Load Specifications
Bullet Manufacturer:Sierra
Bullet Weight:300 gr
Bullet Diameter:0.375"
Bullet Length:<<locked>>
Caliber:.375 Blaser Mag. load data
Case Length (l3):2.814"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:107.5 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:25.6"
Max. allowed Pressure:60,916 psi
Recommended Twist Rate:1:6.0
Load data in caliber .375 Blaser Mag. with .375 | 300gr | Sierra GameKing bullet and 106 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, 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: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 82% | 54,940 psi | 90% | 2464 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 54,027 psi | 89% | 2497 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 52,620 psi | 86% | 2507 fps | 98.1% |
| Accurate 3100ᴾ | <<locked>> | 100% | 44,353 psi | 73% | 2480 fps | 98.3% |
| Accurate 4064 | <<locked>> | 88% | 54,056 psi | 89% | 2543 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 53,809 psi | 88% | 2631 fps | 100% |
| ADI AR 2206H | <<locked>> | 84% | 54,099 psi | 89% | 2572 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 55,056 psi | 90% | 2575 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 51,924 psi | 85% | 2618 fps | 97.3% |
| ADI Benchmark 8208 | <<locked>> | 82% | 52,997 psi | 87% | 2523 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 54,230 psi | 89% | 2490 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 53,548 psi | 88% | 2687 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 51,721 psi | 85% | 2615 fps | 97.4% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 51,721 psi | 85% | 2615 fps | 97.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 51,953 psi | 85% | 2549 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 52,272 psi | 86% | 2569 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 98% | 54,781 psi | 90% | 2680 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 52,344 psi | 86% | 2664 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 50,952 psi | 84% | 2608 fps | 97.3% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 44,628 psi | 73% | 2549 fps | 96% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 41,930 psi | 69% | 2503 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 37,028 psi | 61% | 2421 fps | 97.1% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 47,094 psi | 77% | 2667 fps | 99.8% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 53,621 psi | 88% | 2589 fps | 100% |
| Bofors RP3 | <<locked>> | 88% | 52,373 psi | 86% | 2562 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 44,628 psi | 73% | 2549 fps | 96% |
| Bofors RP7 | <<locked>> | 92% | 52,330 psi | 86% | 2543 fps | 98.3% |
| Hodgdon Benchmark | <<locked>> | 82% | 54,621 psi | 90% | 2503 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 52,373 psi | 86% | 2552 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 53,113 psi | 87% | 2575 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 94% | 52,939 psi | 87% | 2631 fps | 99% |
| Hodgdon H4350 | <<locked>> | 92% | 53,490 psi | 88% | 2595 fps | 98% |
| Hodgdon H4895 | <<locked>> | 84% | 54,650 psi | 90% | 2579 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 54,679 psi | 90% | 2608 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 54,215 psi | 89% | 2615 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 53,055 psi | 87% | 2667 fps | 98.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,897 psi | 59% | 1555 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 52,257 psi | 86% | 2533 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 54,868 psi | 90% | 2556 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 54,665 psi | 90% | 2559 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 54,143 psi | 89% | 2539 fps | 98.9% |
| IMR 4350 | <<locked>> | 96% | 52,765 psi | 87% | 2572 fps | 98.4% |
| IMR 4451 Enduron | <<locked>> | 92% | 54,085 psi | 89% | 2569 fps | 98.9% |
| IMR 4831 | <<locked>> | 98% | 54,375 psi | 89% | 2625 fps | 100% |
| IMR 4895 | <<locked>> | 86% | 53,635 psi | 88% | 2592 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 52,997 psi | 87% | 2523 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 53,896 psi | 88% | 2546 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 53,505 psi | 88% | 2503 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 54,491 psi | 89% | 2552 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 53,693 psi | 88% | 2566 fps | 99.6% |
