Load Specifications
Bullet Manufacturer:Nosler
Bullet Weight:270 gr
Bullet Diameter:0.375"
Bullet Length:<<locked>>
Caliber:.375 H&H Mag. load data
Case Length (l3):2.859"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:95.3 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:24"
Max. allowed Pressure:62,366 psi
Recommended Twist Rate:1:16.5
Load data in caliber .375 H&H Mag. with .375 | 270gr | Nosler CT FailSafe bullet and 101 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 CFE223.
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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 90% | 55,114 psi | 88% | 2497 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 55,317 psi | 89% | 2585 fps | 99.1% |
| Accurate 2230 | <<locked>> | 82% | 56,217 psi | 90% | 2595 fps | 99.4% |
| Accurate 2460 | <<locked>> | 86% | 53,490 psi | 86% | 2520 fps | 100% |
| Accurate 2495 | <<locked>> | 96% | 55,463 psi | 89% | 2552 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 52,939 psi | 85% | 2562 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 52,939 psi | 85% | 2562 fps | 100% |
| Accurate 4064 | <<locked>> | 98% | 55,027 psi | 88% | 2589 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 43,555 psi | 70% | 2490 fps | 96.9% |
| Accurate LT-30 | <<locked>> | 84% | 55,056 psi | 88% | 2448 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 55,463 psi | 89% | 2467 fps | 100% |
| ADI AR 2206H | <<locked>> | 92% | 53,983 psi | 87% | 2579 fps | 99.4% |
| ADI AR 2208 | <<locked>> | 98% | 54,665 psi | 88% | 2569 fps | 99.1% |
| ADI AR 2219 | <<locked>> | 84% | 55,506 psi | 89% | 2559 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 90% | 53,432 psi | 86% | 2539 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 92% | 56,391 psi | 90% | 2562 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 86% | 54,781 psi | 88% | 2635 fps | 99.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 94% | 53,069 psi | 85% | 2671 fps | 98.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 53,708 psi | 86% | 2589 fps | 99.8% |
| Alliant Reloder-10x | <<locked>> | 86% | 54,984 psi | 88% | 2503 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 96% | 54,882 psi | 88% | 2612 fps | 99.3% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 44,179 psi | 71% | 2500 fps | 97% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 50,749 psi | 81% | 2641 fps | 99.5% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 54,215 psi | 87% | 2451 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 92% | 53,374 psi | 86% | 2589 fps | 98.7% |
| Bofors RP3 | <<locked>> | 98% | 54,114 psi | 87% | 2605 fps | 99.9% |
| Hodgdon Benchmark | <<locked>> | 90% | 55,593 psi | 89% | 2526 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 92% | 55,303 psi | 89% | 2612 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 88% | 53,519 psi | 86% | 2648 fps | 99.2% |
| Hodgdon H322 | <<locked>> | 88% | 53,272 psi | 85% | 2530 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 54,621 psi | 88% | 2559 fps | 100% |
| Hodgdon H380 | <<locked>> | 98% | 55,811 psi | 89% | 2612 fps | 98.5% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 52,475 psi | 84% | 2618 fps | 95.8% |
| Hodgdon H4198 | <<locked>> | 82% | 53,606 psi | 86% | 2444 fps | 100% |
| Hodgdon H4895 | <<locked>> | 92% | 54,404 psi | 87% | 2589 fps | 99.7% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 40,422 psi | 65% | 2398 fps | 97.7% |
| Hodgdon LEVERevolution | <<locked>> | 98% | 55,999 psi | 90% | 2657 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,476 psi | 55% | 1519 fps | 100% |
| Hodgdon VARGET | <<locked>> | 96% | 54,491 psi | 87% | 2572 fps | 99.7% |
| IMR 3031 | <<locked>> | 96% | 54,940 psi | 88% | 2595 fps | 100% |
| IMR 4064 | <<locked>> | 98% | 53,345 psi | 86% | 2543 fps | 99.1% |
| IMR 4166 Enduron | <<locked>> | 98% | 53,635 psi | 86% | 2513 fps | 95.9% |
| IMR 4198 | <<locked>> | 86% | 55,434 psi | 89% | 2464 fps | 100% |
| IMR 4451 Enduronᴾ | <<locked>> | 100% | 54,056 psi | 87% | 2552 fps | 95.9% |
| IMR 4895 | <<locked>> | 96% | 56,289 psi | 90% | 2641 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 90% | 53,432 psi | 86% | 2539 fps | 99.9% |
| Lovex D073.4 | <<locked>> | 86% | 56,086 psi | 90% | 2552 fps | 100% |
