Load Specifications
Bullet:.375 | 270gr | Barnes XLC S
Bullet Manufacturer:Barnes
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:1:6.0
Load data in caliber .375 H&H Mag. with .375 | 270gr | Barnes XLC S bullet and 100 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 ReloadSwiss RS 52.
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>> | 88% | 56,231 psi | 90% | 2497 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 54,737 psi | 88% | 2520 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 54,723 psi | 88% | 2523 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 55,898 psi | 90% | 2572 fps | 100% |
| Accurate 4064 | <<locked>> | 94% | 54,259 psi | 87% | 2559 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 48,631 psi | 78% | 2556 fps | 97.9% |
| Accurate LT-30 | <<locked>> | 82% | 54,926 psi | 88% | 2438 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 55,303 psi | 89% | 2457 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 54,694 psi | 88% | 2575 fps | 99.5% |
| ADI AR 2208 | <<locked>> | 96% | 55,100 psi | 88% | 2566 fps | 99.2% |
| ADI AR 2219 | <<locked>> | 82% | 55,637 psi | 89% | 2549 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 88% | 53,896 psi | 86% | 2536 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 88% | 53,867 psi | 86% | 2520 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 55,608 psi | 89% | 2631 fps | 99.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 53,417 psi | 86% | 2667 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 54,737 psi | 88% | 2592 fps | 99.9% |
| Alliant Reloder-10x | <<locked>> | 84% | 55,854 psi | 90% | 2497 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 55,622 psi | 89% | 2612 fps | 99.4% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 47,863 psi | 77% | 2556 fps | 97.9% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 54,897 psi | 88% | 2694 fps | 99.8% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 53,911 psi | 86% | 2438 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 53,882 psi | 86% | 2585 fps | 98.8% |
| Bofors RP3 | <<locked>> | 96% | 55,695 psi | 89% | 2612 fps | 99.9% |
| Bofors RP7ᴾ | <<locked>> | 100% | 55,985 psi | 90% | 2566 fps | 95.8% |
| Hodgdon Benchmark | <<locked>> | 88% | 55,869 psi | 90% | 2520 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 90% | 56,144 psi | 90% | 2608 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 53,882 psi | 86% | 2641 fps | 99.2% |
| Hodgdon H322 | <<locked>> | 84% | 54,462 psi | 87% | 2533 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 55,463 psi | 89% | 2559 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 53,214 psi | 85% | 2566 fps | 98.2% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 51,663 psi | 83% | 2595 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 90% | 55,129 psi | 88% | 2589 fps | 99.8% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 44,121 psi | 71% | 2451 fps | 98.5% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 53,447 psi | 86% | 2612 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,244 psi | 57% | 1529 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 56,202 psi | 90% | 2585 fps | 99.8% |
| IMR 3031 | <<locked>> | 90% | 54,534 psi | 87% | 2575 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 54,969 psi | 88% | 2556 fps | 99.3% |
| IMR 4166 Enduron | <<locked>> | 92% | 55,463 psi | 89% | 2533 fps | 96.3% |
| IMR 4198 | <<locked>> | 84% | 55,695 psi | 89% | 2457 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 54,404 psi | 87% | 2546 fps | 96% |
| IMR 4831ᴾ | <<locked>> | 100% | 46,340 psi | 74% | 2503 fps | 97.6% |
| IMR 4895 | <<locked>> | 92% | 53,737 psi | 86% | 2595 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 88% | 53,896 psi | 86% | 2536 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 84% | 54,708 psi | 88% | 2530 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 54,070 psi | 87% | 2559 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 54,795 psi | 88% | 2510 fps | 99.5% |
| Lovex S062 | <<locked>> | 94% | 54,752 psi | 88% | 2556 fps | 99.9% |
| Lovex S065ᴾ | <<locked>> | 100% | 53,664 psi | 86% | 2546 fps | 97.4% |