| Lovex S070 | <<locked>> | 96% | 54,607 psi | 90% | 2598 fps | 99.2% |
| Lovex S071ᴾ | <<locked>> | 100% | 36,854 psi | 61% | 2346 fps | 96.5% |
| Norma 201 | <<locked>> | 84% | 52,794 psi | 87% | 2516 fps | 100% |
| Norma 202 | <<locked>> | 84% | 53,345 psi | 88% | 2516 fps | 100% |
| Norma 203B | <<locked>> | 88% | 54,940 psi | 90% | 2602 fps | 100% |
| Norma 204 | <<locked>> | 96% | 53,040 psi | 87% | 2615 fps | 97.4% |
| Norma MRPᴾ | <<locked>> | 100% | 46,934 psi | 77% | 2625 fps | 98% |
| Norma URP | <<locked>> | 96% | 52,750 psi | 87% | 2621 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 51,837 psi | 85% | 2579 fps | 100% |
| Ramshot Hunter | <<locked>> | 98% | 55,085 psi | 90% | 2671 fps | 99.6% |
| Ramshot TAC | <<locked>> | 82% | 53,011 psi | 87% | 2546 fps | 99.6% |
| Ramshot Wild Boar | <<locked>> | 82% | 52,736 psi | 87% | 2559 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,376 psi | 60% | 1591 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 53,403 psi | 88% | 2562 fps | 99.2% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 52,866 psi | 87% | 2628 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 52,228 psi | 86% | 2661 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 53,505 psi | 88% | 2657 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 52,533 psi | 86% | 2680 fps | 99.9% |
| Rottweil R 901 | <<locked>> | 82% | 53,969 psi | 89% | 2497 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 53,534 psi | 88% | 2520 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 52,417 psi | 86% | 2556 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 53,795 psi | 88% | 2592 fps | 96.5% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 49,632 psi | 81% | 2589 fps | 97.2% |
| Rottweil R 907 | <<locked>> | 92% | 52,330 psi | 86% | 2543 fps | 98.3% |
| Shooters World Long Rifle | <<locked>> | 94% | 53,693 psi | 88% | 2566 fps | 99.6% |
| Shooters World Match Rifle | <<locked>> | 84% | 53,896 psi | 88% | 2546 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 54,491 psi | 89% | 2552 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 54,607 psi | 90% | 2598 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 53,795 psi | 88% | 2612 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 55,114 psi | 90% | 2575 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 52,489 psi | 86% | 2546 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 54,288 psi | 89% | 2457 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 54,491 psi | 89% | 2457 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 53,751 psi | 88% | 2523 fps | 98.9% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 49,153 psi | 81% | 2585 fps | 97.1% |
| Somchem S335 | <<locked>> | 84% | 53,563 psi | 88% | 2454 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 54,665 psi | 90% | 2562 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 52,765 psi | 87% | 2556 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 54,491 psi | 89% | 2667 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 50,488 psi | 83% | 2572 fps | 98.1% |
| Vihtavuori N133 | <<locked>> | 84% | 54,607 psi | 90% | 2441 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 53,287 psi | 87% | 2480 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 53,998 psi | 89% | 2500 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 53,853 psi | 88% | 2533 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 51,706 psi | 85% | 2569 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 43,540 psi | 71% | 2448 fps | 96.1% |
| Vihtavuori N530 | <<locked>> | 82% | 53,243 psi | 87% | 2520 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 52,040 psi | 85% | 2497 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 54,288 psi | 89% | 2625 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 46,485 psi | 76% | 2572 fps | 99.9% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 55,085 psi | 90% | 2592 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 53,461 psi | 88% | 2566 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 53,127 psi | 87% | 2635 fps | 99% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 37,652 psi | 62% | 2536 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 52,272 psi | 86% | 2552 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 47,326 psi | 78% | 2513 fps | 96.3% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 51,692 psi | 85% | 2425 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 44,599 psi | 73% | 2369 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 43,236 psi | 71% | 2359 fps | 96.2% |
