Load Specifications
Bullet Manufacturer:SUS-TAC
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 | SUS-TAC Solid Flat Nose 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% | 56,391 psi | 88% | 2441 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 55,303 psi | 87% | 2470 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 56,985 psi | 89% | 2530 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 54,157 psi | 85% | 2477 fps | 97.7% |
| Accurate 3100ᴾ | <<locked>> | 100% | 41,989 psi | 66% | 2392 fps | 97.1% |
| Accurate 4064 | <<locked>> | 90% | 55,347 psi | 87% | 2516 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 54,897 psi | 86% | 2598 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 86% | 55,506 psi | 87% | 2543 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 56,521 psi | 89% | 2543 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 49,922 psi | 78% | 2526 fps | 95.9% |
| ADI Benchmark 8208 | <<locked>> | 84% | 54,505 psi | 85% | 2497 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 55,637 psi | 87% | 2467 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 55,158 psi | 86% | 2657 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 49,458 psi | 78% | 2523 fps | 96% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 56,710 psi | 89% | 2566 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 57,087 psi | 89% | 2582 fps | 100% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 55,985 psi | 88% | 2648 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 96% | 57,421 psi | 90% | 2680 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 48,733 psi | 76% | 2516 fps | 95.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 40,205 psi | 63% | 2421 fps | 99.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 44,802 psi | 70% | 2569 fps | 99% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 55,216 psi | 87% | 2559 fps | 99.9% |
| Bofors RP3 | <<locked>> | 92% | 57,377 psi | 90% | 2579 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 57,276 psi | 90% | 2559 fps | 98.4% |
| Hodgdon Benchmark | <<locked>> | 84% | 56,246 psi | 88% | 2477 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 57,377 psi | 90% | 2569 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 55,927 psi | 88% | 2618 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 54,491 psi | 85% | 2546 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 96% | 54,070 psi | 85% | 2595 fps | 98.6% |
| Hodgdon H4350 | <<locked>> | 94% | 54,781 psi | 86% | 2559 fps | 97.5% |
| Hodgdon H4895 | <<locked>> | 86% | 56,057 psi | 88% | 2549 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 52,344 psi | 82% | 2533 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 55,535 psi | 87% | 2582 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 54,418 psi | 85% | 2631 fps | 98.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,636 psi | 56% | 1519 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 57,290 psi | 90% | 2552 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 56,318 psi | 88% | 2530 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 55,999 psi | 88% | 2526 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 88% | 55,854 psi | 88% | 2513 fps | 98.6% |
| IMR 4350ᴾ | <<locked>> | 100% | 57,377 psi | 90% | 2582 fps | 98.4% |
| IMR 4451 Enduron | <<locked>> | 94% | 55,695 psi | 87% | 2539 fps | 98.5% |
| IMR 4831ᴾ | <<locked>> | 100% | 55,317 psi | 87% | 2589 fps | 99.9% |
| IMR 4895 | <<locked>> | 88% | 54,998 psi | 86% | 2562 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 54,505 psi | 85% | 2497 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 55,288 psi | 87% | 2520 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 54,969 psi | 86% | 2474 fps | 100% |
| Lovex S062 | <<locked>> | 90% | 55,956 psi | 88% | 2523 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 54,998 psi | 86% | 2533 fps | 99.4% |
| Lovex S070 | <<locked>> | 98% | 55,985 psi | 88% | 2566 fps | 98.8% |
| Norma 201 | <<locked>> | 88% | 57,725 psi | 90% | 2536 fps | 100% |
| Norma 202 | <<locked>> | 86% | 54,897 psi | 86% | 2490 fps | 100% |
| Norma 203B | <<locked>> | 90% | 56,246 psi | 88% | 2572 fps | 100% |
| Norma 204 | <<locked>> | 98% | 54,505 psi | 85% | 2579 fps | 96.9% |
| Norma MRPᴾ | <<locked>> | 100% | 44,715 psi | 70% | 2526 fps | 96.6% |
| Norma URPᴾ | <<locked>> | 100% | 57,609 psi | 90% | 2635 fps | 100% |
| Ramshot Big Game | <<locked>> | 90% | 57,014 psi | 89% | 2598 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 56,246 psi | 88% | 2635 fps | 99.4% |
| Ramshot TAC | <<locked>> | 84% | 54,578 psi | 86% | 2516 fps | 99.4% |
| Ramshot Wild Boar | <<locked>> | 84% | 54,201 psi | 85% | 2533 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 55,129 psi | 86% | 2497 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,289 psi | 57% | 1558 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 57,450 psi | 90% | 2520 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 54,853 psi | 86% | 2533 fps | 98.9% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 54,186 psi | 85% | 2598 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 57,217 psi | 90% | 2677 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 54,462 psi | 85% | 2618 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 54,041 psi | 85% | 2648 fps | 99.7% |
