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:1:16.0
Load data in caliber .375 Weath. Mag. with .375 | 300gr | Nosler CT FailSafe bullet and 105 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% | 56,478 psi | 89% | 2415 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 54,839 psi | 86% | 2444 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 54,795 psi | 86% | 2441 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 56,898 psi | 89% | 2503 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 54,259 psi | 85% | 2444 fps | 97.2% |
| Accurate 4064 | <<locked>> | 92% | 54,520 psi | 85% | 2484 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 53,940 psi | 85% | 2559 fps | 99.7% |
| ADI AR 2206H | <<locked>> | 88% | 55,361 psi | 87% | 2513 fps | 100% |
| ADI AR 2208 | <<locked>> | 94% | 56,362 psi | 88% | 2513 fps | 99.9% |
| ADI Benchmark 8208 | <<locked>> | 86% | 54,491 psi | 85% | 2467 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 55,201 psi | 87% | 2441 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 56,492 psi | 89% | 2562 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 54,911 psi | 86% | 2621 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 56,159 psi | 88% | 2530 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 56,086 psi | 88% | 2418 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 56,956 psi | 89% | 2552 fps | 100% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 52,069 psi | 82% | 2559 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 98% | 56,753 psi | 89% | 2644 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 37,043 psi | 58% | 2329 fps | 98.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 40,944 psi | 64% | 2464 fps | 97.7% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 55,172 psi | 86% | 2530 fps | 99.8% |
| Bofors RP3 | <<locked>> | 94% | 56,710 psi | 89% | 2546 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 56,927 psi | 89% | 2520 fps | 97.9% |
| Hodgdon Benchmark | <<locked>> | 86% | 56,333 psi | 88% | 2451 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 57,392 psi | 90% | 2543 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 55,550 psi | 87% | 2585 fps | 100% |
| Hodgdon H322 | <<locked>> | 82% | 55,129 psi | 86% | 2457 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 56,115 psi | 88% | 2484 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 54,389 psi | 85% | 2516 fps | 99.5% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 56,869 psi | 89% | 2605 fps | 98.5% |
| Hodgdon H4350 | <<locked>> | 96% | 54,563 psi | 86% | 2526 fps | 96.9% |
| Hodgdon H4895 | <<locked>> | 88% | 55,941 psi | 88% | 2520 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 48,196 psi | 76% | 2451 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 55,172 psi | 86% | 2552 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 54,143 psi | 85% | 2592 fps | 97.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,389 psi | 55% | 1490 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 57,203 psi | 90% | 2523 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 55,869 psi | 88% | 2500 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 55,883 psi | 88% | 2497 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 90% | 56,086 psi | 88% | 2480 fps | 98.2% |
| IMR 4198 | <<locked>> | 82% | 56,159 psi | 88% | 2375 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 53,548 psi | 84% | 2497 fps | 97.4% |
| IMR 4451 Enduron | <<locked>> | 96% | 55,477 psi | 87% | 2503 fps | 98.1% |
| IMR 4831ᴾ | <<locked>> | 100% | 51,024 psi | 80% | 2507 fps | 99.5% |
| IMR 4895 | <<locked>> | 90% | 54,679 psi | 86% | 2533 fps | 100% |
| IMR 8208 XBR | <<locked>> | 86% | 54,491 psi | 85% | 2467 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 54,665 psi | 86% | 2454 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 55,129 psi | 86% | 2493 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 55,158 psi | 86% | 2448 fps | 100% |
| Lovex S062 | <<locked>> | 92% | 55,709 psi | 87% | 2493 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 54,723 psi | 86% | 2497 fps | 99% |
| Lovex S070ᴾ | <<locked>> | 100% | 55,477 psi | 87% | 2526 fps | 98.4% |
| Norma 201 | <<locked>> | 90% | 57,711 psi | 90% | 2507 fps | 100% |
