Load Specifications
Bullet:.375 | 300gr | Woodleigh FMJ
Bullet Manufacturer:Woodleigh
Bullet Weight:300 gr
Bullet Diameter:0.375"
Bullet Length:<<locked>>
Caliber:.375 Weath. Mag. load data
Case Length (l3):2.85"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:105 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:24"
Max. allowed Pressure:63,817 psi
Recommended Twist Rate:1:6.0
Load data in caliber .375 Weath. Mag. with .375 | 300gr | Woodleigh FMJ bullet and 103 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, Hodgdon Superformance and Alliant Reloder-17.
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>> | 84% | 56,971 psi | 89% | 2451 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 55,651 psi | 87% | 2474 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 57,522 psi | 90% | 2539 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 54,549 psi | 85% | 2487 fps | 97.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 42,525 psi | 67% | 2402 fps | 97.3% |
| Accurate 4064 | <<locked>> | 90% | 55,651 psi | 87% | 2520 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 55,579 psi | 87% | 2608 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 86% | 55,956 psi | 88% | 2552 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 56,942 psi | 89% | 2552 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 50,198 psi | 79% | 2536 fps | 96.1% |
| ADI Benchmark 8208 | <<locked>> | 84% | 54,810 psi | 86% | 2503 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 55,985 psi | 88% | 2474 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 55,651 psi | 87% | 2667 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 49,980 psi | 78% | 2536 fps | 96.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 56,898 psi | 89% | 2569 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 57,508 psi | 90% | 2592 fps | 100% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 56,579 psi | 89% | 2657 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 94% | 54,056 psi | 85% | 2638 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 49,269 psi | 77% | 2530 fps | 96.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 40,509 psi | 63% | 2428 fps | 99.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 45,266 psi | 71% | 2582 fps | 99.1% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 55,622 psi | 87% | 2569 fps | 100% |
| Bofors RP3 | <<locked>> | 90% | 54,085 psi | 85% | 2539 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 57,653 psi | 90% | 2566 fps | 98.5% |
| Hodgdon Benchmark | <<locked>> | 84% | 56,507 psi | 89% | 2484 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 54,215 psi | 85% | 2533 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 56,246 psi | 88% | 2625 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 54,926 psi | 86% | 2556 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 96% | 54,665 psi | 86% | 2608 fps | 98.7% |
| Hodgdon H4350 | <<locked>> | 94% | 55,230 psi | 87% | 2569 fps | 97.6% |
| Hodgdon H4895 | <<locked>> | 86% | 56,579 psi | 89% | 2559 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 52,736 psi | 83% | 2539 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 55,999 psi | 88% | 2592 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 54,940 psi | 86% | 2641 fps | 98.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,810 psi | 56% | 1526 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 54,114 psi | 85% | 2513 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 56,666 psi | 89% | 2536 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 56,463 psi | 88% | 2536 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 88% | 56,289 psi | 88% | 2523 fps | 98.7% |
| IMR 4350 | <<locked>> | 98% | 54,360 psi | 85% | 2543 fps | 98.1% |
| IMR 4451 Enduron | <<locked>> | 94% | 56,072 psi | 88% | 2549 fps | 98.6% |
| IMR 4831ᴾ | <<locked>> | 100% | 55,970 psi | 88% | 2598 fps | 100% |
| IMR 4895 | <<locked>> | 88% | 55,506 psi | 87% | 2572 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 54,810 psi | 86% | 2503 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 55,811 psi | 87% | 2526 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 55,405 psi | 87% | 2484 fps | 100% |
| Lovex S062 | <<locked>> | 90% | 56,173 psi | 88% | 2530 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 55,390 psi | 87% | 2539 fps | 99.4% |
| Lovex S070 | <<locked>> | 98% | 56,405 psi | 88% | 2575 fps | 98.9% |
| Norma 201 | <<locked>> | 86% | 54,810 psi | 86% | 2500 fps | 100% |
| Norma 202 | <<locked>> | 86% | 55,172 psi | 86% | 2497 fps | 100% |
| Norma 203B | <<locked>> | 90% | 56,724 psi | 89% | 2579 fps | 100% |
| Norma 204 | <<locked>> | 98% | 55,027 psi | 86% | 2592 fps | 97% |
| Norma MRPᴾ | <<locked>> | 100% | 45,194 psi | 71% | 2539 fps | 96.8% |
| Norma URP | <<locked>> | 98% | 54,433 psi | 85% | 2595 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 90% | 57,406 psi | 90% | 2605 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 56,565 psi | 89% | 2641 fps | 99.4% |
| Ramshot TAC | <<locked>> | 84% | 54,984 psi | 86% | 2526 fps | 99.5% |
| Ramshot Wild Boar | <<locked>> | 84% | 54,665 psi | 86% | 2539 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 55,550 psi | 87% | 2507 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,289 psi | 57% | 1562 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 55,245 psi | 87% | 2543 fps | 99% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 54,694 psi | 86% | 2608 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 57,638 psi | 90% | 2684 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 55,114 psi | 86% | 2631 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 54,578 psi | 86% | 2657 fps | 99.8% |