| Lovex S070ᴾ | <<locked>> | 100% | 51,111 psi | 82% | 2526 fps | 95.8% |
| Norma 201 | <<locked>> | 90% | 53,998 psi | 87% | 2533 fps | 99.9% |
| Norma 202 | <<locked>> | 90% | 54,027 psi | 87% | 2536 fps | 100% |
| Norma 203B | <<locked>> | 94% | 54,810 psi | 88% | 2598 fps | 99.6% |
| Norma URPᴾ | <<locked>> | 100% | 48,211 psi | 77% | 2546 fps | 97.7% |
| Ramshot Big Game | <<locked>> | 94% | 54,636 psi | 88% | 2618 fps | 99.5% |
| Ramshot TAC | <<locked>> | 88% | 54,157 psi | 87% | 2543 fps | 97.7% |
| Ramshot Wild Boar | <<locked>> | 88% | 53,287 psi | 85% | 2562 fps | 99.4% |
| Ramshot X-Terminator | <<locked>> | 86% | 55,172 psi | 88% | 2539 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,781 psi | 57% | 1565 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 53,519 psi | 86% | 2520 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 53,853 psi | 86% | 2549 fps | 96.7% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 55,288 psi | 89% | 2667 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 54,752 psi | 88% | 2697 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 48,022 psi | 77% | 2572 fps | 97.5% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 48,820 psi | 78% | 2582 fps | 96.8% |
| Rottweil R 901 | <<locked>> | 88% | 55,709 psi | 89% | 2523 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 54,418 psi | 87% | 2530 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 98% | 55,274 psi | 89% | 2598 fps | 99.8% |
| Rottweil R 907ᴾ | <<locked>> | 100% | 55,985 psi | 90% | 2566 fps | 95.8% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 53,664 psi | 86% | 2546 fps | 97.4% |
| Shooters World Match Rifle | <<locked>> | 90% | 54,070 psi | 87% | 2559 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 54,752 psi | 88% | 2556 fps | 99.9% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 51,111 psi | 82% | 2526 fps | 95.8% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 53,345 psi | 86% | 2490 fps | 99.7% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 56,159 psi | 90% | 2562 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 56,333 psi | 90% | 2651 fps | 99.6% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 56,217 psi | 90% | 2510 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 56,101 psi | 90% | 2572 fps | 98.4% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 56,115 psi | 90% | 2592 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 55,477 psi | 89% | 2477 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 54,723 psi | 88% | 2474 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 53,983 psi | 87% | 2500 fps | 96% |
| Somchem S321 | <<locked>> | 86% | 55,216 psi | 89% | 2569 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 54,839 psi | 88% | 2480 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 55,114 psi | 88% | 2566 fps | 99.5% |
| Somchem S355 | <<locked>> | 98% | 55,622 psi | 89% | 2595 fps | 99.8% |
| Somchem S365ᴾ | <<locked>> | 100% | 43,120 psi | 69% | 2503 fps | 99.4% |
| Vihtavuori N130 | <<locked>> | 86% | 55,593 psi | 89% | 2451 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 55,274 psi | 89% | 2464 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 56,391 psi | 90% | 2539 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 54,215 psi | 87% | 2516 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 53,693 psi | 86% | 2533 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 50,473 psi | 81% | 2543 fps | 98% |
| Vihtavuori N530 | <<locked>> | 88% | 54,476 psi | 87% | 2536 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 94% | 55,579 psi | 89% | 2556 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 49,734 psi | 80% | 2552 fps | 97.8% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 51,517 psi | 83% | 2530 fps | 99.5% |
| Winchester 748 | <<locked>> | 88% | 53,519 psi | 86% | 2579 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 51,663 psi | 83% | 2595 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 92% | 55,811 psi | 89% | 2602 fps | 99.8% |