| Norma 202 | <<locked>> | 88% | 54,795 psi | 86% | 2464 fps | 100% |
| Norma 203B | <<locked>> | 92% | 56,115 psi | 88% | 2543 fps | 100% |
| Norma 204ᴾ | <<locked>> | 100% | 53,969 psi | 85% | 2539 fps | 96.1% |
| Norma URPᴾ | <<locked>> | 100% | 53,171 psi | 83% | 2549 fps | 99.6% |
| Ramshot Big Game | <<locked>> | 92% | 56,579 psi | 89% | 2566 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 51,866 psi | 81% | 2543 fps | 98.5% |
| Ramshot TAC | <<locked>> | 86% | 54,795 psi | 86% | 2490 fps | 99.2% |
| Ramshot Wild Boar | <<locked>> | 86% | 54,317 psi | 85% | 2507 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 84% | 55,506 psi | 87% | 2474 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,868 psi | 56% | 1526 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 57,725 psi | 90% | 2493 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 54,578 psi | 86% | 2497 fps | 98.5% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 57,479 psi | 90% | 2615 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 56,579 psi | 89% | 2641 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 53,432 psi | 84% | 2579 fps | 99.6% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 53,548 psi | 84% | 2605 fps | 99.4% |
| Rottweil R 901 | <<locked>> | 86% | 55,347 psi | 87% | 2444 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 54,650 psi | 86% | 2461 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 56,579 psi | 89% | 2536 fps | 100% |
| Rottweil R 907 | <<locked>> | 98% | 56,927 psi | 89% | 2520 fps | 97.9% |
| Shooters World Long Rifle | <<locked>> | 98% | 54,723 psi | 86% | 2497 fps | 99% |
| Shooters World Match Rifle | <<locked>> | 88% | 55,129 psi | 86% | 2493 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 55,709 psi | 87% | 2493 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 55,477 psi | 87% | 2526 fps | 98.4% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 57,188 psi | 90% | 2470 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 54,737 psi | 86% | 2549 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 57,246 psi | 90% | 2438 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 56,869 psi | 89% | 2516 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 57,421 psi | 90% | 2536 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 55,883 psi | 88% | 2405 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 55,854 psi | 88% | 2405 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 54,998 psi | 86% | 2454 fps | 98% |
| Somchem S321 | <<locked>> | 84% | 55,637 psi | 87% | 2500 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 55,187 psi | 86% | 2408 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 56,333 psi | 88% | 2507 fps | 100% |
| Somchem S355 | <<locked>> | 96% | 56,869 psi | 89% | 2536 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 47,558 psi | 75% | 2507 fps | 100% |
| Vihtavuori N130 | <<locked>> | 84% | 55,825 psi | 87% | 2372 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 56,028 psi | 88% | 2392 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 54,360 psi | 85% | 2428 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 55,172 psi | 86% | 2444 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 54,897 psi | 86% | 2474 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 55,840 psi | 88% | 2546 fps | 99.7% |
| Vihtavuori N530 | <<locked>> | 86% | 54,969 psi | 86% | 2467 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 56,826 psi | 89% | 2487 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 54,607 psi | 86% | 2549 fps | 99.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 40,103 psi | 63% | 2398 fps | 98.5% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 56,231 psi | 88% | 2526 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 54,810 psi | 86% | 2513 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 57,130 psi | 90% | 2608 fps | 98.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 33,040 psi | 52% | 2323 fps | 98.2% |
| Winchester StaBALL Match | <<locked>> | 90% | 57,087 psi | 89% | 2543 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% | 47,065 psi | 74% | 2300 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 51,285 psi | 80% | 2402 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 39,682 psi | 62% | 2238 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 46,427 psi | 73% | 2369 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 44,715 psi | 70% | 2303 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 37,550 psi | 59% | 2231 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 31,140 psi | 49% | 2169 fps | 95% |
