Load Specifications
Bullet Manufacturer:Reichenberg
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 | Reichenberg HDB Universal 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 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% | 54,012 psi | 87% | 2493 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 54,505 psi | 87% | 2582 fps | 99% |
| Accurate 2230 | <<locked>> | 82% | 55,114 psi | 88% | 2592 fps | 99.3% |
| Accurate 2460 | <<locked>> | 88% | 55,985 psi | 90% | 2562 fps | 100% |
| Accurate 2495 | <<locked>> | 96% | 53,708 psi | 86% | 2543 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 53,650 psi | 86% | 2569 fps | 100% |
| Accurate 4064 | <<locked>> | 98% | 53,461 psi | 86% | 2579 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 42,496 psi | 68% | 2484 fps | 96.7% |
| Accurate LT-30 | <<locked>> | 84% | 54,375 psi | 87% | 2448 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 54,824 psi | 88% | 2467 fps | 100% |
| ADI AR 2206H | <<locked>> | 92% | 52,982 psi | 85% | 2575 fps | 99.4% |
| ADI AR 2207 | <<locked>> | 82% | 55,941 psi | 90% | 2461 fps | 100% |
| ADI AR 2208 | <<locked>> | 98% | 54,012 psi | 87% | 2569 fps | 99.1% |
| ADI AR 2219 | <<locked>> | 84% | 54,636 psi | 88% | 2556 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 92% | 55,912 psi | 90% | 2582 fps | 100% |
| Alliant AR-Comp | <<locked>> | 92% | 55,347 psi | 89% | 2562 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 86% | 53,867 psi | 86% | 2631 fps | 99.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 96% | 56,144 psi | 90% | 2726 fps | 99.3% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 56,159 psi | 90% | 2631 fps | 99.9% |
| Alliant Reloder-10x | <<locked>> | 86% | 53,983 psi | 87% | 2500 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 96% | 53,838 psi | 86% | 2605 fps | 99.2% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 43,468 psi | 70% | 2497 fps | 96.9% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 49,922 psi | 80% | 2638 fps | 99.5% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 53,447 psi | 86% | 2448 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 94% | 56,318 psi | 90% | 2638 fps | 99.1% |
| Bofors RP3 | <<locked>> | 98% | 52,837 psi | 85% | 2598 fps | 99.8% |
| Hodgdon Benchmark | <<locked>> | 90% | 54,752 psi | 88% | 2523 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 92% | 54,476 psi | 87% | 2608 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 88% | 52,504 psi | 84% | 2644 fps | 99.1% |
| Hodgdon H322 | <<locked>> | 86% | 53,156 psi | 85% | 2536 fps | 100% |
| Hodgdon H335 | <<locked>> | 86% | 54,215 psi | 87% | 2562 fps | 100% |
| Hodgdon H380 | <<locked>> | 98% | 54,897 psi | 88% | 2612 fps | 98.4% |
| Hodgdon H4895 | <<locked>> | 92% | 53,447 psi | 86% | 2585 fps | 99.7% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 39,436 psi | 63% | 2388 fps | 97.5% |
| Hodgdon LEVERevolution | <<locked>> | 96% | 55,463 psi | 89% | 2661 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,200 psi | 55% | 1519 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 55,114 psi | 88% | 2589 fps | 99.7% |
| IMR 3031 | <<locked>> | 94% | 56,014 psi | 90% | 2618 fps | 100% |
| IMR 4064 | <<locked>> | 96% | 53,403 psi | 86% | 2552 fps | 99.1% |
| IMR 4166 Enduron | <<locked>> | 94% | 54,418 psi | 87% | 2533 fps | 96.1% |
| IMR 4198 | <<locked>> | 86% | 54,810 psi | 88% | 2464 fps | 100% |
| IMR 4451 Enduronᴾ | <<locked>> | 100% | 53,127 psi | 85% | 2546 fps | 95.8% |
| IMR 4831ᴾ | <<locked>> | 100% | 40,886 psi | 66% | 2434 fps | 96.3% |
| IMR 4895 | <<locked>> | 96% | 55,201 psi | 89% | 2638 fps | 99.6% |
| IMR 8208 XBR | <<locked>> | 92% | 55,912 psi | 90% | 2582 fps | 100% |
| Lovex D073.4 | <<locked>> | 82% | 55,854 psi | 90% | 2569 fps | 100% |
| Lovex D073.5 | <<locked>> | 88% | 55,970 psi | 90% | 2572 fps | 100% |
| Lovex D073.6 | <<locked>> | 94% | 55,259 psi | 89% | 2598 fps | 100% |
| Lovex S060 | <<locked>> | 92% | 53,461 psi | 86% | 2510 fps | 99.4% |
