Load Specifications
Load data in caliber .375 H&H Mag. with .375 | 260gr | Nosler Ballistic Tip 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 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.
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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% | 54,114 psi | 87% | 2539 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 54,389 psi | 87% | 2625 fps | 98.8% |
| Accurate 2230 | <<locked>> | 82% | 55,317 psi | 89% | 2638 fps | 99.1% |
| Accurate 2460 | <<locked>> | 88% | 56,260 psi | 90% | 2612 fps | 100% |
| Accurate 2495 | <<locked>> | 96% | 54,259 psi | 87% | 2595 fps | 100% |
| Accurate 2520 | <<locked>> | 92% | 55,506 psi | 89% | 2651 fps | 100% |
| Accurate 4064 | <<locked>> | 98% | 53,867 psi | 86% | 2631 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 42,583 psi | 68% | 2526 fps | 96.2% |
| Accurate LT-30 | <<locked>> | 84% | 54,534 psi | 87% | 2493 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 54,955 psi | 88% | 2516 fps | 100% |
| ADI AR 2206H | <<locked>> | 94% | 56,434 psi | 90% | 2667 fps | 99.5% |
| ADI AR 2207 | <<locked>> | 82% | 56,043 psi | 90% | 2510 fps | 100% |
| ADI AR 2208 | <<locked>> | 98% | 53,940 psi | 86% | 2612 fps | 98.8% |
| ADI AR 2219 | <<locked>> | 84% | 54,679 psi | 88% | 2605 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 92% | 55,854 psi | 90% | 2628 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 92% | 55,361 psi | 89% | 2612 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 86% | 53,969 psi | 87% | 2677 fps | 99.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 96% | 55,811 psi | 89% | 2766 fps | 99% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 56,246 psi | 90% | 2677 fps | 99.8% |
| Alliant Reloder-10x | <<locked>> | 86% | 54,085 psi | 87% | 2549 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 96% | 53,809 psi | 86% | 2651 fps | 99% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 43,453 psi | 70% | 2533 fps | 96.4% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 49,937 psi | 80% | 2680 fps | 99.2% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 53,432 psi | 86% | 2493 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 94% | 56,028 psi | 90% | 2677 fps | 98.8% |
| Bofors RP3 | <<locked>> | 98% | 53,113 psi | 85% | 2644 fps | 99.7% |
| Hodgdon Benchmark | <<locked>> | 90% | 54,839 psi | 88% | 2572 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 92% | 54,346 psi | 87% | 2654 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 90% | 56,318 psi | 90% | 2743 fps | 99.3% |
| Hodgdon H322 | <<locked>> | 90% | 55,680 psi | 89% | 2618 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 53,969 psi | 87% | 2608 fps | 100% |
| Hodgdon H380 | <<locked>> | 98% | 54,824 psi | 88% | 2651 fps | 98.1% |
| Hodgdon H4198 | <<locked>> | 84% | 56,159 psi | 90% | 2533 fps | 100% |
| Hodgdon H4895 | <<locked>> | 92% | 53,519 psi | 86% | 2631 fps | 99.5% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 39,537 psi | 63% | 2428 fps | 97.1% |
| Hodgdon LEVERevolution | <<locked>> | 98% | 54,969 psi | 88% | 2700 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,490 psi | 55% | 1555 fps | 100% |
| Hodgdon VARGET | <<locked>> | 96% | 53,563 psi | 86% | 2612 fps | 99.5% |
| IMR 3031 | <<locked>> | 96% | 53,911 psi | 86% | 2641 fps | 100% |
| IMR 4064ᴾ | <<locked>> | 100% | 55,593 psi | 89% | 2628 fps | 99.1% |
| IMR 4166 Enduronᴾ | <<locked>> | 100% | 55,796 psi | 89% | 2595 fps | 95.9% |
| IMR 4198 | <<locked>> | 86% | 54,752 psi | 88% | 2513 fps | 100% |
| IMR 4895 | <<locked>> | 96% | 55,129 psi | 88% | 2680 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 92% | 55,854 psi | 90% | 2628 fps | 99.9% |
| Lovex D073.4 | <<locked>> | 82% | 56,086 psi | 90% | 2618 fps | 100% |
| Lovex D073.5 | <<locked>> | 88% | 56,202 psi | 90% | 2618 fps | 100% |
| Lovex D073.6 | <<locked>> | 94% | 55,245 psi | 89% | 2648 fps | 100% |
| Lovex S060 | <<locked>> | 92% | 53,534 psi | 86% | 2556 fps | 99.2% |
| Lovex S062 | <<locked>> | 98% | 55,898 psi | 90% | 2638 fps | 99.9% |