| ADI AR 2206H | <<locked>> | 80% | 43,250 psi | 68% | 2329 fps | 99.2% |
| ADI AR 2208 | <<locked>> | 80% | 36,782 psi | 58% | 2201 fps | 97.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 45,310 psi | 71% | 2336 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 80% | 45,310 psi | 71% | 2320 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 52,939 psi | 83% | 2513 fps | 100% |
| Alliant Power Pro 2000-MR | 64.2 gr | 80% | 39,088 psi | 61% | 2356 fps | 97.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 36,289 psi | 57% | 2221 fps | 98.7% |
| Alliant Reloder-10x | <<locked>> | 80% | 52,881 psi | 83% | 2379 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 39,015 psi | 61% | 2277 fps | 98.2% |
| Alliant Reloder-16 | <<locked>> | 84% | 32,053 psi | 50% | 2182 fps | 95.2% |
| Alliant Reloder-17 | 63.3 gr | 80% | 31,328 psi | 49% | 2195 fps | 96.8% |
| Alliant Reloder-23 | <<locked>> | 92% | 29,124 psi | 46% | 2142 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 96% | 35,781 psi | 56% | 2356 fps | 95.8% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 42,264 psi | 66% | 2336 fps | 98.4% |
| Bofors RP3 | <<locked>> | 80% | 35,897 psi | 56% | 2224 fps | 98.8% |
| Bofors RP7 | <<locked>> | 90% | 44,585 psi | 70% | 2336 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 47,137 psi | 74% | 2326 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 43,830 psi | 69% | 2356 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 48,269 psi | 76% | 2484 fps | 99.6% |
| Hodgdon H322 | <<locked>> | 80% | 51,677 psi | 81% | 2415 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 52,533 psi | 82% | 2441 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 36,709 psi | 58% | 2224 fps | 96.3% |
| Hodgdon H414 | <<locked>> | 90% | 41,104 psi | 64% | 2359 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 92% | 48,022 psi | 75% | 2428 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 43,613 psi | 68% | 2339 fps | 99.6% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 27,543 psi | 43% | 2047 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 39,494 psi | 62% | 2316 fps | 99.4% |
| Hodgdon Superformance | <<locked>> | 92% | 43,874 psi | 69% | 2428 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,324 psi | 41% | 1325 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,901 psi | 66% | 2297 fps | 99.3% |
| IMR 3031 | <<locked>> | 80% | 43,250 psi | 68% | 2336 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,580 psi | 60% | 2228 fps | 98.1% |
| IMR 4166 Enduron | <<locked>> | 80% | 41,147 psi | 64% | 2247 fps | 95% |
| IMR 4198 | <<locked>> | 80% | 53,084 psi | 83% | 2339 fps | 100% |
| IMR 4350 | <<locked>> | 94% | 44,498 psi | 70% | 2359 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 88% | 43,482 psi | 68% | 2320 fps | 95.6% |
| IMR 4831 | <<locked>> | 86% | 32,445 psi | 51% | 2182 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 39,929 psi | 63% | 2303 fps | 98.8% |
| IMR 8208 XBR | <<locked>> | 80% | 45,310 psi | 71% | 2336 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 80% | 51,155 psi | 80% | 2411 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 42,119 psi | 66% | 2313 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 43,540 psi | 68% | 2277 fps | 99.3% |
| Lovex S062 | <<locked>> | 80% | 38,595 psi | 60% | 2234 fps | 99.4% |
| Lovex S065 | <<locked>> | 86% | 38,000 psi | 60% | 2228 fps | 95.7% |
| Lovex S070 | <<locked>> | 90% | 40,712 psi | 64% | 2297 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 42,424 psi | 66% | 2290 fps | 99.8% |
| Norma 202 | <<locked>> | 80% | 42,598 psi | 67% | 2297 fps | 100% |
| Norma 203B | <<locked>> | 80% | 38,377 psi | 60% | 2264 fps | 98.5% |
| Norma 204 | <<locked>> | 98% | 50,575 psi | 79% | 2490 fps | 95.4% |
| Norma URP | <<locked>> | 84% | 31,807 psi | 50% | 2172 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 37,695 psi | 59% | 2274 fps | 98.2% |
| Ramshot Hunter | <<locked>> | 90% | 37,811 psi | 59% | 2303 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 45,063 psi | 71% | 2343 fps | 97.7% |
