Load Specifications
Bullet Manufacturer:North Fork
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 | NorthFork Bonded Core 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 Reloder-17, ReloadSwiss RS 60 and Alliant Power Pro 2000-MR.
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% | 54,607 psi | 86% | 2405 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 56,478 psi | 89% | 2474 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 56,579 psi | 89% | 2470 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 54,824 psi | 86% | 2490 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 55,666 psi | 87% | 2477 fps | 97.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 39,711 psi | 62% | 2339 fps | 96.2% |
| Accurate 4064 | <<locked>> | 92% | 56,391 psi | 88% | 2513 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 55,825 psi | 87% | 2595 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 88% | 56,898 psi | 89% | 2543 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 54,375 psi | 85% | 2500 fps | 99.9% |
| ADI Benchmark 8208 | <<locked>> | 86% | 56,043 psi | 88% | 2500 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 56,956 psi | 89% | 2470 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 56,478 psi | 89% | 2657 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 54,476 psi | 85% | 2520 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 57,609 psi | 90% | 2444 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 55,027 psi | 86% | 2539 fps | 100% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 53,693 psi | 84% | 2598 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 96% | 54,882 psi | 86% | 2631 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,435 psi | 60% | 2369 fps | 99.1% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 42,627 psi | 67% | 2510 fps | 98.3% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 56,666 psi | 89% | 2562 fps | 99.9% |
| Bofors RP3 | <<locked>> | 92% | 54,882 psi | 86% | 2536 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 55,143 psi | 86% | 2510 fps | 97.8% |
| Hodgdon Benchmark | <<locked>> | 84% | 54,331 psi | 85% | 2438 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 55,187 psi | 86% | 2526 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 57,392 psi | 90% | 2621 fps | 100% |
| Hodgdon H322 | <<locked>> | 82% | 56,753 psi | 89% | 2487 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 57,696 psi | 90% | 2513 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 55,985 psi | 88% | 2549 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 98% | 55,245 psi | 87% | 2595 fps | 98.5% |
| Hodgdon H4350 | <<locked>> | 96% | 56,014 psi | 88% | 2559 fps | 97.4% |
| Hodgdon H4895 | <<locked>> | 88% | 57,450 psi | 90% | 2552 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 49,908 psi | 78% | 2487 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 56,855 psi | 89% | 2585 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 56,101 psi | 88% | 2635 fps | 98.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,592 psi | 56% | 1503 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 55,259 psi | 87% | 2510 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 57,522 psi | 90% | 2530 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 57,334 psi | 90% | 2526 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 90% | 57,595 psi | 90% | 2516 fps | 98.6% |
| IMR 4198 | <<locked>> | 82% | 57,464 psi | 90% | 2402 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 55,085 psi | 86% | 2533 fps | 97.9% |
| IMR 4451 Enduron | <<locked>> | 96% | 56,898 psi | 89% | 2536 fps | 98.5% |
| IMR 4831ᴾ | <<locked>> | 100% | 52,750 psi | 83% | 2539 fps | 99.7% |
| IMR 4895 | <<locked>> | 90% | 56,434 psi | 88% | 2566 fps | 100% |
| IMR 8208 XBR | <<locked>> | 86% | 56,043 psi | 88% | 2500 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 56,246 psi | 88% | 2487 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 56,695 psi | 89% | 2523 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 56,579 psi | 89% | 2477 fps | 100% |
| Lovex S062 | <<locked>> | 92% | 57,203 psi | 90% | 2523 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 56,115 psi | 88% | 2530 fps | 99.3% |
| Lovex S070ᴾ | <<locked>> | 100% | 57,087 psi | 89% | 2562 fps | 98.8% |