| Lovex S065ᴾ | <<locked>> | 100% | 48,588 psi | 78% | 2533 fps | 96% |
| Norma 200 | <<locked>> | 82% | 54,186 psi | 87% | 2523 fps | 100% |
| Norma 201 | <<locked>> | 94% | 55,230 psi | 89% | 2618 fps | 99.9% |
| Norma 202 | <<locked>> | 94% | 55,332 psi | 89% | 2621 fps | 100% |
| Norma 203B | <<locked>> | 98% | 56,318 psi | 90% | 2687 fps | 99.5% |
| Norma URPᴾ | <<locked>> | 100% | 43,337 psi | 69% | 2526 fps | 96.2% |
| Ramshot Big Game | <<locked>> | 96% | 53,142 psi | 85% | 2661 fps | 99.1% |
| Ramshot TAC | <<locked>> | 90% | 52,939 psi | 85% | 2589 fps | 97.1% |
| Ramshot Wild Boar | <<locked>> | 92% | 55,376 psi | 89% | 2657 fps | 99.4% |
| Ramshot X-Terminator | <<locked>> | 88% | 53,795 psi | 86% | 2582 fps | 99.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,650 psi | 56% | 1591 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 88% | 55,767 psi | 89% | 2618 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 98% | 55,709 psi | 89% | 2635 fps | 96.6% |
| ReloadSwiss RS 52 | <<locked>> | 94% | 53,534 psi | 86% | 2713 fps | 99% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 53,388 psi | 86% | 2743 fps | 100% |
| Rottweil R 901 | <<locked>> | 92% | 56,159 psi | 90% | 2605 fps | 100% |
| Rottweil R 902 | <<locked>> | 96% | 55,477 psi | 89% | 2612 fps | 99.9% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 52,750 psi | 85% | 2631 fps | 99.5% |
| Shooters World AR Plus | <<locked>> | 82% | 56,086 psi | 90% | 2618 fps | 100% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 48,588 psi | 78% | 2533 fps | 96% |
| Shooters World Match Rifle | <<locked>> | 94% | 55,245 psi | 89% | 2648 fps | 100% |
| Shooters World Precision | <<locked>> | 98% | 55,898 psi | 90% | 2638 fps | 99.9% |
| Shooters World Tactical Rifle | <<locked>> | 86% | 55,869 psi | 90% | 2589 fps | 99.8% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 55,259 psi | 89% | 2267 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 54,969 psi | 88% | 2615 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 54,636 psi | 88% | 2690 fps | 99.3% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 55,259 psi | 89% | 2569 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 92% | 54,360 psi | 87% | 2615 fps | 97.8% |
| SNPE Vectan SP 9 | <<locked>> | 94% | 54,853 psi | 88% | 2641 fps | 99.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 54,317 psi | 87% | 2530 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 53,621 psi | 86% | 2523 fps | 100% |
| Somchem S321 | <<locked>> | 88% | 53,635 psi | 86% | 2615 fps | 99.9% |
| Somchem S335 | <<locked>> | 92% | 53,156 psi | 85% | 2526 fps | 100% |
| Somchem S341 | <<locked>> | 92% | 53,708 psi | 86% | 2612 fps | 99.1% |
| Somchem S355ᴾ | <<locked>> | 100% | 53,461 psi | 86% | 2631 fps | 99.5% |
| Somchem S365ᴾ | <<locked>> | 100% | 38,363 psi | 62% | 2474 fps | 98.2% |
| Unknown powderᴾ | <<locked>> | 100% | 47,514 psi | 76% | 2582 fps | 96.5% |
| Vihtavuori N120 | <<locked>> | 82% | 55,854 psi | 90% | 2461 fps | 100% |
| Vihtavuori N130 | <<locked>> | 88% | 54,157 psi | 87% | 2500 fps | 100% |
| Vihtavuori N133 | <<locked>> | 92% | 54,128 psi | 87% | 2516 fps | 100% |
| Vihtavuori N135 | <<locked>> | 96% | 54,143 psi | 87% | 2582 fps | 100% |
| Vihtavuori N140 | <<locked>> | 96% | 55,970 psi | 90% | 2605 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 51,735 psi | 83% | 2572 fps | 99.8% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 45,600 psi | 73% | 2526 fps | 96.6% |
| Vihtavuori N530 | <<locked>> | 90% | 53,055 psi | 85% | 2582 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 96% | 54,070 psi | 87% | 2602 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 44,643 psi | 72% | 2533 fps | 96.3% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 47,007 psi | 75% | 2520 fps | 98.7% |
| Winchester 748 | <<locked>> | 90% | 56,405 psi | 90% | 2684 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 86% | 52,634 psi | 84% | 2625 fps | 99.5% |
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% | 39,827 psi | 64% | 2333 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 51,010 psi | 82% | 2572 fps | 98.3% |