| Lovex D073.5 | <<locked>> | 86% | 53,505 psi | 86% | 2530 fps | 100% |
| Lovex D073.6 | <<locked>> | 92% | 52,692 psi | 84% | 2559 fps | 100% |
| Lovex S060 | <<locked>> | 92% | 54,302 psi | 87% | 2513 fps | 99.4% |
| Lovex S062 | <<locked>> | 96% | 53,548 psi | 86% | 2556 fps | 99.9% |
| Lovex S065ᴾ | <<locked>> | 100% | 49,356 psi | 79% | 2493 fps | 96.5% |
| Norma 200 | <<locked>> | 82% | 55,056 psi | 88% | 2477 fps | 100% |
| Norma 201 | <<locked>> | 94% | 55,941 psi | 90% | 2572 fps | 100% |
| Norma 202 | <<locked>> | 94% | 56,362 psi | 90% | 2579 fps | 100% |
| Norma 203B | <<locked>> | 96% | 53,969 psi | 87% | 2602 fps | 99.5% |
| Norma URPᴾ | <<locked>> | 100% | 44,121 psi | 71% | 2490 fps | 96.8% |
| Ramshot Big Game | <<locked>> | 96% | 54,186 psi | 87% | 2621 fps | 99.4% |
| Ramshot TAC | <<locked>> | 90% | 53,925 psi | 86% | 2549 fps | 97.6% |
| Ramshot Wild Boar | <<locked>> | 90% | 52,924 psi | 85% | 2569 fps | 99.3% |
| Ramshot X-Terminator | <<locked>> | 88% | 54,708 psi | 88% | 2543 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,867 psi | 56% | 1558 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 53,214 psi | 85% | 2530 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 96% | 52,997 psi | 85% | 2546 fps | 96.5% |
| ReloadSwiss RS 52 | <<locked>> | 94% | 54,505 psi | 87% | 2671 fps | 99.3% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 54,201 psi | 87% | 2700 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 43,685 psi | 70% | 2510 fps | 96.4% |
| Rottweil R 901 | <<locked>> | 90% | 54,012 psi | 87% | 2520 fps | 100% |
| Rottweil R 902 | <<locked>> | 96% | 56,405 psi | 90% | 2569 fps | 100% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 53,737 psi | 86% | 2592 fps | 99.7% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 49,356 psi | 79% | 2493 fps | 96.5% |
| Shooters World Match Rifle | <<locked>> | 92% | 52,692 psi | 84% | 2559 fps | 100% |
| Shooters World Precision | <<locked>> | 96% | 53,548 psi | 86% | 2556 fps | 99.9% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 52,997 psi | 85% | 2497 fps | 99.7% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 55,825 psi | 90% | 2221 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 55,840 psi | 90% | 2569 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 55,666 psi | 89% | 2651 fps | 99.6% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 55,869 psi | 90% | 2520 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 92% | 55,288 psi | 89% | 2575 fps | 98.2% |
| SNPE Vectan SP 9 | <<locked>> | 94% | 55,709 psi | 89% | 2598 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 55,071 psi | 88% | 2484 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 54,259 psi | 87% | 2477 fps | 100% |
| Somchem S321 | <<locked>> | 88% | 54,389 psi | 87% | 2572 fps | 100% |
| Somchem S335 | <<locked>> | 92% | 53,983 psi | 87% | 2484 fps | 100% |
| Somchem S341 | <<locked>> | 92% | 54,607 psi | 88% | 2569 fps | 99.4% |
| Somchem S355ᴾ | <<locked>> | 100% | 54,375 psi | 87% | 2592 fps | 99.7% |
| Somchem S365ᴾ | <<locked>> | 100% | 39,276 psi | 63% | 2444 fps | 98.8% |
| Unknown powderᴾ | <<locked>> | 100% | 48,414 psi | 78% | 2546 fps | 97.1% |
| Vihtavuori N130 | <<locked>> | 88% | 55,027 psi | 88% | 2457 fps | 100% |
| Vihtavuori N133 | <<locked>> | 92% | 54,911 psi | 88% | 2470 fps | 100% |
| Vihtavuori N135 | <<locked>> | 96% | 55,172 psi | 88% | 2539 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 53,519 psi | 86% | 2516 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 52,649 psi | 84% | 2533 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 46,441 psi | 74% | 2490 fps | 97.2% |
| Vihtavuori N530 | <<locked>> | 90% | 53,969 psi | 87% | 2539 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 96% | 54,911 psi | 88% | 2559 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 45,295 psi | 73% | 2493 fps | 96.8% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 47,747 psi | 77% | 2484 fps | 99.1% |
| Winchester 748 | <<locked>> | 88% | 53,519 psi | 86% | 2592 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 52,475 psi | 84% | 2618 fps | 95.8% |