| Rottweil R 901 | <<locked>> | 84% | 55,680 psi | 87% | 2477 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 55,158 psi | 86% | 2497 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 57,711 psi | 90% | 2582 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 47,993 psi | 75% | 2513 fps | 96% |
| Rottweil R 907 | <<locked>> | 96% | 57,653 psi | 90% | 2566 fps | 98.5% |
| Shooters World Long Rifle | <<locked>> | 96% | 55,390 psi | 87% | 2539 fps | 99.4% |
| Shooters World Match Rifle | <<locked>> | 86% | 55,811 psi | 87% | 2526 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 56,173 psi | 88% | 2530 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 56,405 psi | 88% | 2575 fps | 98.9% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 55,651 psi | 87% | 2592 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 57,276 psi | 90% | 2559 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 57,740 psi | 90% | 2572 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 56,231 psi | 88% | 2441 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 56,347 psi | 88% | 2441 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 55,651 psi | 87% | 2500 fps | 98.6% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 47,543 psi | 75% | 2507 fps | 95.9% |
| Somchem S321 | <<locked>> | 82% | 56,086 psi | 88% | 2533 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 55,608 psi | 87% | 2441 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 56,768 psi | 89% | 2546 fps | 100% |
| Somchem S355 | <<locked>> | 94% | 57,696 psi | 90% | 2575 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 52,301 psi | 82% | 2595 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 48,689 psi | 76% | 2497 fps | 97% |
| Vihtavuori N130 | <<locked>> | 82% | 55,898 psi | 88% | 2402 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 56,507 psi | 89% | 2425 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 55,056 psi | 86% | 2461 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 55,695 psi | 87% | 2480 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 55,796 psi | 87% | 2513 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 57,072 psi | 89% | 2592 fps | 99.9% |
| Vihtavuori N530 | <<locked>> | 84% | 55,347 psi | 87% | 2503 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 57,261 psi | 90% | 2523 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 55,883 psi | 88% | 2598 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 44,686 psi | 70% | 2497 fps | 99.5% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 57,043 psi | 89% | 2569 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 55,288 psi | 87% | 2546 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 54,665 psi | 86% | 2608 fps | 98.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 36,201 psi | 57% | 2444 fps | 99.7% |
| Winchester StaBALL Match | <<locked>> | 86% | 54,172 psi | 85% | 2533 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% | 50,444 psi | 79% | 2369 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 43,178 psi | 68% | 2313 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 50,125 psi | 79% | 2444 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 42,105 psi | 66% | 2290 fps | 95.1% |
| Accurate 3100 | <<locked>> | 96% | 37,072 psi | 58% | 2303 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 40,843 psi | 64% | 2313 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 30,008 psi | 47% | 2162 fps | 95.1% |
| ADI AR 2206H | <<locked>> | 80% | 46,441 psi | 73% | 2411 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 80% | 39,508 psi | 62% | 2280 fps | 98.5% |
| ADI AR 2209 | <<locked>> | 98% | 47,181 psi | 74% | 2487 fps | 95.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 48,472 psi | 76% | 2415 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 49,269 psi | 77% | 2395 fps | 100% |
| Alliant Power Pro 2000-MR | 69.4 gr | 80% | 42,250 psi | 66% | 2451 fps | 99.1% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 46,978 psi | 74% | 2487 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 39,233 psi | 61% | 2303 fps | 99.5% |
| Alliant Reloder-15 | <<locked>> | 80% | 42,134 psi | 66% | 2359 fps | 99.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 30,545 psi | 48% | 2172 fps | 95.2% |
| Alliant Reloder-17 | 68.4 gr | 80% | 33,895 psi | 53% | 2283 fps | 98.3% |
| Alliant Reloder-19 | <<locked>> | 98% | 46,325 psi | 73% | 2480 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 88% | 28,094 psi | 44% | 2142 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 92% | 34,330 psi | 54% | 2352 fps | 96.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 45,542 psi | 71% | 2418 fps | 99.2% |
| Bofors RP3 | <<locked>> | 80% | 38,986 psi | 61% | 2306 fps | 99.5% |
| Bofors RP7 | <<locked>> | 86% | 42,380 psi | 66% | 2329 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 50,140 psi | 79% | 2398 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 47,398 psi | 74% | 2438 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 52,620 psi | 82% | 2575 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 39,740 psi | 62% | 2313 fps | 97.7% |
| Hodgdon H414 | <<locked>> | 86% | 39,305 psi | 62% | 2356 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 88% | 45,759 psi | 72% | 2425 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 46,891 psi | 73% | 2421 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 28,050 psi | 44% | 2087 fps | 96.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 42,917 psi | 67% | 2402 fps | 99.9% |
| Hodgdon Superformance | 79.5 gr | 88% | 41,510 psi | 65% | 2421 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,701 psi | 42% | 1362 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 44,962 psi | 70% | 2379 fps | 99.8% |
| IMR 3031 | <<locked>> | 80% | 46,804 psi | 73% | 2408 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 41,510 psi | 65% | 2310 fps | 99.1% |