| Lovex S062 | <<locked>> | 98% | 55,840 psi | 90% | 2592 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 48,472 psi | 78% | 2490 fps | 96.4% |
| Norma 200 | <<locked>> | 82% | 53,809 psi | 86% | 2474 fps | 100% |
| Norma 201 | <<locked>> | 94% | 54,969 psi | 88% | 2569 fps | 99.9% |
| Norma 202 | <<locked>> | 94% | 55,347 psi | 89% | 2575 fps | 100% |
| Norma 203B | <<locked>> | 98% | 56,391 psi | 90% | 2641 fps | 99.7% |
| Norma URPᴾ | <<locked>> | 100% | 43,091 psi | 69% | 2480 fps | 96.6% |
| Ramshot Big Game | <<locked>> | 96% | 53,388 psi | 86% | 2621 fps | 99.4% |
| Ramshot TAC | <<locked>> | 90% | 52,982 psi | 85% | 2546 fps | 97.5% |
| Ramshot Wild Boar | <<locked>> | 92% | 55,521 psi | 89% | 2615 fps | 99.6% |
| Ramshot X-Terminator | <<locked>> | 88% | 53,780 psi | 86% | 2539 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,505 psi | 55% | 1558 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 88% | 55,767 psi | 89% | 2569 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 98% | 55,637 psi | 89% | 2592 fps | 97% |
| ReloadSwiss RS 52 | <<locked>> | 94% | 53,461 psi | 86% | 2664 fps | 99.2% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 53,417 psi | 86% | 2697 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 42,569 psi | 68% | 2500 fps | 96.2% |
| Rottweil R 901 | <<locked>> | 92% | 55,811 psi | 89% | 2556 fps | 100% |
| Rottweil R 902 | <<locked>> | 96% | 55,230 psi | 89% | 2566 fps | 99.9% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 52,431 psi | 84% | 2585 fps | 99.7% |
| Shooters World AR Plus | <<locked>> | 82% | 55,854 psi | 90% | 2569 fps | 100% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 48,472 psi | 78% | 2490 fps | 96.4% |
| Shooters World Match Rifle | <<locked>> | 94% | 55,259 psi | 89% | 2598 fps | 100% |
| Shooters World Precision | <<locked>> | 98% | 55,840 psi | 90% | 2592 fps | 100% |
| Shooters World Tactical Rifle | <<locked>> | 86% | 55,840 psi | 90% | 2543 fps | 99.9% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 55,056 psi | 88% | 2221 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 54,926 psi | 88% | 2566 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 54,911 psi | 88% | 2648 fps | 99.5% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 55,085 psi | 88% | 2520 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 92% | 54,375 psi | 87% | 2572 fps | 98.2% |
| SNPE Vectan SP 9 | <<locked>> | 94% | 54,737 psi | 88% | 2595 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 54,172 psi | 87% | 2480 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 53,635 psi | 86% | 2477 fps | 100% |
| Somchem S321 | <<locked>> | 88% | 53,563 psi | 86% | 2569 fps | 99.9% |
| Somchem S335 | <<locked>> | 94% | 56,347 psi | 90% | 2520 fps | 100% |
| Somchem S341 | <<locked>> | 92% | 53,867 psi | 86% | 2569 fps | 99.4% |
| Somchem S355ᴾ | <<locked>> | 100% | 53,476 psi | 86% | 2585 fps | 99.6% |
| Somchem S365ᴾ | <<locked>> | 100% | 38,218 psi | 61% | 2434 fps | 98.6% |
| Vihtavuori N120 | <<locked>> | 82% | 55,782 psi | 89% | 2415 fps | 100% |
| Vihtavuori N130 | <<locked>> | 88% | 54,157 psi | 87% | 2454 fps | 100% |
| Vihtavuori N133 | <<locked>> | 92% | 54,041 psi | 87% | 2470 fps | 100% |
| Vihtavuori N135 | <<locked>> | 96% | 54,128 psi | 87% | 2536 fps | 100% |
| Vihtavuori N140 | <<locked>> | 96% | 56,043 psi | 90% | 2556 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 51,605 psi | 83% | 2526 fps | 99.9% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 45,629 psi | 73% | 2487 fps | 97.1% |
| Vihtavuori N530 | <<locked>> | 90% | 53,011 psi | 85% | 2536 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 96% | 53,882 psi | 86% | 2552 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 44,425 psi | 71% | 2487 fps | 96.7% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 46,920 psi | 75% | 2480 fps | 99% |
| Winchester 748 | <<locked>> | 92% | 55,550 psi | 89% | 2625 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 94% | 54,476 psi | 87% | 2605 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% | 39,392 psi | 63% | 2283 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 51,068 psi | 82% | 2530 fps | 98.6% |
