Load Specifications
Load data in caliber .375 Blaser Mag. with .375 | 270gr | Hammer Shock Hammer bullet and 99 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.
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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>> | 84% | 52,518 psi | 86% | 2562 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 54,273 psi | 89% | 2631 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 53,969 psi | 89% | 2625 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 52,576 psi | 86% | 2648 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 53,737 psi | 88% | 2628 fps | 96.9% |
| Accurate 4064 | <<locked>> | 92% | 53,896 psi | 88% | 2671 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 53,229 psi | 87% | 2749 fps | 99.6% |
| ADI AR 2206H | <<locked>> | 88% | 54,839 psi | 90% | 2703 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 52,591 psi | 86% | 2657 fps | 99.7% |
| ADI Benchmark 8208 | <<locked>> | 86% | 54,012 psi | 89% | 2657 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 54,476 psi | 89% | 2631 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 54,288 psi | 89% | 2818 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 52,156 psi | 86% | 2677 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 52,779 psi | 87% | 2697 fps | 99.8% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 51,561 psi | 85% | 2753 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 96% | 52,518 psi | 86% | 2789 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,608 psi | 60% | 2500 fps | 98.3% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 40,582 psi | 67% | 2644 fps | 97.3% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 54,476 psi | 89% | 2720 fps | 99.7% |
| Bofors RP3 | <<locked>> | 92% | 52,475 psi | 86% | 2690 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 52,953 psi | 87% | 2657 fps | 97% |
| Hodgdon Benchmark | <<locked>> | 84% | 52,533 psi | 86% | 2595 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 52,997 psi | 87% | 2687 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 54,955 psi | 90% | 2782 fps | 99.9% |
| Hodgdon H322 | <<locked>> | 82% | 54,650 psi | 90% | 2651 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 53,780 psi | 88% | 2703 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 98% | 52,852 psi | 87% | 2746 fps | 97.8% |
| Hodgdon H4350 | <<locked>> | 96% | 53,824 psi | 88% | 2710 fps | 96.5% |
| Hodgdon H4895 | <<locked>> | 86% | 52,083 psi | 86% | 2667 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 47,732 psi | 78% | 2638 fps | 99.8% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 54,534 psi | 90% | 2746 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 53,592 psi | 88% | 2779 fps | 97.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,346 psi | 58% | 1617 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 53,272 psi | 87% | 2667 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 51,677 psi | 85% | 2648 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 52,054 psi | 85% | 2638 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 88% | 52,199 psi | 86% | 2618 fps | 97.4% |
| IMR 4350ᴾ | <<locked>> | 100% | 52,982 psi | 87% | 2680 fps | 97.1% |
| IMR 4451 Enduron | <<locked>> | 96% | 54,897 psi | 90% | 2690 fps | 97.8% |
| IMR 4831ᴾ | <<locked>> | 100% | 50,430 psi | 83% | 2690 fps | 99.4% |
| IMR 4895 | <<locked>> | 90% | 54,114 psi | 89% | 2726 fps | 100% |
| IMR 8208 XBR | <<locked>> | 86% | 54,012 psi | 89% | 2657 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 54,085 psi | 89% | 2644 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 54,404 psi | 89% | 2680 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 54,708 psi | 90% | 2635 fps | 100% |
| Lovex S062 | <<locked>> | 92% | 54,940 psi | 90% | 2680 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 54,157 psi | 89% | 2684 fps | 98.8% |
| Lovex S070ᴾ | <<locked>> | 100% | 54,708 psi | 90% | 2713 fps | 98.1% |
| Norma 201 | <<locked>> | 88% | 53,737 psi | 88% | 2654 fps | 100% |
| Norma 202 | <<locked>> | 88% | 54,012 psi | 89% | 2651 fps | 100% |
| Norma 203B | <<locked>> | 90% | 51,982 psi | 85% | 2684 fps | 99.9% |
| Norma 204ᴾ | <<locked>> | 100% | 53,417 psi | 88% | 2726 fps | 95.8% |
| Norma URPᴾ | <<locked>> | 100% | 52,373 psi | 86% | 2736 fps | 99.5% |
| Ramshot Big Game | <<locked>> | 90% | 52,301 psi | 86% | 2707 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 51,300 psi | 84% | 2730 fps | 98.2% |
| Ramshot TAC | <<locked>> | 86% | 54,186 psi | 89% | 2677 fps | 99% |
