Load Specifications
Bullet Manufacturer:Nosler
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 | Nosler Partition bullet and 101 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% | 55,709 psi | 87% | 2425 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 57,464 psi | 90% | 2493 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 54,186 psi | 85% | 2451 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 55,956 psi | 88% | 2510 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 56,797 psi | 89% | 2503 fps | 98% |
| Accurate 3100ᴾ | <<locked>> | 100% | 41,060 psi | 64% | 2369 fps | 96.7% |
| Accurate 4064 | <<locked>> | 92% | 57,609 psi | 90% | 2536 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 57,609 psi | 90% | 2625 fps | 100% |
| ADI AR 2206H | <<locked>> | 86% | 54,723 psi | 86% | 2523 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 55,608 psi | 87% | 2523 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 86% | 57,174 psi | 90% | 2523 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 54,592 psi | 86% | 2451 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 54,099 psi | 85% | 2635 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 55,506 psi | 87% | 2543 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 56,086 psi | 88% | 2562 fps | 100% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 54,969 psi | 86% | 2625 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 96% | 56,231 psi | 88% | 2657 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 39,262 psi | 62% | 2395 fps | 99.3% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 43,758 psi | 69% | 2543 fps | 98.7% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 54,172 psi | 85% | 2539 fps | 99.9% |
| Bofors RP3 | <<locked>> | 92% | 56,188 psi | 88% | 2559 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 56,246 psi | 88% | 2536 fps | 98.1% |
| Hodgdon Benchmark | <<locked>> | 84% | 55,477 psi | 87% | 2461 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 56,449 psi | 88% | 2552 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 54,897 psi | 86% | 2598 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 57,159 psi | 90% | 2572 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 98% | 56,550 psi | 89% | 2625 fps | 98.8% |
| Hodgdon H4350 | <<locked>> | 96% | 57,261 psi | 90% | 2585 fps | 97.7% |
| Hodgdon H4895 | <<locked>> | 86% | 55,245 psi | 87% | 2533 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 51,256 psi | 80% | 2513 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 54,563 psi | 86% | 2566 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 57,290 psi | 90% | 2661 fps | 98.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,563 psi | 56% | 1512 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 56,318 psi | 88% | 2533 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 55,347 psi | 87% | 2513 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 55,027 psi | 86% | 2507 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 88% | 55,013 psi | 86% | 2493 fps | 98.4% |
| IMR 4350ᴾ | <<locked>> | 100% | 56,275 psi | 88% | 2559 fps | 98.2% |
| IMR 4451 Enduron | <<locked>> | 94% | 54,679 psi | 86% | 2516 fps | 98.3% |
| IMR 4831ᴾ | <<locked>> | 100% | 54,085 psi | 85% | 2566 fps | 99.9% |
| IMR 4895 | <<locked>> | 90% | 57,522 psi | 90% | 2589 fps | 100% |
| IMR 8208 XBR | <<locked>> | 86% | 57,174 psi | 90% | 2523 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 57,377 psi | 90% | 2507 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 54,259 psi | 85% | 2500 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 57,450 psi | 90% | 2500 fps | 100% |
| Lovex S062 | <<locked>> | 90% | 54,955 psi | 86% | 2503 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 57,450 psi | 90% | 2556 fps | 99.5% |
| Lovex S070 | <<locked>> | 98% | 54,810 psi | 86% | 2543 fps | 98.6% |
| Norma 201 | <<locked>> | 88% | 56,739 psi | 89% | 2516 fps | 100% |
| Norma 202 | <<locked>> | 88% | 57,363 psi | 90% | 2513 fps | 100% |
| Norma 203B | <<locked>> | 90% | 55,317 psi | 87% | 2552 fps | 100% |
| Norma 204ᴾ | <<locked>> | 100% | 57,203 psi | 90% | 2608 fps | 97.2% |
| Norma MRPᴾ | <<locked>> | 100% | 43,830 psi | 69% | 2503 fps | 96.2% |
| Norma URPᴾ | <<locked>> | 100% | 56,304 psi | 88% | 2608 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 90% | 55,927 psi | 88% | 2579 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 55,114 psi | 86% | 2612 fps | 99.2% |
| Ramshot TAC | <<locked>> | 86% | 57,363 psi | 90% | 2546 fps | 99.6% |
| Ramshot Wild Boar | <<locked>> | 86% | 56,927 psi | 89% | 2559 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 54,418 psi | 85% | 2480 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,201 psi | 57% | 1549 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 56,608 psi | 89% | 2503 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 57,580 psi | 90% | 2559 fps | 99.1% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 56,739 psi | 89% | 2625 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 56,130 psi | 88% | 2657 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 57,159 psi | 90% | 2648 fps | 99.9% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 56,536 psi | 89% | 2674 fps | 99.8% |
| Rottweil R 901 | <<locked>> | 86% | 57,725 psi | 90% | 2493 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 57,348 psi | 90% | 2516 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 56,057 psi | 88% | 2549 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 56,246 psi | 88% | 2536 fps | 98.1% |