| Accurate 2230 | <<locked>> | 80% | 51,329 psi | 82% | 2536 fps | 98.9% |
| Accurate 2460 | <<locked>> | 80% | 42,598 psi | 68% | 2375 fps | 99.9% |
| Accurate 2495 | <<locked>> | 80% | 31,357 psi | 50% | 2192 fps | 99.9% |
| Accurate 2520 | <<locked>> | 80% | 37,782 psi | 61% | 2326 fps | 99.2% |
| Accurate 4064 | <<locked>> | 80% | 29,733 psi | 48% | 2175 fps | 98.4% |
| Accurate 4350 | <<locked>> | 96% | 36,811 psi | 59% | 2379 fps | 95% |
| Accurate LT-30 | <<locked>> | 80% | 48,080 psi | 77% | 2362 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 48,472 psi | 78% | 2382 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 36,129 psi | 58% | 2283 fps | 96.2% |
| ADI AR 2207 | <<locked>> | 80% | 52,591 psi | 84% | 2421 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 37,202 psi | 60% | 2290 fps | 95.6% |
| ADI AR 2219 | <<locked>> | 80% | 47,659 psi | 76% | 2464 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 38,203 psi | 61% | 2303 fps | 98% |
| Alliant AR-Comp | <<locked>> | 80% | 36,912 psi | 59% | 2306 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 44,092 psi | 71% | 2477 fps | 98.7% |
| Alliant Power Pro 2000-MR | 62.5 gr | 84% | 37,188 psi | 60% | 2388 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 31,618 psi | 51% | 2211 fps | 95.7% |
| Alliant Reloder-10x | <<locked>> | 80% | 44,773 psi | 72% | 2375 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 36,622 psi | 59% | 2316 fps | 95.7% |
| Alliant Reloder-16 | <<locked>> | 96% | 38,319 psi | 61% | 2392 fps | 95.2% |
| Alliant Reloder-17 | <<locked>> | 88% | 33,417 psi | 54% | 2313 fps | 95.3% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 47,007 psi | 75% | 2362 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 37,565 psi | 60% | 2333 fps | 95.3% |
| Bofors RP3 | <<locked>> | 82% | 30,632 psi | 49% | 2201 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 40,466 psi | 65% | 2303 fps | 98.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 36,085 psi | 58% | 2313 fps | 98.1% |
| Hodgdon CFE223 | 61 gr | 80% | 39,827 psi | 64% | 2428 fps | 96.7% |
| Hodgdon H322 | <<locked>> | 80% | 43,540 psi | 70% | 2402 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 44,121 psi | 71% | 2418 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 39,175 psi | 63% | 2359 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 36,361 psi | 58% | 2297 fps | 96.9% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 32,590 psi | 52% | 2244 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 32,430 psi | 52% | 2257 fps | 96% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,309 psi | 41% | 1355 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 35,143 psi | 56% | 2254 fps | 96.4% |
| IMR 3031 | <<locked>> | 80% | 35,114 psi | 56% | 2303 fps | 99.9% |
| IMR 4064 | <<locked>> | 82% | 34,374 psi | 55% | 2224 fps | 95% |
| IMR 4166 Enduron | <<locked>> | 92% | 51,126 psi | 82% | 2487 fps | 95.4% |
| IMR 4198 | <<locked>> | 80% | 45,803 psi | 73% | 2346 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 50,125 psi | 80% | 2500 fps | 95.1% |
| IMR 4831 | <<locked>> | 98% | 38,276 psi | 61% | 2385 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 32,808 psi | 53% | 2244 fps | 95.1% |
| IMR 8208 XBR | <<locked>> | 80% | 38,203 psi | 61% | 2303 fps | 98% |
| Lovex D073.4 | <<locked>> | 80% | 52,025 psi | 83% | 2520 fps | 100% |
| Lovex D073.5 | <<locked>> | 80% | 42,409 psi | 68% | 2379 fps | 99.4% |
| Lovex D073.6 | <<locked>> | 80% | 34,113 psi | 55% | 2264 fps | 98.5% |
| Lovex S060 | <<locked>> | 80% | 37,188 psi | 60% | 2241 fps | 96.5% |
| Lovex S062 | <<locked>> | 80% | 31,778 psi | 51% | 2185 fps | 96.2% |
| Lovex S065 | <<locked>> | 96% | 42,714 psi | 68% | 2395 fps | 95% |
| Norma 200 | <<locked>> | 80% | 50,444 psi | 81% | 2431 fps | 100% |
| Norma 201 | <<locked>> | 80% | 35,302 psi | 57% | 2247 fps | 97.4% |
| Norma 202 | <<locked>> | 80% | 35,389 psi | 57% | 2264 fps | 99.2% |
| Norma 203B | <<locked>> | 82% | 33,634 psi | 54% | 2254 fps | 95.4% |