| Ramshot Wild Boar | <<locked>> | 86% | 53,563 psi | 88% | 2694 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 84% | 54,824 psi | 90% | 2661 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,752 psi | 59% | 1654 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 53,403 psi | 88% | 2638 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 54,056 psi | 89% | 2684 fps | 98.3% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 52,881 psi | 87% | 2756 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 52,417 psi | 86% | 2792 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 52,808 psi | 87% | 2772 fps | 99.4% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 52,982 psi | 87% | 2795 fps | 99.3% |
| Rottweil R 901 | <<locked>> | 86% | 54,752 psi | 90% | 2635 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 54,056 psi | 89% | 2648 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 52,272 psi | 86% | 2680 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 52,953 psi | 87% | 2657 fps | 97% |
| Shooters World Long Rifle | <<locked>> | 98% | 54,157 psi | 89% | 2684 fps | 98.8% |
| Shooters World Match Rifle | <<locked>> | 88% | 54,404 psi | 89% | 2680 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 54,940 psi | 90% | 2680 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 54,708 psi | 90% | 2713 fps | 98.1% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 53,998 psi | 89% | 2740 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 52,388 psi | 86% | 2651 fps | 99.1% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 53,171 psi | 87% | 2677 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 52,098 psi | 86% | 2549 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 52,025 psi | 85% | 2549 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 54,578 psi | 90% | 2638 fps | 97.8% |
| Somchem S321 | <<locked>> | 84% | 55,056 psi | 90% | 2690 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 54,737 psi | 90% | 2592 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 52,141 psi | 86% | 2648 fps | 99.9% |
| Somchem S355 | <<locked>> | 94% | 52,881 psi | 87% | 2680 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 46,963 psi | 77% | 2690 fps | 100% |
| Vihtavuori N130 | <<locked>> | 82% | 51,938 psi | 85% | 2516 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 52,286 psi | 86% | 2536 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 53,708 psi | 88% | 2615 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 54,505 psi | 89% | 2631 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 54,215 psi | 89% | 2657 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 55,114 psi | 90% | 2733 fps | 99.6% |
| Vihtavuori N530 | <<locked>> | 86% | 54,360 psi | 89% | 2654 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 52,736 psi | 87% | 2631 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 54,157 psi | 89% | 2743 fps | 99.5% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 39,479 psi | 65% | 2572 fps | 98.2% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 52,112 psi | 86% | 2667 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 54,027 psi | 89% | 2700 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 52,852 psi | 87% | 2746 fps | 97.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 32,663 psi | 54% | 2490 fps | 97.8% |
| Winchester StaBALL Match | <<locked>> | 88% | 53,011 psi | 87% | 2687 fps | 100% |
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% | 46,456 psi | 76% | 2477 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 50,792 psi | 83% | 2585 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 39,073 psi | 64% | 2408 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 45,745 psi | 75% | 2549 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 47,137 psi | 77% | 2523 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 36,912 psi | 61% | 2402 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 32,851 psi | 54% | 2382 fps | 95.4% |
| ADI AR 2206H | <<locked>> | 80% | 42,670 psi | 70% | 2507 fps | 99% |
| ADI AR 2208 | <<locked>> | 80% | 36,332 psi | 60% | 2369 fps | 97.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,715 psi | 73% | 2513 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 80% | 44,730 psi | 73% | 2503 fps | 100% |
| Alliant Power Pro 2000-MR | 68.9 gr | 80% | 38,580 psi | 63% | 2530 fps | 97.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,868 psi | 59% | 2392 fps | 98.5% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,479 psi | 63% | 2448 fps | 97.8% |
| Alliant Reloder-16 | <<locked>> | 86% | 33,678 psi | 55% | 2395 fps | 95.6% |
| Alliant Reloder-17 | 67.9 gr | 80% | 30,893 psi | 51% | 2356 fps | 96.4% |
| Alliant Reloder-23 | <<locked>> | 92% | 28,790 psi | 47% | 2300 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 96% | 35,360 psi | 58% | 2523 fps | 95.4% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 41,829 psi | 69% | 2513 fps | 98.1% |
| Bofors RP3 | <<locked>> | 80% | 35,273 psi | 58% | 2392 fps | 98.4% |
