,716 psi | 74% | 2352 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 49,980 psi | 81% | 2451 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 38,261 psi | 62% | 2280 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 44,962 psi | 72% | 2411 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 49,603 psi | 80% | 2431 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 36,172 psi | 58% | 2270 fps | 99.8% |
| Accurate 4350 | <<locked>> | 88% | 34,476 psi | 56% | 2293 fps | 95.2% |
| ADI AR 2206H | <<locked>> | 80% | 42,076 psi | 68% | 2372 fps | 98.5% |
| ADI AR 2208 | <<locked>> | 80% | 35,824 psi | 58% | 2238 fps | 96.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,092 psi | 71% | 2382 fps | 99.5% |
| Alliant AR-Comp | <<locked>> | 80% | 43,932 psi | 71% | 2375 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 51,401 psi | 83% | 2562 fps | 99.9% |
| Alliant Power Pro 2000-MR | 65.9 gr | 80% | 37,971 psi | 61% | 2385 fps | 96.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,201 psi | 57% | 2257 fps | 97.7% |
| Alliant Reloder-10x | <<locked>> | 80% | 51,430 psi | 83% | 2434 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 37,840 psi | 61% | 2310 fps | 97% |
| Alliant Reloder-16 | <<locked>> | 88% | 35,157 psi | 57% | 2303 fps | 95.2% |
| Alliant Reloder-17 | 64.9 gr | 80% | 30,342 psi | 49% | 2215 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 96% | 31,923 psi | 51% | 2254 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 98% | 37,289 psi | 60% | 2425 fps | 95.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 41,089 psi | 66% | 2372 fps | 97.3% |
| Bofors RP3 | <<locked>> | 80% | 34,534 psi | 56% | 2254 fps | 97.6% |
| Bofors RP7 | <<locked>> | 94% | 49,226 psi | 79% | 2464 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 45,861 psi | 74% | 2372 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 42,569 psi | 69% | 2398 fps | 99.7% |
| Hodgdon CFE223 | <<locked>> | 80% | 46,920 psi | 76% | 2523 fps | 98.9% |
| Hodgdon H322 | <<locked>> | 80% | 50,343 psi | 81% | 2467 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 51,198 psi | 82% | 2490 fps | 100% |
| Hodgdon H380 | <<locked>> | 82% | 38,014 psi | 61% | 2306 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 94% | 45,542 psi | 73% | 2487 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 42,409 psi | 68% | 2382 fps | 98.9% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 30,095 psi | 48% | 2162 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,203 psi | 62% | 2352 fps | 98.5% |
| Hodgdon Superformance | <<locked>> | 96% | 49,255 psi | 79% | 2559 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,063 psi | 42% | 1385 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,756 psi | 66% | 2339 fps | 98.6% |
| IMR 3031 | <<locked>> | 80% | 41,742 psi | 67% | 2382 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,565 psi | 61% | 2267 fps | 97% |
| IMR 4166 Enduron | <<locked>> | 84% | 45,440 psi | 73% | 2379 fps | 95.2% |
| IMR 4198 | <<locked>> | 80% | 51,677 psi | 83% | 2402 fps | 100% |
| IMR 4350 | <<locked>> | 98% | 49,066 psi | 79% | 2484 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 90% | 45,179 psi | 73% | 2402 fps | 95% |
| IMR 4831 | <<locked>> | 90% | 35,679 psi | 57% | 2300 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 38,754 psi | 62% | 2339 fps | 97.8% |
| IMR 8208 XBR | <<locked>> | 80% | 44,092 psi | 71% | 2382 fps | 99.5% |
| Lovex D073.5 | <<locked>> | 80% | 49,748 psi | 80% | 2457 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 40,901 psi | 66% | 2356 fps | 99.9% |
| Lovex S060 | <<locked>> | 80% | 42,351 psi | 68% | 2320 fps | 98.5% |
| Lovex S062 | <<locked>> | 80% | 37,347 psi | 60% | 2270 fps | 98.6% |
| Lovex S065 | <<locked>> | 88% | 39,291 psi | 63% | 2306 fps | 95% |
| Lovex S070 | <<locked>> | 94% | 44,759 psi | 72% | 2421 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 41,162 psi | 66% | 2329 fps | 99.2% |
| Norma 202 | <<locked>> | 80% | 41,437 psi | 67% | 2343 fps | 100% |
| Norma 203B | <<locked>> | 80% | 37,231 psi | 60% | 2300 fps | 97.4% |
| Norma URP | <<locked>> | 88% | 34,998 psi | 56% | 2293 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 36,622 psi | 59% | 2306 fps | 97% |