| Accurate 3100 | <<locked>> | 92% | 33,852 psi | 56% | 2287 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 42,177 psi | 69% | 2372 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 31,140 psi | 51% | 2234 fps | 96.5% |
| ADI AR 2206H | <<locked>> | 80% | 47,659 psi | 78% | 2477 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 40,640 psi | 67% | 2346 fps | 99.2% |
| ADI AR 2209 | <<locked>> | 94% | 42,873 psi | 70% | 2464 fps | 95% |
| ADI Benchmark 8208 | <<locked>> | 80% | 49,734 psi | 82% | 2477 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 50,662 psi | 83% | 2448 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 43,656 psi | 72% | 2526 fps | 99.7% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 42,685 psi | 70% | 2464 fps | 95.2% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 42,685 psi | 70% | 2464 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,437 psi | 66% | 2369 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 43,323 psi | 71% | 2428 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 80% | 31,473 psi | 52% | 2247 fps | 96.6% |
| Alliant Reloder-17 | 70.2 gr | 80% | 34,998 psi | 57% | 2359 fps | 99.2% |
| Alliant Reloder-19 | <<locked>> | 94% | 42,134 psi | 69% | 2457 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 98% | 41,858 psi | 69% | 2500 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 84% | 25,730 psi | 42% | 2123 fps | 95.5% |
| Alliant Reloder-25 | <<locked>> | 96% | 32,837 psi | 54% | 2320 fps | 95.2% |
| Alliant Reloder-26 | <<locked>> | 88% | 31,053 psi | 51% | 2323 fps | 95.6% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 47,007 psi | 77% | 2490 fps | 99.7% |
| Bofors RP3 | <<locked>> | 80% | 40,379 psi | 66% | 2379 fps | 99.9% |
| Bofors RP5 | <<locked>> | 98% | 41,858 psi | 69% | 2500 fps | 95.2% |
| Bofors RP7 | <<locked>> | 82% | 38,450 psi | 63% | 2303 fps | 95.1% |
| Hodgdon Benchmark | <<locked>> | 80% | 51,329 psi | 84% | 2457 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 48,950 psi | 80% | 2503 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 40,988 psi | 67% | 2382 fps | 98.5% |
| Hodgdon H414 | <<locked>> | 82% | 35,665 psi | 59% | 2326 fps | 95% |
| Hodgdon H4350 | <<locked>> | 84% | 41,481 psi | 68% | 2398 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 48,167 psi | 79% | 2487 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 28,877 psi | 47% | 2156 fps | 97.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 44,295 psi | 73% | 2467 fps | 100% |
| Hodgdon Superformance | <<locked>> | 86% | 40,074 psi | 66% | 2444 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,832 psi | 44% | 1388 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 46,151 psi | 76% | 2444 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 48,341 psi | 79% | 2470 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 42,714 psi | 70% | 2375 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 80% | 45,049 psi | 74% | 2398 fps | 97.5% |
| IMR 4350 | <<locked>> | 86% | 38,754 psi | 64% | 2333 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 37,550 psi | 62% | 2287 fps | 95.3% |
| IMR 4831 | <<locked>> | 80% | 30,327 psi | 50% | 2198 fps | 96.2% |
| IMR 4895 | <<locked>> | 80% | 44,411 psi | 73% | 2454 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 80% | 49,734 psi | 82% | 2477 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 47,311 psi | 78% | 2457 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 47,384 psi | 78% | 2415 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 42,685 psi | 70% | 2375 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 35,157 psi | 58% | 2244 fps | 96.2% |
| Lovex S070 | <<locked>> | 82% | 35,520 psi | 58% | 2270 fps | 95.1% |
| Lovex S071 | <<locked>> | 98% | 34,548 psi | 57% | 2300 fps | 95.8% |
| Norma 201 | <<locked>> | 80% | 46,789 psi | 77% | 2431 fps | 100% |
| Norma 202 | <<locked>> | 80% | 47,094 psi | 77% | 2431 fps | 100% |
| Norma 203B | <<locked>> | 80% | 42,699 psi | 70% | 2415 fps | 99.8% |
| Norma 204 | <<locked>> | 90% | 43,395 psi | 71% | 2457 fps | 95.2% |
| Norma MRP | <<locked>> | 94% | 38,508 psi | 63% | 2464 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 31,517 psi | 52% | 2234 fps | 96.4% |