| Ramshot Wild Boar | <<locked>> | 80% | 44,483 psi | 70% | 2359 fps | 99.4% |
| Ramshot X-Terminator | <<locked>> | 80% | 48,863 psi | 77% | 2382 fps | 99.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,658 psi | 42% | 1358 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 50,778 psi | 80% | 2405 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 39,668 psi | 62% | 2257 fps | 95.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 40,828 psi | 64% | 2365 fps | 98.6% |
| ReloadSwiss RS 60 | 63.3 gr | 80% | 33,359 psi | 52% | 2251 fps | 99.5% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 33,170 psi | 52% | 2231 fps | 95.3% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 35,940 psi | 56% | 2290 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 46,427 psi | 73% | 2323 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 40,292 psi | 63% | 2247 fps | 99.5% |
| Rottweil R 903 | <<locked>> | 80% | 33,663 psi | 53% | 2172 fps | 98% |
| Rottweil R 907 | <<locked>> | 90% | 44,585 psi | 70% | 2336 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 86% | 38,000 psi | 60% | 2228 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 42,119 psi | 66% | 2313 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 38,595 psi | 60% | 2234 fps | 99.4% |
| Shooters World SW4350 | <<locked>> | 90% | 40,712 psi | 64% | 2297 fps | 95.3% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 53,476 psi | 84% | 2425 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,693 psi | 54% | 2221 fps | 97.5% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 53,679 psi | 84% | 2395 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 43,366 psi | 68% | 2320 fps | 97.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,756 psi | 65% | 2306 fps | 99% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,816 psi | 69% | 2244 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,361 psi | 57% | 2133 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 42,482 psi | 67% | 2270 fps | 95.5% |
| Somchem S321 | <<locked>> | 80% | 48,820 psi | 77% | 2408 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 43,439 psi | 68% | 2251 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 43,062 psi | 67% | 2320 fps | 99.2% |
| Somchem S355 | <<locked>> | 80% | 34,679 psi | 54% | 2182 fps | 98% |
| Somchem S365 | <<locked>> | 80% | 25,150 psi | 39% | 2034 fps | 95.5% |
| Vihtavuori N130 | <<locked>> | 80% | 49,487 psi | 78% | 2293 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 44,106 psi | 69% | 2238 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 39,697 psi | 62% | 2231 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 40,277 psi | 63% | 2238 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,837 psi | 51% | 2126 fps | 98.7% |
| Vihtavuori N160 | <<locked>> | 84% | 33,272 psi | 52% | 2175 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 45,411 psi | 71% | 2336 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 80% | 38,769 psi | 61% | 2231 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 32,605 psi | 51% | 2175 fps | 95% |
| Vihtavuori N555 | <<locked>> | 92% | 31,111 psi | 49% | 2211 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 29,240 psi | 46% | 2060 fps | 96% |
| Winchester 748 | <<locked>> | 80% | 44,759 psi | 70% | 2372 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 41,278 psi | 65% | 2362 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 96% | 29,153 psi | 46% | 2211 fps | 96.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 41,104 psi | 64% | 2310 fps | 99.3% |
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 105 powders for .375 Weath. Mag. loaded with the .375 | 300gr | Nosler CT FailSafe. Alliant Reloder-17 delivers the highest muzzle velocity at 2,644 fps; across all powders the maximum-charge window runs from 1,490 fps to 2,644 fps. Accurate 4350 gives the best case fill at 100 %, and 105 of the 105 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 52–90 %, leaving at least 10 % headroom. The 300.0 gr projectile in 0.375" calls for a 1:16.0 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 Weath. Mag. with the .375 | 300gr | Nosler CT FailSafe 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.