| Ramshot Hunter | <<locked>> | 94% | 41,727 psi | 67% | 2428 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 43,947 psi | 71% | 2379 fps | 96.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 43,250 psi | 70% | 2398 fps | 98.6% |
| Ramshot X-Terminator | <<locked>> | 80% | 47,543 psi | 77% | 2421 fps | 99.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,498 psi | 43% | 1421 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 49,429 psi | 80% | 2457 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 43,961 psi | 71% | 2388 fps | 95.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 39,334 psi | 63% | 2398 fps | 97.4% |
| ReloadSwiss RS 60 | 64.9 gr | 80% | 32,285 psi | 52% | 2277 fps | 98.5% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 36,709 psi | 59% | 2356 fps | 95.5% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 39,885 psi | 64% | 2415 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 80% | 45,107 psi | 73% | 2372 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 39,146 psi | 63% | 2287 fps | 98.8% |
| Rottweil R 903 | <<locked>> | 80% | 32,561 psi | 52% | 2205 fps | 96.7% |
| Rottweil R 907 | <<locked>> | 94% | 49,226 psi | 79% | 2464 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 88% | 39,291 psi | 63% | 2306 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 40,901 psi | 66% | 2356 fps | 99.9% |
| Shooters World Precision | <<locked>> | 80% | 37,347 psi | 60% | 2270 fps | 98.6% |
| Shooters World SW4350 | <<locked>> | 94% | 44,759 psi | 72% | 2421 fps | 95.4% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 52,199 psi | 84% | 2470 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 33,576 psi | 54% | 2247 fps | 96% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 52,185 psi | 84% | 2454 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 42,163 psi | 68% | 2356 fps | 96.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 40,524 psi | 65% | 2343 fps | 98.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 42,641 psi | 69% | 2293 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,273 psi | 57% | 2175 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 47,152 psi | 76% | 2398 fps | 95.7% |
| Somchem S321 | <<locked>> | 80% | 47,558 psi | 77% | 2451 fps | 99.9% |
| Somchem S335 | <<locked>> | 80% | 42,177 psi | 68% | 2297 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 41,858 psi | 67% | 2356 fps | 98.3% |
| Somchem S355 | <<locked>> | 80% | 33,518 psi | 54% | 2215 fps | 96.7% |
| Somchem S365 | <<locked>> | 84% | 27,528 psi | 44% | 2149 fps | 95.5% |
| Vihtavuori N130 | <<locked>> | 80% | 48,240 psi | 78% | 2352 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 42,859 psi | 69% | 2290 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 38,406 psi | 62% | 2277 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,146 psi | 63% | 2283 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 31,821 psi | 51% | 2159 fps | 97.6% |
| Vihtavuori N160 | <<locked>> | 88% | 36,724 psi | 59% | 2297 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 43,990 psi | 71% | 2375 fps | 99.6% |
| Vihtavuori N540 | <<locked>> | 80% | 37,652 psi | 61% | 2274 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 88% | 35,926 psi | 58% | 2297 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 96% | 34,113 psi | 55% | 2326 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 30,284 psi | 49% | 2133 fps | 95.3% |
| Winchester 748 | <<locked>> | 80% | 43,468 psi | 70% | 2418 fps | 99.8% |
| Winchester 760 | <<locked>> | 94% | 45,716 psi | 74% | 2490 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 98% | 30,298 psi | 49% | 2274 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 39,813 psi | 64% | 2346 fps | 98.5% |
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 103 powders for .375 Ruger loaded with the .375 | 270gr | NorthFork Bonded Core. Alliant Reloder-17 delivers the highest muzzle velocity at 2,684 fps; across all powders the maximum-charge window runs from 1,552 fps to 2,684 fps. Accurate 4350 gives the best case fill at 100 %, and 103 of the 103 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (428 MPa), the top charges use 52–90 %, 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 | NorthFork Bonded Core 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.