| Accurate 2230 | <<locked>> | 80% | 51,576 psi | 83% | 2585 fps | 98.7% |
| Accurate 2460 | <<locked>> | 80% | 42,946 psi | 69% | 2418 fps | 99.8% |
| Accurate 2495 | <<locked>> | 80% | 32,227 psi | 52% | 2244 fps | 99.9% |
| Accurate 2520 | <<locked>> | 80% | 36,811 psi | 59% | 2356 fps | 98.8% |
| Accurate 4064 | <<locked>> | 80% | 30,516 psi | 49% | 2224 fps | 98.2% |
| Accurate 4350 | <<locked>> | 98% | 39,711 psi | 64% | 2474 fps | 95.4% |
| Accurate LT-30 | <<locked>> | 80% | 48,138 psi | 77% | 2408 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 48,515 psi | 78% | 2425 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 80% | 36,419 psi | 58% | 2326 fps | 95.8% |
| ADI AR 2207 | <<locked>> | 80% | 52,533 psi | 84% | 2467 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 37,521 psi | 60% | 2333 fps | 95.3% |
| ADI AR 2219 | <<locked>> | 80% | 47,863 psi | 77% | 2510 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 38,406 psi | 62% | 2343 fps | 97.7% |
| Alliant AR-Comp | <<locked>> | 80% | 37,130 psi | 60% | 2352 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 44,179 psi | 71% | 2520 fps | 98.4% |
| Alliant Power Pro 2000-MR | 64.6 gr | 86% | 40,016 psi | 64% | 2487 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 31,952 psi | 51% | 2254 fps | 95.4% |
| Alliant Reloder-10x | <<locked>> | 80% | 45,063 psi | 72% | 2421 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 36,825 psi | 59% | 2356 fps | 95.3% |
| Alliant Reloder-16 | <<locked>> | 98% | 40,915 psi | 66% | 2484 fps | 95.6% |
| Alliant Reloder-17 | <<locked>> | 90% | 36,013 psi | 58% | 2411 fps | 95.8% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 46,949 psi | 75% | 2405 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 40,364 psi | 65% | 2425 fps | 95.7% |
| Bofors RP3 | <<locked>> | 82% | 31,212 psi | 50% | 2251 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 40,683 psi | 65% | 2346 fps | 98.6% |
| Hodgdon BL-C2 | <<locked>> | 80% | 36,274 psi | 58% | 2356 fps | 97.8% |
| Hodgdon CFE223 | 61.5 gr | 80% | 39,871 psi | 64% | 2467 fps | 96.2% |
| Hodgdon H322 | <<locked>> | 80% | 40,669 psi | 65% | 2395 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 47,036 psi | 75% | 2507 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 42,293 psi | 68% | 2454 fps | 95.4% |
| Hodgdon H4198 | <<locked>> | 80% | 49,922 psi | 80% | 2451 fps | 100% |
| Hodgdon H4895 | <<locked>> | 80% | 36,680 psi | 59% | 2339 fps | 96.5% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 35,056 psi | 56% | 2336 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 32,938 psi | 53% | 2303 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,527 psi | 41% | 1388 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 32,851 psi | 53% | 2241 fps | 95.1% |
| IMR 3031 | <<locked>> | 80% | 32,401 psi | 52% | 2283 fps | 99.6% |
| IMR 4064 | <<locked>> | 86% | 36,593 psi | 59% | 2306 fps | 95.3% |
| IMR 4166 Enduron | <<locked>> | 98% | 52,721 psi | 85% | 2549 fps | 95.3% |
| IMR 4198 | <<locked>> | 80% | 45,919 psi | 74% | 2395 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 35,346 psi | 57% | 2336 fps | 95.6% |
| IMR 8208 XBR | <<locked>> | 80% | 38,406 psi | 62% | 2343 fps | 97.7% |
| Lovex D073.4 | <<locked>> | 80% | 52,330 psi | 84% | 2569 fps | 100% |
| Lovex D073.5 | <<locked>> | 80% | 42,728 psi | 69% | 2421 fps | 99.2% |
| Lovex D073.6 | <<locked>> | 80% | 34,505 psi | 55% | 2306 fps | 98.3% |
| Lovex S060 | <<locked>> | 80% | 37,449 psi | 60% | 2283 fps | 96.1% |
| Lovex S062 | <<locked>> | 80% | 32,213 psi | 52% | 2228 fps | 95.9% |
| Lovex S065 | <<locked>> | 98% | 45,687 psi | 73% | 2484 fps | 95.3% |
| Norma 200 | <<locked>> | 80% | 50,923 psi | 82% | 2484 fps | 100% |
| Norma 201 | <<locked>> | 80% | 35,795 psi | 57% | 2290 fps | 97.1% |
| Norma 202 | <<locked>> | 80% | 35,737 psi | 57% | 2306 fps | 99.1% |
| Norma 203B | <<locked>> | 82% | 33,910 psi | 54% | 2297 fps | 95% |
| Norma URP | <<locked>> | 98% | 40,654 psi | 65% | 2477 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 84% | 35,766 psi | 57% | 2356 fps | 95.2% |