| Winchester StaBALL Match | <<locked>> | 86% | 53,519 psi | 86% | 2582 fps | 99.7% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 40,466 psi | 65% | 2293 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 51,866 psi | 83% | 2533 fps | 98.7% |
| Accurate 2230 | <<locked>> | 80% | 52,373 psi | 84% | 2543 fps | 99% |
| Accurate 2460 | <<locked>> | 80% | 43,801 psi | 70% | 2382 fps | 99.9% |
| Accurate 2495 | <<locked>> | 80% | 32,924 psi | 53% | 2211 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 37,478 psi | 60% | 2320 fps | 99.1% |
| Accurate 2520 | <<locked>> | 80% | 37,478 psi | 60% | 2320 fps | 99.1% |
| Accurate 4064 | <<locked>> | 80% | 31,111 psi | 50% | 2192 fps | 98.7% |
| Accurate 4350 | <<locked>> | 96% | 38,043 psi | 61% | 2392 fps | 95.3% |
| Accurate LT-30 | <<locked>> | 80% | 48,965 psi | 79% | 2365 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 49,356 psi | 79% | 2385 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 37,057 psi | 59% | 2293 fps | 96.4% |
| ADI AR 2208 | <<locked>> | 84% | 35,824 psi | 57% | 2251 fps | 95.1% |
| ADI AR 2219 | <<locked>> | 80% | 48,530 psi | 78% | 2467 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 39,030 psi | 63% | 2310 fps | 98.1% |
| Alliant AR-Comp | <<locked>> | 80% | 37,884 psi | 61% | 2313 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 44,991 psi | 72% | 2484 fps | 98.8% |
| Alliant Power Pro 2000-MR | 62.2 gr | 84% | 38,072 psi | 61% | 2398 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 30,516 psi | 49% | 2172 fps | 95.2% |
| Alliant Reloder-10x | <<locked>> | 80% | 45,948 psi | 74% | 2382 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 35,244 psi | 57% | 2277 fps | 95.2% |
| Alliant Reloder-16 | <<locked>> | 96% | 39,189 psi | 63% | 2402 fps | 95.4% |
| Alliant Reloder-17 | <<locked>> | 88% | 34,360 psi | 55% | 2326 fps | 95.6% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 47,732 psi | 77% | 2365 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 38,450 psi | 62% | 2339 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 29,718 psi | 48% | 2169 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 41,263 psi | 66% | 2310 fps | 99% |
| Hodgdon BL-C2 | <<locked>> | 80% | 37,086 psi | 59% | 2323 fps | 98.3% |
| Hodgdon CFE223 | 60.6 gr | 80% | 40,524 psi | 65% | 2431 fps | 96.8% |
| Hodgdon H322 | <<locked>> | 80% | 41,307 psi | 66% | 2356 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 47,776 psi | 77% | 2467 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 40,234 psi | 65% | 2369 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 98% | 49,240 psi | 79% | 2566 fps | 95.1% |
| Hodgdon H4198 | <<locked>> | 80% | 50,517 psi | 81% | 2405 fps | 100% |
| Hodgdon H4895 | <<locked>> | 80% | 37,318 psi | 60% | 2303 fps | 97.1% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 33,533 psi | 54% | 2254 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 31,430 psi | 50% | 2221 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,570 psi | 41% | 1355 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 33,373 psi | 54% | 2205 fps | 95.7% |
| IMR 3031 | <<locked>> | 80% | 33,156 psi | 53% | 2251 fps | 99.8% |
| IMR 4064 | <<locked>> | 84% | 35,056 psi | 56% | 2228 fps | 95.1% |
| IMR 4166 Enduron | <<locked>> | 96% | 50,444 psi | 81% | 2467 fps | 95.2% |
| IMR 4198 | <<locked>> | 80% | 46,659 psi | 75% | 2349 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 50,778 psi | 81% | 2503 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 33,794 psi | 54% | 2254 fps | 95.4% |
| IMR 8208 XBR | <<locked>> | 80% | 39,030 psi | 63% | 2310 fps | 98.1% |
| Lovex D073.4 | <<locked>> | 80% | 45,600 psi | 73% | 2408 fps | 99.6% |
| Lovex D073.5 | <<locked>> | 80% | 43,584 psi | 70% | 2385 fps | 99.5% |
| Lovex D073.6 | <<locked>> | 80% | 35,244 psi | 57% | 2277 fps | 98.7% |
| Lovex S060 | <<locked>> | 80% | 37,971 psi | 61% | 2247 fps | 96.6% |
| Lovex S062 | <<locked>> | 80% | 32,793 psi | 53% | 2195 fps | 96.5% |
| Lovex S065 | <<locked>> | 96% | 43,801 psi | 70% | 2405 fps | 95.2% |
| Norma 200 | <<locked>> | 80% | 51,663 psi | 83% | 2438 fps | 100% |
| Norma 201 | <<locked>> | 80% | 36,405 psi | 58% | 2257 fps | 97.6% |
| Norma 202 | <<locked>> | 80% | 36,347 psi | 58% | 2270 fps | 99.3% |
| Norma 203B | <<locked>> | 82% | 34,606 psi | 55% | 2267 fps | 95.6% |