| Shooters World Long Rifle | <<locked>> | 98% | 57,450 psi | 90% | 2556 fps | 99.5% |
| Shooters World Match Rifle | <<locked>> | 86% | 54,259 psi | 85% | 2500 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 54,955 psi | 86% | 2503 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 54,810 psi | 86% | 2543 fps | 98.6% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 57,725 psi | 90% | 2608 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 55,767 psi | 87% | 2526 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 56,391 psi | 88% | 2543 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 54,853 psi | 86% | 2415 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 54,926 psi | 86% | 2415 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 54,404 psi | 85% | 2470 fps | 98.3% |
| Somchem S321 | <<locked>> | 82% | 54,650 psi | 86% | 2507 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 57,566 psi | 90% | 2454 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 55,259 psi | 87% | 2516 fps | 100% |
| Somchem S355 | <<locked>> | 94% | 56,362 psi | 88% | 2549 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 50,589 psi | 79% | 2566 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 47,079 psi | 74% | 2461 fps | 96.5% |
| Vihtavuori N130 | <<locked>> | 82% | 54,650 psi | 86% | 2379 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 55,114 psi | 86% | 2398 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 56,971 psi | 89% | 2477 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 54,462 psi | 85% | 2454 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 54,273 psi | 85% | 2484 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 55,376 psi | 87% | 2562 fps | 99.8% |
| Vihtavuori N530 | <<locked>> | 86% | 57,696 psi | 90% | 2520 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 55,941 psi | 88% | 2497 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 54,346 psi | 85% | 2566 fps | 99.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 43,047 psi | 67% | 2464 fps | 99.2% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 55,521 psi | 87% | 2539 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 57,537 psi | 90% | 2566 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 56,768 psi | 89% | 2625 fps | 98.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 35,201 psi | 55% | 2408 fps | 99.4% |
| Winchester StaBALL Match | <<locked>> | 88% | 56,275 psi | 88% | 2552 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% | 49,153 psi | 77% | 2343 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 53,925 psi | 85% | 2451 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 41,887 psi | 66% | 2283 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 48,834 psi | 77% | 2418 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 43,874 psi | 69% | 2310 fps | 95.3% |
| Accurate 3100 | <<locked>> | 96% | 35,795 psi | 56% | 2270 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 39,639 psi | 62% | 2283 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 31,082 psi | 49% | 2182 fps | 95.4% |
| ADI AR 2206H | <<locked>> | 80% | 45,339 psi | 71% | 2385 fps | 99.6% |
| ADI AR 2208 | <<locked>> | 80% | 38,522 psi | 60% | 2254 fps | 98.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 47,427 psi | 74% | 2388 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 47,863 psi | 75% | 2369 fps | 100% |
| Alliant Power Pro 2000-MR | 67.6 gr | 80% | 41,104 psi | 64% | 2418 fps | 98.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 38,319 psi | 60% | 2277 fps | 99.3% |
| Alliant Reloder-15 | <<locked>> | 80% | 41,060 psi | 64% | 2329 fps | 98.8% |
| Alliant Reloder-16 | <<locked>> | 82% | 31,676 psi | 50% | 2192 fps | 95.5% |
| Alliant Reloder-17 | 66.6 gr | 80% | 32,982 psi | 52% | 2254 fps | 97.9% |
| Alliant Reloder-23 | <<locked>> | 88% | 27,325 psi | 43% | 2110 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 92% | 33,243 psi | 52% | 2316 fps | 95.3% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 44,454 psi | 70% | 2392 fps | 99% |
| Bofors RP3 | <<locked>> | 80% | 37,927 psi | 59% | 2280 fps | 99.3% |
| Bofors RP7 | <<locked>> | 88% | 44,034 psi | 69% | 2349 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 80% | 49,023 psi | 77% | 2372 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 46,195 psi | 72% | 2411 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 51,097 psi | 80% | 2543 fps | 99.9% |
| Hodgdon H380 | <<locked>> | 80% | 38,725 psi | 61% | 2283 fps | 97.3% |
| Hodgdon H414 | <<locked>> | 88% | 40,843 psi | 64% | 2375 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 88% | 44,541 psi | 70% | 2392 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 45,759 psi | 72% | 2395 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 27,238 psi | 43% | 2057 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 41,713 psi | 65% | 2372 fps | 99.8% |
| Hodgdon Superformance | 79.2 gr | 90% | 43,265 psi | 68% | 2441 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,571 psi | 42% | 1348 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 43,888 psi | 69% | 2352 fps | 99.7% |
| IMR 3031 | <<locked>> | 80% | 45,672 psi | 72% | 2385 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,451 psi | 63% | 2280 fps | 98.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 42,902 psi | 67% | 2300 fps | 96% |
| IMR 4350 | <<locked>> | 92% | 43,990 psi | 69% | 2372 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 84% | 40,480 psi | 63% | 2287 fps | 95.2% |