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% | 44,643 psi | 72% | 2339 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 48,443 psi | 78% | 2434 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 38,290 psi | 61% | 2280 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 43,424 psi | 70% | 2392 fps | 99.8% |
| Accurate 4064 | <<locked>> | 80% | 36,085 psi | 58% | 2267 fps | 99.6% |
| Accurate 4350 | <<locked>> | 92% | 37,681 psi | 60% | 2365 fps | 95.2% |
| Accurate LT-30 | <<locked>> | 80% | 51,967 psi | 83% | 2398 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 52,286 psi | 84% | 2418 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 40,698 psi | 65% | 2346 fps | 97.4% |
| ADI AR 2208 | <<locked>> | 82% | 36,999 psi | 59% | 2257 fps | 95.6% |
| ADI AR 2219 | <<locked>> | 80% | 52,388 psi | 84% | 2507 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 42,525 psi | 68% | 2356 fps | 98.8% |
| Alliant AR-Comp | <<locked>> | 80% | 41,872 psi | 67% | 2359 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 48,994 psi | 79% | 2533 fps | 99.3% |
| Alliant Power Pro 2000-MR | 61.5 gr | 82% | 39,001 psi | 63% | 2405 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 34,272 psi | 55% | 2238 fps | 96.6% |
| Alliant Reloder-10x | <<locked>> | 80% | 49,937 psi | 80% | 2421 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 36,709 psi | 59% | 2287 fps | 95.7% |
| Alliant Reloder-16 | <<locked>> | 92% | 38,130 psi | 61% | 2365 fps | 95.1% |
| Alliant Reloder-17 | <<locked>> | 84% | 33,649 psi | 54% | 2290 fps | 95.3% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 50,763 psi | 81% | 2395 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 39,276 psi | 63% | 2339 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 34,026 psi | 55% | 2244 fps | 96.7% |
| Bofors RP7 | <<locked>> | 98% | 52,649 psi | 84% | 2516 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 44,556 psi | 71% | 2349 fps | 99.4% |
| Hodgdon BL-C2 | <<locked>> | 80% | 40,915 psi | 66% | 2375 fps | 99% |
| Hodgdon CFE223 | <<locked>> | 80% | 44,251 psi | 71% | 2487 fps | 97.8% |
| Hodgdon H322 | <<locked>> | 80% | 48,196 psi | 77% | 2448 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 48,863 psi | 78% | 2467 fps | 100% |
| Hodgdon H380 | <<locked>> | 84% | 39,262 psi | 63% | 2329 fps | 95% |
| Hodgdon H414 | <<locked>> | 98% | 48,486 psi | 78% | 2546 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 41,031 psi | 66% | 2356 fps | 98% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 33,185 psi | 53% | 2231 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 36,927 psi | 59% | 2326 fps | 97.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,469 psi | 42% | 1365 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 39,407 psi | 63% | 2313 fps | 97.6% |
| IMR 3031 | <<locked>> | 80% | 40,016 psi | 64% | 2362 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 36,593 psi | 59% | 2244 fps | 95.7% |
| IMR 4166 Enduron | <<locked>> | 88% | 49,400 psi | 79% | 2438 fps | 95% |
| IMR 4198 | <<locked>> | 80% | 49,690 psi | 80% | 2379 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 96% | 51,329 psi | 82% | 2503 fps | 95.4% |
| IMR 4831 | <<locked>> | 94% | 38,725 psi | 62% | 2369 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 37,536 psi | 60% | 2316 fps | 96.7% |
| IMR 8208 XBR | <<locked>> | 80% | 42,525 psi | 68% | 2356 fps | 98.8% |
| Lovex D073.5 | <<locked>> | 80% | 48,037 psi | 77% | 2438 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 39,711 psi | 64% | 2339 fps | 99.5% |
| Lovex S060 | <<locked>> | 80% | 41,162 psi | 66% | 2290 fps | 97.5% |
| Lovex S062 | <<locked>> | 80% | 36,666 psi | 59% | 2254 fps | 97.7% |
| Lovex S065 | <<locked>> | 92% | 42,786 psi | 69% | 2369 fps | 95% |
| Lovex S070 | <<locked>> | 98% | 48,211 psi | 77% | 2480 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 40,495 psi | 65% | 2313 fps | 98.5% |
| Norma 202 | <<locked>> | 80% | 40,147 psi | 64% | 2323 fps | 99.8% |
| Norma 203B | <<locked>> | 80% | 36,187 psi | 58% | 2280 fps | 96.2% |
| Norma URP | <<locked>> | 92% | 38,043 psi | 61% | 2359 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 35,404 psi | 57% | 2280 fps | 95.6% |
| Ramshot TAC | <<locked>> | 80% | 42,482 psi | 68% | 2356 fps | 95.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 41,524 psi | 67% | 2372 fps | 97.6% |