| Norma URP | <<locked>> | 96% | 38,798 psi | 62% | 2392 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 82% | 34,084 psi | 55% | 2270 fps | 95% |
| Ramshot TAC | <<locked>> | 84% | 44,411 psi | 71% | 2402 fps | 95.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 37,869 psi | 61% | 2320 fps | 96.5% |
| Ramshot X-Terminator | <<locked>> | 80% | 42,380 psi | 68% | 2352 fps | 97.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,846 psi | 41% | 1388 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 43,845 psi | 70% | 2388 fps | 99.7% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 46,557 psi | 75% | 2448 fps | 95% |
| ReloadSwiss RS 52 | 58.9 gr | 82% | 36,347 psi | 58% | 2359 fps | 95.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 28,253 psi | 45% | 2175 fps | 95.3% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 40,799 psi | 65% | 2457 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 80% | 40,089 psi | 64% | 2306 fps | 99.6% |
| Rottweil R 902 | <<locked>> | 80% | 34,592 psi | 55% | 2211 fps | 97% |
| Rottweil R 903 | <<locked>> | 84% | 31,966 psi | 51% | 2215 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 96% | 43,801 psi | 70% | 2405 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 35,244 psi | 57% | 2277 fps | 98.7% |
| Shooters World Precision | <<locked>> | 80% | 32,793 psi | 53% | 2195 fps | 96.5% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 46,441 psi | 74% | 2402 fps | 99.1% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 53,113 psi | 85% | 2192 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 48,907 psi | 78% | 2477 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 35,476 psi | 57% | 2310 fps | 95.6% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 46,557 psi | 75% | 2395 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 42,264 psi | 68% | 2375 fps | 95.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 35,578 psi | 57% | 2264 fps | 95.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 38,130 psi | 61% | 2231 fps | 99.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 31,198 psi | 50% | 2110 fps | 99% |
| Somchem S321 | <<locked>> | 80% | 41,814 psi | 67% | 2379 fps | 98.9% |
| Somchem S335 | <<locked>> | 80% | 37,550 psi | 60% | 2234 fps | 99.8% |
| Somchem S341 | <<locked>> | 80% | 36,608 psi | 59% | 2277 fps | 96.1% |
| Somchem S355 | <<locked>> | 84% | 33,112 psi | 53% | 2224 fps | 95.7% |
| Somchem S365 | <<locked>> | 92% | 30,530 psi | 49% | 2244 fps | 95.8% |
| Unknown powder | <<locked>> | 96% | 42,815 psi | 69% | 2451 fps | 95.7% |
| Vihtavuori N130 | <<locked>> | 80% | 43,279 psi | 69% | 2300 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 38,189 psi | 61% | 2234 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 33,431 psi | 54% | 2211 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 34,360 psi | 55% | 2215 fps | 99.2% |
| Vihtavuori N150 | <<locked>> | 80% | 27,644 psi | 44% | 2080 fps | 95% |
| Vihtavuori N160 | <<locked>> | 94% | 38,479 psi | 62% | 2349 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 38,885 psi | 62% | 2303 fps | 98.2% |
| Vihtavuori N540 | <<locked>> | 80% | 32,953 psi | 53% | 2201 fps | 98.6% |
| Vihtavuori N550 | <<locked>> | 96% | 39,943 psi | 64% | 2398 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 34,447 psi | 55% | 2238 fps | 95.7% |
| Winchester 748 | <<locked>> | 80% | 40,785 psi | 65% | 2395 fps | 99.2% |
| Winchester 760 | <<locked>> | 98% | 49,240 psi | 79% | 2566 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 43,279 psi | 69% | 2428 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 101 powders for .375 H&H Mag. loaded with the .375 | 270gr | Nosler CT FailSafe. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,700 fps; across all powders the maximum-charge window runs from 1,519 fps to 2,700 fps. Accurate 4350 gives the best case fill at 100 %, and 101 of the 101 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 270.0 gr projectile in 0.375" calls for a 1:16.5 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 CFE223 rank at the top here: for .375 H&H Mag. with the .375 | 270gr | Nosler CT FailSafe 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.