| IMR 4831 | <<locked>> | 82% | 30,342 psi | 48% | 2146 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 42,047 psi | 66% | 2359 fps | 99.4% |
| IMR 8208 XBR | <<locked>> | 80% | 47,427 psi | 74% | 2388 fps | 100% |
| Lovex D073.5 | <<locked>> | 80% | 53,650 psi | 84% | 2461 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 44,483 psi | 70% | 2365 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 45,368 psi | 71% | 2326 fps | 99.6% |
| Lovex S062 | <<locked>> | 80% | 40,509 psi | 63% | 2287 fps | 99.7% |
| Lovex S065 | <<locked>> | 82% | 35,418 psi | 56% | 2195 fps | 95.3% |
| Lovex S070 | <<locked>> | 88% | 40,379 psi | 63% | 2310 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 44,382 psi | 70% | 2339 fps | 99.9% |
| Norma 202 | <<locked>> | 80% | 44,817 psi | 70% | 2346 fps | 100% |
| Norma 203B | <<locked>> | 80% | 40,422 psi | 63% | 2323 fps | 99.1% |
| Norma 204 | <<locked>> | 96% | 50,024 psi | 78% | 2507 fps | 95.8% |
| Norma MRP | <<locked>> | 98% | 41,075 psi | 64% | 2451 fps | 95.3% |
| Norma URP | <<locked>> | 82% | 31,618 psi | 50% | 2182 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 39,827 psi | 62% | 2333 fps | 98.9% |
| Ramshot Hunter | <<locked>> | 88% | 37,362 psi | 59% | 2313 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 47,268 psi | 74% | 2402 fps | 98.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 46,717 psi | 73% | 2415 fps | 99.7% |
| Ramshot X-Terminator | <<locked>> | 80% | 51,053 psi | 80% | 2434 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,905 psi | 42% | 1381 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 52,982 psi | 83% | 2454 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 38,986 psi | 61% | 2267 fps | 95.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 43,279 psi | 68% | 2425 fps | 99.2% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 35,070 psi | 55% | 2310 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 33,083 psi | 52% | 2244 fps | 95.7% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 35,418 psi | 56% | 2300 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 80% | 48,443 psi | 76% | 2372 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 42,308 psi | 66% | 2300 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 80% | 35,694 psi | 56% | 2231 fps | 98.7% |
| Rottweil R 907 | <<locked>> | 88% | 44,034 psi | 69% | 2349 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 82% | 35,418 psi | 56% | 2195 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 44,483 psi | 70% | 2365 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 40,509 psi | 63% | 2287 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 88% | 40,379 psi | 63% | 2310 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,622 psi | 57% | 2277 fps | 98.3% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 45,527 psi | 71% | 2379 fps | 98.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 43,830 psi | 69% | 2359 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 45,672 psi | 72% | 2293 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 38,058 psi | 60% | 2178 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 39,305 psi | 62% | 2234 fps | 95% |
| Somchem S321 | <<locked>> | 80% | 51,184 psi | 80% | 2461 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 45,339 psi | 71% | 2297 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 45,237 psi | 71% | 2372 fps | 99.6% |
| Somchem S355 | <<locked>> | 80% | 36,477 psi | 57% | 2234 fps | 98.7% |
| Somchem S365 | <<locked>> | 80% | 26,498 psi | 42% | 2090 fps | 96.7% |
| Somchem S385 | <<locked>> | 98% | 44,092 psi | 69% | 2411 fps | 95.7% |
| Vihtavuori N130 | <<locked>> | 80% | 51,488 psi | 81% | 2339 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 46,035 psi | 72% | 2283 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 41,814 psi | 66% | 2277 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 42,351 psi | 66% | 2287 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 34,679 psi | 54% | 2178 fps | 99.3% |
| Vihtavuori N160 | <<locked>> | 82% | 32,996 psi | 52% | 2185 fps | 95.8% |
| Vihtavuori N530 | <<locked>> | 80% | 47,529 psi | 74% | 2385 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 40,799 psi | 64% | 2283 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 32,401 psi | 51% | 2185 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 88% | 29,269 psi | 46% | 2178 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,632 psi | 48% | 2116 fps | 97.1% |
| Winchester 748 | <<locked>> | 80% | 47,268 psi | 74% | 2428 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 40,843 psi | 64% | 2375 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 92% | 27,311 psi | 43% | 2178 fps | 95.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 43,192 psi | 68% | 2362 fps | 99.7% |
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 101 powders for .375 Weath. Mag. loaded with the .375 | 300gr | Nosler Partition. ReloadSwiss RS 70 delivers the highest muzzle velocity at 2,674 fps; across all powders the maximum-charge window runs from 1,512 fps to 2,674 fps. Accurate 3100 gives the best case fill at 100 %, and 101 of the 101 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 55–90 %, 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 Power Pro 2000-MR, Hodgdon Superformance, Alliant Reloder-17 rank at the top here: for .375 Weath. Mag. with the .375 | 300gr | Nosler Partition 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.