| Norma 201 | <<locked>> | 88% | 55,608 psi | 87% | 2493 fps | 100% |
| Norma 202 | <<locked>> | 88% | 56,188 psi | 88% | 2493 fps | 100% |
| Norma 203B | <<locked>> | 92% | 57,566 psi | 90% | 2572 fps | 100% |
| Norma 204ᴾ | <<locked>> | 100% | 55,840 psi | 88% | 2579 fps | 96.8% |
| Norma URPᴾ | <<locked>> | 100% | 54,882 psi | 86% | 2582 fps | 99.8% |
| Ramshot Big Game | <<locked>> | 90% | 54,520 psi | 85% | 2552 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 53,708 psi | 84% | 2585 fps | 98.9% |
| Ramshot TAC | <<locked>> | 86% | 56,260 psi | 88% | 2523 fps | 99.4% |
| Ramshot Wild Boar | <<locked>> | 86% | 55,695 psi | 87% | 2536 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 84% | 56,869 psi | 89% | 2503 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,071 psi | 57% | 1539 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 55,405 psi | 87% | 2477 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 56,260 psi | 88% | 2533 fps | 98.9% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 55,564 psi | 87% | 2602 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 54,766 psi | 86% | 2631 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 55,521 psi | 87% | 2618 fps | 99.8% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 55,288 psi | 87% | 2644 fps | 99.7% |
| Rottweil R 901 | <<locked>> | 86% | 56,681 psi | 89% | 2474 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 56,217 psi | 88% | 2493 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 54,752 psi | 86% | 2526 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 55,143 psi | 86% | 2510 fps | 97.8% |
| Shooters World Long Rifle | <<locked>> | 98% | 56,115 psi | 88% | 2530 fps | 99.3% |
| Shooters World Match Rifle | <<locked>> | 88% | 56,695 psi | 89% | 2523 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 57,203 psi | 90% | 2523 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 57,087 psi | 89% | 2562 fps | 98.8% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 56,521 psi | 89% | 2582 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 54,563 psi | 86% | 2500 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 55,390 psi | 87% | 2523 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 57,319 psi | 90% | 2434 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 57,319 psi | 90% | 2431 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 56,797 psi | 89% | 2493 fps | 98.5% |
| Somchem S321 | <<locked>> | 84% | 57,290 psi | 90% | 2530 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 56,463 psi | 88% | 2434 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 54,273 psi | 85% | 2493 fps | 100% |
| Somchem S355 | <<locked>> | 94% | 55,100 psi | 86% | 2523 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 49,255 psi | 77% | 2539 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 45,905 psi | 72% | 2434 fps | 96% |
| Vihtavuori N130 | <<locked>> | 84% | 57,145 psi | 90% | 2398 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 57,493 psi | 90% | 2418 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 55,912 psi | 88% | 2457 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 56,681 psi | 89% | 2474 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 56,492 psi | 89% | 2503 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 57,522 psi | 90% | 2579 fps | 99.9% |
| Vihtavuori N530 | <<locked>> | 86% | 56,565 psi | 89% | 2500 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 54,752 psi | 86% | 2474 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 56,420 psi | 88% | 2585 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 41,727 psi | 65% | 2434 fps | 98.9% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 54,302 psi | 85% | 2516 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 56,420 psi | 88% | 2543 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 55,492 psi | 87% | 2598 fps | 98.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,287 psi | 54% | 2372 fps | 99% |
| Winchester StaBALL Match | <<locked>> | 88% | 55,056 psi | 86% | 2530 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% | 48,269 psi | 76% | 2326 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 52,721 psi | 83% | 2428 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 41,046 psi | 64% | 2267 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 47,863 psi | 75% | 2398 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 45,977 psi | 72% | 2336 fps | 95.7% |