| Ramshot X-Terminator | <<locked>> | 80% | 45,832 psi | 73% | 2395 fps | 98.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,861 psi | 43% | 1401 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 47,355 psi | 76% | 2431 fps | 99.9% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 47,543 psi | 76% | 2451 fps | 95.4% |
| ReloadSwiss RS 52 | 58.2 gr | 80% | 37,753 psi | 61% | 2369 fps | 96% |
| ReloadSwiss RS 60 | 59.1 gr | 80% | 31,618 psi | 51% | 2251 fps | 97.2% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 39,827 psi | 64% | 2425 fps | 95.3% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 43,134 psi | 69% | 2477 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 44,643 psi | 72% | 2359 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 80% | 38,667 psi | 62% | 2274 fps | 98.1% |
| Rottweil R 903 | <<locked>> | 80% | 32,111 psi | 51% | 2192 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 98% | 52,649 psi | 84% | 2516 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 92% | 42,786 psi | 69% | 2369 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 39,711 psi | 64% | 2339 fps | 99.5% |
| Shooters World Precision | <<locked>> | 80% | 36,666 psi | 59% | 2254 fps | 97.7% |
| Shooters World SW4350 | <<locked>> | 98% | 48,211 psi | 77% | 2480 fps | 95.1% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 49,980 psi | 80% | 2444 fps | 99.5% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 52,823 psi | 85% | 2516 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 34,708 psi | 56% | 2274 fps | 95.4% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 50,140 psi | 80% | 2431 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 40,741 psi | 65% | 2329 fps | 95.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 39,175 psi | 63% | 2316 fps | 97% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 41,684 psi | 67% | 2277 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,548 psi | 55% | 2159 fps | 99.6% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 50,633 psi | 81% | 2457 fps | 95.3% |
| Somchem S321 | <<locked>> | 80% | 45,600 psi | 73% | 2428 fps | 99.4% |
| Somchem S335 | <<locked>> | 80% | 41,336 psi | 66% | 2280 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 40,074 psi | 64% | 2329 fps | 97.1% |
| Somchem S355 | <<locked>> | 80% | 33,040 psi | 53% | 2198 fps | 95.7% |
| Somchem S365 | <<locked>> | 86% | 28,877 psi | 46% | 2178 fps | 95% |
| Vihtavuori N130 | <<locked>> | 80% | 46,862 psi | 75% | 2336 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 41,626 psi | 67% | 2274 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 37,463 psi | 60% | 2264 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 37,927 psi | 61% | 2264 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 80% | 31,227 psi | 50% | 2142 fps | 96.6% |
| Vihtavuori N160 | <<locked>> | 92% | 39,755 psi | 64% | 2359 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 42,656 psi | 68% | 2356 fps | 98.9% |
| Vihtavuori N540 | <<locked>> | 80% | 36,680 psi | 59% | 2257 fps | 99.3% |
| Vihtavuori N550 | <<locked>> | 92% | 38,972 psi | 62% | 2365 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 33,634 psi | 54% | 2205 fps | 95.5% |
| Winchester 748 | <<locked>> | 80% | 41,568 psi | 67% | 2392 fps | 99.3% |
| Winchester 760 | <<locked>> | 98% | 48,689 psi | 78% | 2549 fps | 95% |
| Winchester StaBALL Match | <<locked>> | 80% | 38,334 psi | 61% | 2320 fps | 97.4% |
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 100 powders for .375 H&H Mag. loaded with the .375 | 270gr | Barnes XLC S. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,697 fps; across all powders the maximum-charge window runs from 1,529 fps to 2,697 fps. Accurate 4350 gives the best case fill at 100 %, and 100 of the 100 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 57–90 %, 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-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 60, ReloadSwiss RS 52 rank at the top here: for .375 H&H Mag. with the .375 | 270gr | Barnes XLC S 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.