| IMR 4166 Enduron | <<locked>> | 80% | 43,845 psi | 69% | 2329 fps | 96.5% |
| IMR 4350 | <<locked>> | 90% | 42,438 psi | 67% | 2356 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 84% | 41,321 psi | 65% | 2313 fps | 95.7% |
| IMR 4831 | <<locked>> | 82% | 31,256 psi | 49% | 2175 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 43,149 psi | 68% | 2385 fps | 99.6% |
| IMR 8208 XBR | <<locked>> | 80% | 48,472 psi | 76% | 2415 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 45,818 psi | 72% | 2392 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 46,224 psi | 72% | 2352 fps | 99.8% |
| Lovex S062 | <<locked>> | 80% | 41,452 psi | 65% | 2313 fps | 99.9% |
| Lovex S065 | <<locked>> | 80% | 34,142 psi | 54% | 2175 fps | 95% |
| Lovex S070 | <<locked>> | 86% | 38,928 psi | 61% | 2293 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 45,527 psi | 71% | 2369 fps | 100% |
| Norma 202 | <<locked>> | 80% | 45,788 psi | 72% | 2369 fps | 100% |
| Norma 203B | <<locked>> | 80% | 41,481 psi | 65% | 2349 fps | 99.3% |
| Norma 204 | <<locked>> | 94% | 48,080 psi | 75% | 2487 fps | 95.5% |
| Norma MRP | <<locked>> | 96% | 39,552 psi | 62% | 2431 fps | 95% |
| Norma URP | <<locked>> | 80% | 30,472 psi | 48% | 2162 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 40,959 psi | 64% | 2362 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 86% | 36,100 psi | 57% | 2297 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 48,356 psi | 76% | 2428 fps | 98.7% |
| Ramshot Wild Boar | <<locked>> | 80% | 47,863 psi | 75% | 2441 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 80% | 52,199 psi | 82% | 2461 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,050 psi | 42% | 1394 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 40,045 psi | 63% | 2297 fps | 96.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 44,527 psi | 70% | 2454 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 36,071 psi | 57% | 2343 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 31,807 psi | 50% | 2224 fps | 95.4% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 34,055 psi | 53% | 2280 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 49,501 psi | 78% | 2395 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 43,279 psi | 68% | 2323 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 36,753 psi | 58% | 2260 fps | 99% |
| Rottweil R 905 | <<locked>> | 98% | 44,788 psi | 70% | 2461 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 86% | 42,380 psi | 66% | 2329 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 34,142 psi | 54% | 2175 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 45,818 psi | 72% | 2392 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 41,452 psi | 65% | 2313 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 86% | 38,928 psi | 61% | 2293 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 37,565 psi | 59% | 2303 fps | 98.6% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 46,659 psi | 73% | 2405 fps | 98.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 44,846 psi | 70% | 2385 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 46,659 psi | 73% | 2316 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 38,957 psi | 61% | 2201 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 40,306 psi | 63% | 2264 fps | 95.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 44,382 psi | 70% | 2454 fps | 95% |
| Somchem S321 | <<locked>> | 80% | 52,373 psi | 82% | 2487 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 46,412 psi | 73% | 2320 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 46,354 psi | 73% | 2402 fps | 99.7% |
| Somchem S355 | <<locked>> | 80% | 37,521 psi | 59% | 2264 fps | 99% |
| Somchem S365 | <<locked>> | 80% | 27,253 psi | 43% | 2123 fps | 97.3% |
| Somchem S385 | <<locked>> | 96% | 42,728 psi | 67% | 2398 fps | 95.6% |
| Vihtavuori N130 | <<locked>> | 80% | 52,562 psi | 82% | 2359 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 47,050 psi | 74% | 2306 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 42,917 psi | 67% | 2300 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 43,439 psi | 68% | 2313 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 35,679 psi | 56% | 2205 fps | 99.5% |
| Vihtavuori N160 | <<locked>> | 80% | 31,763 psi | 50% | 2165 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 48,660 psi | 76% | 2411 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 41,800 psi | 66% | 2306 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 31,241 psi | 49% | 2165 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 86% | 28,369 psi | 44% | 2162 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,415 psi | 49% | 2142 fps | 97.6% |
| Winchester 748 | <<locked>> | 80% | 48,414 psi | 76% | 2454 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 39,465 psi | 62% | 2359 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 90% | 26,382 psi | 41% | 2159 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 44,367 psi | 70% | 2392 fps | 99.8% |
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 103 powders for .375 Weath. Mag. loaded with the .375 | 300gr | Woodleigh FMJ. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,684 fps; across all powders the maximum-charge window runs from 1,526 fps to 2,684 fps. Accurate 3100 gives the best case fill at 100 %, and 103 of the 103 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 56–90 %, 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 3100, ADI AR 2209, Alliant Power Pro Varmint 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, Hodgdon Superformance, Alliant Reloder-17 rank at the top here: for .375 Weath. 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.