| Norma URP | <<locked>> | 96% | 37,971 psi | 61% | 2385 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 84% | 35,505 psi | 57% | 2313 fps | 95.6% |
| Ramshot TAC | <<locked>> | 84% | 43,497 psi | 70% | 2395 fps | 95.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 36,970 psi | 59% | 2313 fps | 96.4% |
| Ramshot X-Terminator | <<locked>> | 80% | 41,510 psi | 67% | 2346 fps | 97.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,512 psi | 41% | 1391 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 42,960 psi | 69% | 2385 fps | 99.6% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 48,776 psi | 78% | 2493 fps | 95.7% |
| ReloadSwiss RS 52 | 59.2 gr | 82% | 35,389 psi | 57% | 2349 fps | 95.2% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 29,312 psi | 47% | 2218 fps | 96.1% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 39,900 psi | 64% | 2451 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 38,827 psi | 62% | 2297 fps | 99.5% |
| Rottweil R 902 | <<locked>> | 80% | 33,533 psi | 54% | 2201 fps | 96.8% |
| Rottweil R 903 | <<locked>> | 84% | 30,864 psi | 49% | 2201 fps | 95.2% |
| Shooters World AR Plus | <<locked>> | 80% | 52,025 psi | 83% | 2520 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 96% | 42,714 psi | 68% | 2395 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 34,113 psi | 55% | 2264 fps | 98.5% |
| Shooters World Precision | <<locked>> | 80% | 31,778 psi | 51% | 2185 fps | 96.2% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 45,585 psi | 73% | 2398 fps | 99% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 52,359 psi | 84% | 2192 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 47,979 psi | 77% | 2470 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 34,737 psi | 56% | 2303 fps | 95.4% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 45,774 psi | 73% | 2395 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 41,162 psi | 66% | 2365 fps | 95.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 34,693 psi | 56% | 2254 fps | 95.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 37,275 psi | 60% | 2224 fps | 99.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 30,400 psi | 49% | 2100 fps | 98.9% |
| Somchem S321 | <<locked>> | 80% | 40,828 psi | 65% | 2372 fps | 98.8% |
| Somchem S335 | <<locked>> | 80% | 36,593 psi | 59% | 2228 fps | 99.7% |
| Somchem S341 | <<locked>> | 80% | 35,665 psi | 57% | 2267 fps | 95.9% |
| Somchem S355 | <<locked>> | 84% | 32,068 psi | 51% | 2211 fps | 95.3% |
| Somchem S365 | <<locked>> | 92% | 29,515 psi | 47% | 2231 fps | 95.4% |
| Vihtavuori N120 | <<locked>> | 80% | 52,547 psi | 84% | 2375 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 42,424 psi | 68% | 2297 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 37,405 psi | 60% | 2228 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 32,445 psi | 52% | 2201 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 33,431 psi | 54% | 2205 fps | 99.1% |
| Vihtavuori N150 | <<locked>> | 82% | 28,543 psi | 46% | 2113 fps | 95.5% |
| Vihtavuori N160 | <<locked>> | 96% | 40,045 psi | 64% | 2388 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 37,985 psi | 61% | 2297 fps | 98% |
| Vihtavuori N540 | <<locked>> | 80% | 32,010 psi | 51% | 2192 fps | 98.4% |
| Vihtavuori N550 | <<locked>> | 96% | 38,870 psi | 62% | 2388 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 33,692 psi | 54% | 2231 fps | 95.5% |
| Winchester 748 | <<locked>> | 80% | 36,767 psi | 59% | 2329 fps | 98.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 33,678 psi | 54% | 2254 fps | 96% |
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 | Reichenberg HDB Universal. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,726 fps; across all powders the maximum-charge window runs from 1,519 fps to 2,726 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 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- 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 | 270gr | Reichenberg HDB Universal 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.