| Accurate 3100 | <<locked>> | 98% | 37,202 psi | 58% | 2293 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 38,812 psi | 61% | 2264 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 32,343 psi | 51% | 2201 fps | 95.7% |
| ADI AR 2206H | <<locked>> | 80% | 44,411 psi | 70% | 2362 fps | 99.5% |
| ADI AR 2208 | <<locked>> | 80% | 37,855 psi | 59% | 2231 fps | 97.9% |
| ADI Benchmark 8208 | <<locked>> | 80% | 46,470 psi | 73% | 2365 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 46,833 psi | 73% | 2349 fps | 100% |
| Alliant Power Pro 2000-MR | 66.2 gr | 80% | 40,350 psi | 63% | 2395 fps | 98.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,405 psi | 59% | 2251 fps | 99.1% |
| Alliant Reloder-10x | <<locked>> | 80% | 54,172 psi | 85% | 2402 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,132 psi | 63% | 2306 fps | 98.6% |
| Alliant Reloder-16 | <<locked>> | 84% | 32,924 psi | 52% | 2215 fps | 95.9% |
| Alliant Reloder-17 | 65.2 gr | 80% | 32,285 psi | 51% | 2228 fps | 97.5% |
| Alliant Reloder-23 | <<locked>> | 90% | 28,398 psi | 45% | 2133 fps | 95.5% |
| Alliant Reloder-26 | <<locked>> | 94% | 34,693 psi | 54% | 2343 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 43,453 psi | 68% | 2369 fps | 98.7% |
| Bofors RP3 | <<locked>> | 80% | 37,014 psi | 58% | 2257 fps | 99.1% |
| Bofors RP7 | <<locked>> | 88% | 43,134 psi | 68% | 2323 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 48,312 psi | 76% | 2356 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 45,281 psi | 71% | 2388 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 49,922 psi | 78% | 2516 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 80% | 53,098 psi | 83% | 2444 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 54,143 psi | 85% | 2470 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 37,913 psi | 59% | 2260 fps | 96.9% |
| Hodgdon H414 | <<locked>> | 88% | 39,813 psi | 62% | 2346 fps | 95.1% |
| Hodgdon H4350 | <<locked>> | 90% | 46,383 psi | 73% | 2415 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 44,788 psi | 70% | 2372 fps | 99.8% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 28,384 psi | 44% | 2080 fps | 95.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 40,785 psi | 64% | 2349 fps | 99.6% |
| Hodgdon Superformance | <<locked>> | 90% | 42,279 psi | 66% | 2411 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,426 psi | 41% | 1339 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 43,018 psi | 67% | 2329 fps | 99.6% |
| IMR 3031 | <<locked>> | 80% | 44,483 psi | 70% | 2362 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,697 psi | 62% | 2260 fps | 98.5% |
| IMR 4166 Enduron | <<locked>> | 80% | 42,134 psi | 66% | 2277 fps | 95.6% |
| IMR 4198 | <<locked>> | 80% | 54,215 psi | 85% | 2362 fps | 100% |
| IMR 4350 | <<locked>> | 92% | 42,960 psi | 67% | 2346 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 86% | 42,163 psi | 66% | 2306 fps | 95.5% |
| IMR 4831 | <<locked>> | 84% | 31,531 psi | 49% | 2169 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 41,089 psi | 64% | 2333 fps | 99.1% |
| IMR 8208 XBR | <<locked>> | 80% | 46,470 psi | 73% | 2365 fps | 100% |
| Lovex D073.5 | <<locked>> | 80% | 52,518 psi | 82% | 2438 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 43,540 psi | 68% | 2343 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 44,454 psi | 70% | 2303 fps | 99.5% |
| Lovex S062 | <<locked>> | 80% | 39,581 psi | 62% | 2264 fps | 99.6% |
| Lovex S065 | <<locked>> | 84% | 36,782 psi | 58% | 2215 fps | 95.6% |
| Lovex S070 | <<locked>> | 88% | 39,494 psi | 62% | 2287 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 43,627 psi | 68% | 2320 fps | 99.9% |
| Norma 202 | <<locked>> | 80% | 43,845 psi | 69% | 2323 fps | 100% |
| Norma 203B | <<locked>> | 80% | 39,523 psi | 62% | 2297 fps | 98.9% |
| Norma 204 | <<locked>> | 96% | 48,907 psi | 77% | 2477 fps | 95.3% |
| Norma URP | <<locked>> | 84% | 32,837 psi | 51% | 2205 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 39,044 psi | 61% | 2313 fps | 98.6% |
| Ramshot Hunter | <<locked>> | 90% | 39,001 psi | 61% | 2339 fps | 95.8% |
