Load Specifications
Bullet:.375 | 300gr | Woodleigh FMJ
Bullet Manufacturer:Woodleigh
Bullet Weight:300 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 | 300gr | Woodleigh FMJ bullet and 104 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, Alliant Reloder-17 and ReloadSwiss RS 60.
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>> | 86% | 55,506 psi | 89% | 2385 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 53,737 psi | 86% | 2411 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 53,447 psi | 86% | 2405 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 53,925 psi | 86% | 2457 fps | 100% |
| Accurate 2700 | <<locked>> | 94% | 54,157 psi | 87% | 2411 fps | 96.9% |
| Accurate 4064 | <<locked>> | 92% | 53,461 psi | 86% | 2448 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 52,533 psi | 84% | 2520 fps | 99.5% |
| ADI AR 2206H | <<locked>> | 88% | 54,418 psi | 87% | 2477 fps | 100% |
| ADI AR 2208 | <<locked>> | 94% | 55,317 psi | 89% | 2476 fps | 99.9% |
| ADI Benchmark 8208 | <<locked>> | 86% | 53,534 psi | 86% | 2434 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 54,070 psi | 87% | 2411 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 55,405 psi | 89% | 2526 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 53,722 psi | 86% | 2582 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 55,056 psi | 88% | 2496 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 55,158 psi | 88% | 2385 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 55,637 psi | 89% | 2514 fps | 99.9% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 52,431 psi | 84% | 2522 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 98% | 56,333 psi | 90% | 2606 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,738 psi | 59% | 2291 fps | 98.2% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 40,350 psi | 65% | 2422 fps | 97.1% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 53,954 psi | 87% | 2493 fps | 99.7% |
| Bofors RP3 | <<locked>> | 94% | 55,608 psi | 89% | 2510 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 55,825 psi | 90% | 2481 fps | 97.5% |
| Hodgdon Benchmark | <<locked>> | 86% | 55,564 psi | 89% | 2420 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 56,072 psi | 90% | 2507 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 54,346 psi | 87% | 2546 fps | 99.9% |
| Hodgdon H322 | <<locked>> | 84% | 53,650 psi | 86% | 2419 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 53,127 psi | 85% | 2475 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 96% | 53,722 psi | 86% | 2539 fps | 97.9% |
| Hodgdon H4350ᴾ | <<locked>> | 100% | 54,607 psi | 88% | 2500 fps | 96.7% |
| Hodgdon H4895 | <<locked>> | 88% | 54,911 psi | 88% | 2486 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 47,819 psi | 77% | 2415 fps | 99.8% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 53,882 psi | 86% | 2516 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 53,780 psi | 86% | 2551 fps | 97.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,042 psi | 58% | 1471 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 54,911 psi | 88% | 2470 fps | 100% |
| IMR 3031 | <<locked>> | 92% | 56,362 psi | 90% | 2487 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 54,012 psi | 87% | 2451 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 94% | 53,751 psi | 86% | 2425 fps | 97.7% |
| IMR 4198 | <<locked>> | 82% | 55,317 psi | 89% | 2346 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 52,388 psi | 84% | 2457 fps | 96.9% |
| IMR 4451 Enduron | <<locked>> | 96% | 54,433 psi | 87% | 2464 fps | 97.7% |
| IMR 4831ᴾ | <<locked>> | 100% | 45,049 psi | 72% | 2385 fps | 98.6% |
| IMR 4895 | <<locked>> | 90% | 53,737 psi | 86% | 2498 fps | 100% |
| IMR 8208 XBR | <<locked>> | 86% | 53,534 psi | 86% | 2434 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 53,693 psi | 86% | 2422 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 53,925 psi | 86% | 2457 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 54,389 psi | 87% | 2414 fps | 100% |
| Lovex S062 | <<locked>> | 92% | 54,491 psi | 87% | 2457 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 54,172 psi | 87% | 2459 fps | 98.7% |
| Lovex S070ᴾ | <<locked>> | 100% | 54,723 psi | 88% | 2488 fps | 98% |
| Norma 201 | <<locked>> | 88% | 53,229 psi | 85% | 2429 fps | 100% |