| Rottweil R 901 | <<locked>> | 84% | 55,376 psi | 87% | 2470 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 54,839 psi | 86% | 2490 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 57,246 psi | 90% | 2572 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 47,427 psi | 74% | 2500 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 96% | 57,276 psi | 90% | 2559 fps | 98.4% |
| Shooters World Long Rifle | <<locked>> | 96% | 54,998 psi | 86% | 2533 fps | 99.4% |
| Shooters World Match Rifle | <<locked>> | 86% | 55,288 psi | 87% | 2520 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 55,956 psi | 88% | 2523 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 55,985 psi | 88% | 2566 fps | 98.8% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 55,245 psi | 87% | 2582 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 56,855 psi | 89% | 2549 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 57,290 psi | 90% | 2562 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 55,709 psi | 87% | 2431 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 55,898 psi | 88% | 2431 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 55,317 psi | 87% | 2490 fps | 98.5% |
| Somchem S321 | <<locked>> | 82% | 55,593 psi | 87% | 2526 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 55,114 psi | 86% | 2431 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 56,333 psi | 88% | 2536 fps | 100% |
| Somchem S355 | <<locked>> | 94% | 57,232 psi | 90% | 2566 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 51,851 psi | 81% | 2585 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 48,167 psi | 75% | 2484 fps | 96.9% |
| Vihtavuori N130 | <<locked>> | 82% | 55,579 psi | 87% | 2395 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 55,985 psi | 88% | 2415 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 54,708 psi | 86% | 2454 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 55,419 psi | 87% | 2474 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 55,361 psi | 87% | 2503 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 56,449 psi | 88% | 2582 fps | 99.9% |
| Vihtavuori N530 | <<locked>> | 84% | 54,868 psi | 86% | 2493 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 56,826 psi | 89% | 2513 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 55,317 psi | 87% | 2589 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 44,092 psi | 69% | 2484 fps | 99.4% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 56,536 psi | 89% | 2559 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 55,042 psi | 86% | 2539 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 54,273 psi | 85% | 2598 fps | 98.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 35,940 psi | 56% | 2434 fps | 99.6% |
| Winchester StaBALL Match | <<locked>> | 88% | 57,363 psi | 90% | 2572 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% | 50,096 psi | 79% | 2362 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 42,801 psi | 67% | 2303 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 49,850 psi | 78% | 2438 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 44,686 psi | 70% | 2333 fps | 95.7% |
| Accurate 3100 | <<locked>> | 96% | 36,680 psi | 57% | 2293 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 40,495 psi | 63% | 2303 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 31,807 psi | 50% | 2201 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 46,166 psi | 72% | 2405 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 80% | 39,247 psi | 62% | 2274 fps | 98.4% |
| ADI AR 2209 | <<locked>> | 98% | 46,818 psi | 73% | 2477 fps | 95.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 48,196 psi | 76% | 2408 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 48,878 psi | 77% | 2388 fps | 100% |
| Alliant Power Pro 2000-MR | 68.9 gr | 80% | 41,974 psi | 66% | 2441 fps | 99% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 46,485 psi | 73% | 2477 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 38,972 psi | 61% | 2293 fps | 99.4% |
| Alliant Reloder-15 | <<locked>> | 80% | 41,814 psi | 66% | 2352 fps | 99% |
| Alliant Reloder-16 | <<locked>> | 80% | 30,327 psi | 48% | 2165 fps | 95% |
| Alliant Reloder-17 | 67.8 gr | 80% | 33,562 psi | 53% | 2274 fps | 98.2% |
| Alliant Reloder-19 | <<locked>> | 98% | 45,832 psi | 72% | 2470 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 88% | 27,905 psi | 44% | 2133 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 92% | 33,924 psi | 53% | 2339 fps | 95.8% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 45,295 psi | 71% | 2411 fps | 99.2% |
| Bofors RP3 | <<locked>> | 80% | 38,696 psi | 61% | 2300 fps | 99.5% |
| Bofors RP7 | <<locked>> | 86% | 41,974 psi | 66% | 2320 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 49,835 psi | 78% | 2392 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 47,123 psi | 74% | 2431 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 52,083 psi | 82% | 2566 fps | 99.9% |
| Hodgdon H380 | <<locked>> | 80% | 39,450 psi | 62% | 2303 fps | 97.6% |
| Hodgdon H414 | <<locked>> | 86% | 38,914 psi | 61% | 2343 fps | 95.1% |
| Hodgdon H4350 | <<locked>> | 88% | 45,353 psi | 71% | 2415 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 46,586 psi | 73% | 2415 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 27,818 psi | 44% | 2080 fps | 95.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 42,467 psi | 67% | 2392 fps | 99.8% |
| Hodgdon Superformance | 78.9 gr | 88% | 41,191 psi | 65% | 2408 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,629 psi | 42% | 1358 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 44,672 psi | 70% | 2372 fps | 99.8% |