| Ramshot TAC | <<locked>> | 80% | 46,325 psi | 73% | 2379 fps | 98.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 45,890 psi | 72% | 2395 fps | 99.6% |
| Ramshot X-Terminator | <<locked>> | 80% | 50,053 psi | 78% | 2411 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,760 psi | 42% | 1371 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 52,011 psi | 82% | 2434 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 38,232 psi | 60% | 2244 fps | 95.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 42,076 psi | 66% | 2398 fps | 98.9% |
| ReloadSwiss RS 60 | 65.2 gr | 80% | 34,374 psi | 54% | 2287 fps | 99.7% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 32,111 psi | 50% | 2218 fps | 95.1% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 34,592 psi | 54% | 2270 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 47,543 psi | 75% | 2349 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 41,524 psi | 65% | 2277 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 80% | 34,795 psi | 55% | 2205 fps | 98.4% |
| Rottweil R 907 | <<locked>> | 88% | 43,134 psi | 68% | 2323 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 84% | 36,782 psi | 58% | 2215 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 43,540 psi | 68% | 2343 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 39,581 psi | 62% | 2264 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 88% | 39,494 psi | 62% | 2287 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,694 psi | 56% | 2251 fps | 97.9% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 44,570 psi | 70% | 2352 fps | 98.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 42,801 psi | 67% | 2333 fps | 99.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 44,875 psi | 70% | 2270 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,318 psi | 58% | 2159 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 41,031 psi | 64% | 2257 fps | 95.4% |
| Somchem S321 | <<locked>> | 80% | 50,111 psi | 79% | 2438 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 44,585 psi | 70% | 2277 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 44,237 psi | 69% | 2349 fps | 99.4% |
| Somchem S355 | <<locked>> | 80% | 35,781 psi | 56% | 2215 fps | 98.4% |
| Somchem S365 | <<locked>> | 80% | 25,962 psi | 41% | 2067 fps | 96.3% |
| Somchem S385 | <<locked>> | 98% | 42,960 psi | 67% | 2385 fps | 95.2% |
| Vihtavuori N130 | <<locked>> | 80% | 50,618 psi | 79% | 2320 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 45,194 psi | 71% | 2264 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 40,915 psi | 64% | 2257 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 41,452 psi | 65% | 2267 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 33,866 psi | 53% | 2156 fps | 99% |
| Vihtavuori N160 | <<locked>> | 82% | 32,213 psi | 50% | 2159 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 46,615 psi | 73% | 2365 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 39,972 psi | 63% | 2260 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 33,678 psi | 53% | 2208 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 90% | 30,284 psi | 47% | 2198 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,008 psi | 47% | 2093 fps | 96.7% |
| Winchester 748 | <<locked>> | 80% | 46,151 psi | 72% | 2405 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 39,972 psi | 63% | 2349 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 94% | 28,384 psi | 44% | 2201 fps | 95.9% |
| Winchester StaBALL Match | <<locked>> | 80% | 42,322 psi | 66% | 2339 fps | 99.6% |
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 Weath. Mag. loaded with the .375 | 300gr | NorthFork Bonded Core. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,657 fps; across all powders the maximum-charge window runs from 1,503 fps to 2,657 fps. Accurate 3100 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 (440 MPa), the top charges use 54–90 %, 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, Accurate 4350, 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 Reloder-17, ReloadSwiss RS 60, Alliant Power Pro 2000-MR rank at the top here: for .375 Weath. Mag. with the .375 | 300gr | NorthFork Bonded Core 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.