| Norma 202 | <<locked>> | 88% | 53,751 psi | 86% | 2432 fps | 100% |
| Norma 203B | <<locked>> | 92% | 54,781 psi | 88% | 2502 fps | 100% |
| Norma URPᴾ | <<locked>> | 100% | 52,823 psi | 85% | 2508 fps | 99.4% |
| Ramshot Big Game | <<locked>> | 92% | 55,201 psi | 89% | 2527 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 52,228 psi | 84% | 2505 fps | 98.1% |
| Ramshot TAC | <<locked>> | 86% | 53,882 psi | 86% | 2454 fps | 98.9% |
| Ramshot Wild Boar | <<locked>> | 86% | 53,287 psi | 85% | 2469 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 84% | 54,447 psi | 87% | 2436 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,042 psi | 58% | 1507 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 53,142 psi | 85% | 2417 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 53,737 psi | 86% | 2461 fps | 98.2% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 56,057 psi | 90% | 2574 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 55,303 psi | 89% | 2604 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 52,649 psi | 84% | 2538 fps | 99.3% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 52,997 psi | 85% | 2564 fps | 99.1% |
| Rottweil R 901 | <<locked>> | 86% | 54,433 psi | 87% | 2413 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 53,635 psi | 86% | 2426 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 55,245 psi | 89% | 2500 fps | 100% |
| Rottweil R 907 | <<locked>> | 98% | 55,825 psi | 90% | 2481 fps | 97.5% |
| Shooters World Long Rifle | <<locked>> | 98% | 54,172 psi | 87% | 2459 fps | 98.7% |
| Shooters World Match Rifle | <<locked>> | 88% | 53,925 psi | 86% | 2457 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 54,491 psi | 87% | 2457 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 54,186 psi | 87% | 2487 fps | 98% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 56,217 psi | 90% | 2435 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 53,592 psi | 86% | 2513 fps | 99.9% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 56,057 psi | 90% | 2405 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 55,637 psi | 89% | 2479 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 56,130 psi | 90% | 2497 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 55,027 psi | 88% | 2375 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 54,911 psi | 88% | 2374 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 53,954 psi | 87% | 2418 fps | 97.6% |
| Somchem S321 | <<locked>> | 84% | 54,752 psi | 88% | 2466 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 54,215 psi | 87% | 2374 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 55,085 psi | 88% | 2471 fps | 100% |
| Somchem S355 | <<locked>> | 96% | 55,564 psi | 89% | 2496 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 47,500 psi | 76% | 2465 fps | 100% |
| Unknown powder | <<locked>> | 98% | 53,011 psi | 85% | 2515 fps | 99.2% |
| Vihtavuori N130 | <<locked>> | 84% | 53,896 psi | 86% | 2332 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 54,505 psi | 87% | 2356 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 53,185 psi | 85% | 2395 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 53,330 psi | 86% | 2405 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 54,230 psi | 87% | 2439 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 53,621 psi | 86% | 2491 fps | 99.5% |
| Vihtavuori N530 | <<locked>> | 84% | 53,214 psi | 85% | 2438 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 56,391 psi | 90% | 2472 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 53,824 psi | 86% | 2535 fps | 99.5% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 39,175 psi | 63% | 2359 fps | 98.1% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 55,608 psi | 89% | 2492 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 54,331 psi | 87% | 2486 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 53,722 psi | 86% | 2539 fps | 97.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 32,489 psi | 52% | 2279 fps | 97.5% |
| Winchester StaBALL Match | <<locked>> | 82% | 53,766 psi | 86% | 2478 fps | 100% |