| Ramshot TAC | <<locked>> | 84% | 43,700 psi | 70% | 2438 fps | 95% |
| Ramshot Wild Boar | <<locked>> | 80% | 37,275 psi | 60% | 2356 fps | 96% |
| Ramshot X-Terminator | <<locked>> | 80% | 41,655 psi | 67% | 2385 fps | 97% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,773 psi | 41% | 1421 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 43,120 psi | 69% | 2428 fps | 99.5% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 49,023 psi | 79% | 2536 fps | 95.2% |
| ReloadSwiss RS 52 | 61.2 gr | 84% | 38,130 psi | 61% | 2444 fps | 95.7% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 29,733 psi | 48% | 2260 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 39,479 psi | 63% | 2343 fps | 99.4% |
| Rottweil R 902 | <<locked>> | 80% | 34,069 psi | 55% | 2247 fps | 96.5% |
| Rottweil R 903 | <<locked>> | 86% | 33,373 psi | 54% | 2293 fps | 95.7% |
| Shooters World AR Plus | <<locked>> | 80% | 52,330 psi | 84% | 2569 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 98% | 45,687 psi | 73% | 2484 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 34,505 psi | 55% | 2306 fps | 98.3% |
| Shooters World Precision | <<locked>> | 80% | 32,213 psi | 52% | 2228 fps | 95.9% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 45,614 psi | 73% | 2441 fps | 98.8% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 52,402 psi | 84% | 2234 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 48,196 psi | 77% | 2520 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 37,231 psi | 60% | 2392 fps | 95.8% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 45,876 psi | 74% | 2441 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 41,510 psi | 67% | 2408 fps | 95% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 35,070 psi | 56% | 2297 fps | 95.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 37,608 psi | 60% | 2267 fps | 99.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 30,748 psi | 49% | 2142 fps | 98.7% |
| Somchem S321 | <<locked>> | 80% | 40,959 psi | 66% | 2415 fps | 98.5% |
| Somchem S335 | <<locked>> | 80% | 36,999 psi | 59% | 2274 fps | 99.6% |
| Somchem S341 | <<locked>> | 80% | 35,824 psi | 57% | 2306 fps | 95.4% |
| Somchem S355 | <<locked>> | 84% | 32,590 psi | 52% | 2257 fps | 95% |
| Somchem S365 | <<locked>> | 92% | 29,950 psi | 48% | 2274 fps | 95% |
| Unknown powder | <<locked>> | 98% | 44,672 psi | 72% | 2533 fps | 95.8% |
| Vihtavuori N120 | <<locked>> | 80% | 52,446 psi | 84% | 2421 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 42,685 psi | 68% | 2343 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 37,652 psi | 60% | 2274 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 32,822 psi | 53% | 2247 fps | 99.9% |
| Vihtavuori N140 | <<locked>> | 80% | 33,721 psi | 54% | 2247 fps | 98.9% |
| Vihtavuori N150 | <<locked>> | 82% | 28,935 psi | 46% | 2156 fps | 95.2% |
| Vihtavuori N160 | <<locked>> | 96% | 40,161 psi | 64% | 2428 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 38,203 psi | 61% | 2339 fps | 97.7% |
| Vihtavuori N540 | <<locked>> | 80% | 32,489 psi | 52% | 2238 fps | 98.2% |
| Vihtavuori N550 | <<locked>> | 98% | 41,727 psi | 67% | 2480 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 33,939 psi | 54% | 2270 fps | 95% |
| Winchester 748 | <<locked>> | 80% | 39,914 psi | 64% | 2431 fps | 98.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 42,453 psi | 68% | 2464 fps | 98% |
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 H&H Mag. loaded with the .375 | 260gr | Nosler Ballistic Tip. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,766 fps; across all powders the maximum-charge window runs from 1,555 fps to 2,766 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 (430 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 260.0 gr projectile in 0.375" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder- TS 15.5, Alliant Reloder-16 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 | 260gr | Nosler Ballistic Tip 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.