| Ramshot Big Game | <<locked>> | 80% | 42,409 psi | 70% | 2434 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 84% | 34,954 psi | 57% | 2320 fps | 95.7% |
| Ramshot TAC | <<locked>> | 80% | 49,676 psi | 82% | 2497 fps | 99.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 49,327 psi | 81% | 2510 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,195 psi | 45% | 1421 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 41,205 psi | 68% | 2365 fps | 97.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 46,035 psi | 76% | 2526 fps | 99.8% |
| ReloadSwiss RS 60 | 70.2 gr | 80% | 37,231 psi | 61% | 2411 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 30,850 psi | 51% | 2247 fps | 95.9% |
| ReloadSwiss RS 70 | 73.1 gr | 82% | 32,953 psi | 54% | 2303 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 80% | 50,879 psi | 84% | 2454 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 44,483 psi | 73% | 2388 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 37,956 psi | 62% | 2326 fps | 99.6% |
| Rottweil R 904 | <<locked>> | 96% | 47,369 psi | 78% | 2493 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 96% | 43,584 psi | 72% | 2490 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 82% | 38,450 psi | 63% | 2303 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 35,157 psi | 58% | 2244 fps | 96.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 47,311 psi | 78% | 2457 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 42,685 psi | 70% | 2375 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 35,520 psi | 58% | 2270 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 38,827 psi | 64% | 2372 fps | 99.3% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 48,153 psi | 79% | 2477 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 46,151 psi | 76% | 2454 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 47,979 psi | 79% | 2372 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,118 psi | 66% | 2260 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 36,477 psi | 60% | 2238 fps | 95.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 43,178 psi | 71% | 2484 fps | 95.6% |
| Somchem S335 | <<locked>> | 80% | 47,601 psi | 78% | 2375 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 47,819 psi | 79% | 2467 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 38,682 psi | 64% | 2329 fps | 99.6% |
| Somchem S365 | <<locked>> | 80% | 28,282 psi | 46% | 2198 fps | 98.5% |
| Somchem S385 | <<locked>> | 92% | 38,870 psi | 64% | 2375 fps | 95.3% |
| Vihtavuori N133 | <<locked>> | 80% | 48,370 psi | 79% | 2362 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 44,309 psi | 73% | 2359 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 44,672 psi | 73% | 2372 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 36,753 psi | 60% | 2270 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 32,793 psi | 54% | 2234 fps | 96.8% |
| Vihtavuori N165 | <<locked>> | 98% | 40,785 psi | 67% | 2398 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 50,067 psi | 82% | 2477 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 43,033 psi | 71% | 2369 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 32,372 psi | 53% | 2238 fps | 96.4% |
| Vihtavuori N555 | <<locked>> | 84% | 27,659 psi | 45% | 2188 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,387 psi | 53% | 2211 fps | 98.6% |
| Winchester 748 | <<locked>> | 80% | 50,053 psi | 82% | 2520 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 35,824 psi | 59% | 2329 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 88% | 25,686 psi | 42% | 2192 fps | 96% |
| Winchester StaBALL Match | <<locked>> | 80% | 45,832 psi | 75% | 2457 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 44,280 psi | 73% | 2461 fps | 95.5% |
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 106 powders for .375 Blaser Mag. loaded with the .375 | 300gr | Sierra GameKing. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,687 fps; across all powders the maximum-charge window runs from 1,555 fps to 2,687 fps. Accurate 3100 gives the best case fill at 100 %, and 106 of the 106 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (420 MPa), the top charges use 59–90 %, 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. ReloadSwiss RS 70, Alliant Reloder-17, ReloadSwiss RS 60 rank at the top here: for .375 Blaser Mag. with the .375 | 300gr | Sierra GameKing 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.