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% | 46,238 psi | 74% | 2267 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 50,386 psi | 81% | 2369 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 38,856 psi | 62% | 2205 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 43,903 psi | 70% | 2320 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 47,543 psi | 76% | 2316 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 36,738 psi | 59% | 2198 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 32,430 psi | 52% | 2178 fps | 95.3% |
| ADI AR 2206H | <<locked>> | 80% | 42,395 psi | 68% | 2295 fps | 99% |
| ADI AR 2208 | <<locked>> | 80% | 36,114 psi | 58% | 2166 fps | 97% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,411 psi | 71% | 2303 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 80% | 44,353 psi | 71% | 2290 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 51,851 psi | 83% | 2477 fps | 100% |
| Alliant Power Pro 2000-MR | 62.5 gr | 80% | 38,392 psi | 62% | 2320 fps | 97.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,578 psi | 57% | 2187 fps | 98.4% |
| Alliant Reloder-10x | <<locked>> | 80% | 51,909 psi | 83% | 2345 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,145 psi | 61% | 2238 fps | 97.8% |
| Alliant Reloder-16 | <<locked>> | 86% | 33,388 psi | 54% | 2192 fps | 95.5% |
| Alliant Reloder-17 | 61.5 gr | 80% | 30,603 psi | 49% | 2154 fps | 96.2% |
| Alliant Reloder-23 | <<locked>> | 94% | 30,298 psi | 49% | 2152 fps | 95.9% |
| Alliant Reloder-26 | <<locked>> | 96% | 34,954 psi | 56% | 2311 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 41,437 psi | 66% | 2299 fps | 98% |
| Bofors RP3 | <<locked>> | 80% | 35,056 psi | 56% | 2189 fps | 98.4% |
| Bofors RP7 | <<locked>> | 92% | 46,499 psi | 75% | 2345 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,470 psi | 75% | 2295 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 43,033 psi | 69% | 2323 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 47,224 psi | 76% | 2444 fps | 99.4% |
| Hodgdon H322 | <<locked>> | 80% | 47,195 psi | 76% | 2333 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 35,940 psi | 58% | 2190 fps | 95.8% |
| Hodgdon H414 | <<locked>> | 88% | 41,075 psi | 66% | 2337 fps | 95% |
| Hodgdon H4350 | <<locked>> | 96% | 48,298 psi | 77% | 2408 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 42,728 psi | 69% | 2305 fps | 99.4% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 28,703 psi | 46% | 2058 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 36,390 psi | 58% | 2238 fps | 98.7% |
| Hodgdon Superformance | <<locked>> | 94% | 45,992 psi | 74% | 2439 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,339 psi | 42% | 1313 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 38,072 psi | 61% | 2208 fps | 98.6% |
| IMR 3031 | <<locked>> | 80% | 38,754 psi | 62% | 2244 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 35,476 psi | 57% | 2149 fps | 97.1% |
| IMR 4166 Enduron | <<locked>> | 86% | 42,496 psi | 68% | 2250 fps | 95.2% |
| IMR 4198 | <<locked>> | 80% | 52,243 psi | 84% | 2309 fps | 100% |
| IMR 4350 | <<locked>> | 96% | 46,340 psi | 74% | 2369 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 88% | 42,699 psi | 68% | 2283 fps | 95.1% |
| IMR 4831 | <<locked>> | 90% | 32,518 psi | 52% | 2163 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 39,073 psi | 63% | 2265 fps | 98.5% |
| IMR 8208 XBR | <<locked>> | 80% | 44,411 psi | 71% | 2302 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 80% | 50,096 psi | 80% | 2375 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 41,249 psi | 66% | 2279 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 42,815 psi | 69% | 2243 fps | 99.1% |
| Lovex S062 | <<locked>> | 80% | 37,855 psi | 61% | 2202 fps | 99.1% |
| Lovex S065 | <<locked>> | 86% | 37,318 psi | 60% | 2194 fps | 95.2% |
| Lovex S070 | <<locked>> | 92% | 42,366 psi | 68% | 2306 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 41,684 psi | 67% | 2256 fps | 99.6% |
| Norma 202 | <<locked>> | 80% | 41,872 psi | 67% | 2264 fps | 100% |
| Norma 203B | <<locked>> | 80% | 37,536 psi | 60% | 2229 fps | 98.1% |
| Norma URP | <<locked>> | 86% | 33,214 psi | 53% | 2184 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 37,043 psi | 59% | 2242 fps | 97.8% |
| Ramshot Hunter | <<locked>> | 92% | 39,247 psi | 63% | 2310 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 44,251 psi | 71% | 2308 fps | 97.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 43,758 psi | 70% | 2328 fps | 99.2% |