| IMR 3031 | <<locked>> | 80% | 46,441 psi | 73% | 2402 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 41,234 psi | 65% | 2303 fps | 99% |
| IMR 4166 Enduron | <<locked>> | 80% | 43,598 psi | 68% | 2323 fps | 96.3% |
| IMR 4350 | <<locked>> | 90% | 42,221 psi | 66% | 2349 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 84% | 41,104 psi | 64% | 2303 fps | 95.5% |
| IMR 4831 | <<locked>> | 82% | 30,879 psi | 48% | 2165 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 42,844 psi | 67% | 2379 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 80% | 48,196 psi | 76% | 2408 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 45,324 psi | 71% | 2385 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 45,948 psi | 72% | 2343 fps | 99.7% |
| Lovex S062 | <<locked>> | 80% | 41,162 psi | 65% | 2306 fps | 99.8% |
| Lovex S065 | <<locked>> | 82% | 35,940 psi | 56% | 2211 fps | 95.6% |
| Lovex S070 | <<locked>> | 86% | 38,667 psi | 61% | 2287 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 45,237 psi | 71% | 2359 fps | 100% |
| Norma 202 | <<locked>> | 80% | 45,498 psi | 71% | 2362 fps | 100% |
| Norma 203B | <<locked>> | 80% | 41,191 psi | 65% | 2343 fps | 99.3% |
| Norma 204 | <<locked>> | 94% | 47,776 psi | 75% | 2477 fps | 95.4% |
| Norma MRP | <<locked>> | 98% | 41,974 psi | 66% | 2474 fps | 95.8% |
| Norma URP | <<locked>> | 82% | 32,256 psi | 51% | 2205 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 40,712 psi | 64% | 2356 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 88% | 38,029 psi | 60% | 2336 fps | 95.8% |
| Ramshot TAC | <<locked>> | 80% | 47,921 psi | 75% | 2418 fps | 98.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 47,601 psi | 75% | 2434 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 80% | 51,735 psi | 81% | 2451 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,992 psi | 42% | 1391 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 53,838 psi | 84% | 2474 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 39,798 psi | 62% | 2287 fps | 96% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 44,208 psi | 69% | 2448 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 35,723 psi | 56% | 2329 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 31,473 psi | 49% | 2215 fps | 95.2% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 33,750 psi | 53% | 2267 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 49,153 psi | 77% | 2388 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 42,917 psi | 67% | 2316 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 36,477 psi | 57% | 2251 fps | 99% |
| Rottweil R 905 | <<locked>> | 98% | 44,440 psi | 70% | 2451 fps | 95% |
| Rottweil R 907 | <<locked>> | 86% | 41,974 psi | 66% | 2320 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 82% | 35,940 psi | 56% | 2211 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 45,324 psi | 71% | 2385 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 41,162 psi | 65% | 2306 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 38,667 psi | 61% | 2287 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 37,318 psi | 58% | 2297 fps | 98.5% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 46,427 psi | 73% | 2398 fps | 98.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 44,556 psi | 70% | 2379 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 46,354 psi | 73% | 2306 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 38,667 psi | 61% | 2195 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 40,089 psi | 63% | 2257 fps | 95.4% |
| Somchem S321 | <<locked>> | 80% | 52,112 psi | 82% | 2480 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 46,122 psi | 72% | 2313 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 46,122 psi | 72% | 2395 fps | 99.7% |
| Somchem S355 | <<locked>> | 80% | 37,246 psi | 58% | 2257 fps | 98.9% |
| Somchem S365 | <<locked>> | 80% | 27,064 psi | 42% | 2113 fps | 97.2% |
| Somchem S385 | <<locked>> | 96% | 42,221 psi | 66% | 2388 fps | 95.4% |
| Vihtavuori N130 | <<locked>> | 80% | 52,214 psi | 82% | 2352 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 46,731 psi | 73% | 2300 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 42,569 psi | 67% | 2293 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 43,163 psi | 68% | 2306 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 35,404 psi | 55% | 2198 fps | 99.4% |
| Vihtavuori N160 | <<locked>> | 80% | 31,531 psi | 49% | 2156 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 48,327 psi | 76% | 2405 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 41,510 psi | 65% | 2300 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 33,011 psi | 52% | 2205 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 88% | 29,878 psi | 47% | 2198 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,241 psi | 49% | 2136 fps | 97.5% |
| Winchester 748 | <<locked>> | 80% | 48,124 psi | 75% | 2448 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 39,073 psi | 61% | 2346 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 92% | 27,891 psi | 44% | 2205 fps | 96.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 44,092 psi | 69% | 2385 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 | SUS-TAC Solid Flat Nose. Alliant Reloder-17 delivers the highest muzzle velocity at 2,680 fps; across all powders the maximum-charge window runs from 1,519 fps to 2,680 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 | SUS-TAC Solid Flat Nose 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.