| Ramshot X-Terminator | <<locked>> | 80% | 47,964 psi | 77% | 2346 fps | 99.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,527 psi | 43% | 1343 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 49,850 psi | 80% | 2373 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 41,568 psi | 67% | 2272 fps | 95.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 39,856 psi | 64% | 2329 fps | 98.2% |
| ReloadSwiss RS 60 | 61.5 gr | 80% | 32,590 psi | 52% | 2213 fps | 99.2% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 34,679 psi | 56% | 2244 fps | 95.6% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 37,536 psi | 60% | 2301 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 80% | 45,571 psi | 73% | 2290 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 39,610 psi | 64% | 2213 fps | 99.3% |
| Rottweil R 903 | <<locked>> | 80% | 32,967 psi | 53% | 2140 fps | 97.6% |
| Rottweil R 907 | <<locked>> | 92% | 46,499 psi | 75% | 2345 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 86% | 37,318 psi | 60% | 2194 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 41,249 psi | 66% | 2279 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 37,855 psi | 61% | 2202 fps | 99.1% |
| Shooters World SW4350 | <<locked>> | 92% | 42,366 psi | 68% | 2306 fps | 95.5% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 52,721 psi | 85% | 2391 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 33,997 psi | 55% | 2185 fps | 97% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 52,895 psi | 85% | 2365 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 42,438 psi | 68% | 2284 fps | 97.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 40,988 psi | 66% | 2272 fps | 98.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,192 psi | 69% | 2216 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,795 psi | 57% | 2103 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 41,495 psi | 67% | 2234 fps | 95% |
| Somchem S321 | <<locked>> | 80% | 47,848 psi | 77% | 2372 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 42,699 psi | 68% | 2219 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 42,192 psi | 68% | 2284 fps | 98.9% |
| Somchem S355 | <<locked>> | 80% | 33,997 psi | 55% | 2148 fps | 97.6% |
| Somchem S365 | <<locked>> | 82% | 26,179 psi | 42% | 2045 fps | 95.8% |
| Unknown powder | <<locked>> | 86% | 36,085 psi | 58% | 2231 fps | 95.6% |
| Vihtavuori N130 | <<locked>> | 80% | 47,790 psi | 77% | 2254 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 40,698 psi | 65% | 2171 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 39,015 psi | 63% | 2201 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,059 psi | 63% | 2201 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 28,921 psi | 46% | 2022 fps | 97.4% |
| Vihtavuori N160 | <<locked>> | 84% | 33,982 psi | 54% | 2166 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 46,862 psi | 75% | 2349 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 38,711 psi | 62% | 2219 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 34,214 psi | 55% | 2202 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 92% | 30,269 psi | 49% | 2171 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 28,645 psi | 46% | 2026 fps | 95.4% |
| Winchester 748 | <<locked>> | 80% | 47,326 psi | 76% | 2392 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 41,075 psi | 66% | 2337 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 96% | 28,543 psi | 46% | 2167 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 49,995 psi | 80% | 2427 fps | 99.9% |
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 104 powders for .375 H&H Mag. loaded with the .375 | 300gr | Woodleigh FMJ. Alliant Reloder-17 delivers the highest muzzle velocity at 2,606 fps; across all powders the maximum-charge window runs from 1,471 fps to 2,606 fps. Accurate 4350 gives the best case fill at 100 %, and 104 of the 104 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 52–90 %, leaving at least 10 % headroom. The 300.0 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, Alliant Reloder-17, ReloadSwiss RS 60 rank at the top here: for .375 H&H Mag. with the .375 | 300gr | Woodleigh FMJ 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.