| Bofors RP7 | <<locked>> | 90% | 44,077 psi | 72% | 2510 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,514 psi | 76% | 2503 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 43,265 psi | 71% | 2536 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 47,776 psi | 78% | 2671 fps | 99.4% |
| Hodgdon H322 | <<locked>> | 80% | 51,285 psi | 84% | 2605 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 36,187 psi | 59% | 2392 fps | 95.9% |
| Hodgdon H414 | <<locked>> | 92% | 43,352 psi | 71% | 2589 fps | 95.7% |
| Hodgdon H4350 | <<locked>> | 92% | 47,355 psi | 78% | 2605 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 43,076 psi | 71% | 2520 fps | 99.4% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 28,819 psi | 47% | 2247 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,914 psi | 64% | 2490 fps | 99.2% |
| Hodgdon Superformance | <<locked>> | 94% | 46,485 psi | 76% | 2661 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,252 psi | 43% | 1444 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,379 psi | 68% | 2474 fps | 99.1% |
| IMR 3031 | <<locked>> | 80% | 42,511 psi | 70% | 2513 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,116 psi | 63% | 2398 fps | 97.8% |
| IMR 4166 Enduron | <<locked>> | 82% | 43,337 psi | 71% | 2467 fps | 95.4% |
| IMR 4350 | <<locked>> | 94% | 43,918 psi | 72% | 2533 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 88% | 43,033 psi | 71% | 2493 fps | 95.2% |
| IMR 4831 | <<locked>> | 86% | 31,952 psi | 52% | 2343 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 39,407 psi | 65% | 2474 fps | 98.6% |
| IMR 8208 XBR | <<locked>> | 80% | 44,715 psi | 73% | 2513 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 80% | 50,459 psi | 83% | 2595 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 41,640 psi | 68% | 2490 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 43,047 psi | 71% | 2451 fps | 99.1% |
| Lovex S062 | <<locked>> | 80% | 38,072 psi | 63% | 2405 fps | 99.2% |
| Lovex S065 | <<locked>> | 86% | 37,579 psi | 62% | 2395 fps | 95.3% |
| Lovex S070 | <<locked>> | 92% | 42,714 psi | 70% | 2516 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 41,887 psi | 69% | 2464 fps | 99.6% |
| Norma 202 | <<locked>> | 80% | 42,134 psi | 69% | 2474 fps | 100% |
| Norma 203B | <<locked>> | 80% | 37,855 psi | 62% | 2438 fps | 98.2% |
| Norma 204 | <<locked>> | 98% | 50,067 psi | 82% | 2674 fps | 95% |
| Norma URP | <<locked>> | 86% | 33,417 psi | 55% | 2385 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 37,202 psi | 61% | 2448 fps | 97.9% |
| Ramshot Hunter | <<locked>> | 92% | 39,769 psi | 65% | 2526 fps | 95.5% |
| Ramshot TAC | <<locked>> | 80% | 44,657 psi | 73% | 2520 fps | 97.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 44,063 psi | 72% | 2539 fps | 99.2% |
| Ramshot X-Terminator | <<locked>> | 80% | 48,327 psi | 79% | 2562 fps | 99.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,527 psi | 44% | 1476 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 50,169 psi | 82% | 2592 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 41,843 psi | 69% | 2480 fps | 95.8% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 40,059 psi | 66% | 2539 fps | 98.2% |
| ReloadSwiss RS 60 | 67.9 gr | 80% | 32,866 psi | 54% | 2418 fps | 99.2% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 35,027 psi | 57% | 2451 fps | 95.8% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 37,942 psi | 62% | 2513 fps | 95.8% |
| Rottweil R 901 | <<locked>> | 80% | 45,876 psi | 75% | 2503 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 39,871 psi | 65% | 2421 fps | 99.4% |
| Rottweil R 903 | <<locked>> | 80% | 33,185 psi | 54% | 2339 fps | 97.6% |
| Rottweil R 907 | <<locked>> | 90% | 44,077 psi | 72% | 2510 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 86% | 37,579 psi | 62% | 2395 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 41,640 psi | 68% | 2490 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 38,072 psi | 63% | 2405 fps | 99.2% |
| Shooters World SW4350 | <<locked>> | 92% | 42,714 psi | 70% | 2516 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,156 psi | 56% | 2385 fps | 97.1% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 42,772 psi | 70% | 2493 fps | 97.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,133 psi | 68% | 2477 fps | 98.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,323 psi | 71% | 2418 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,940 psi | 59% | 2297 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 41,945 psi | 69% | 2441 fps | 95.1% |
| Somchem S321 | <<locked>> | 80% | 48,356 psi | 79% | 2592 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 42,873 psi | 70% | 2421 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 42,641 psi | 70% | 2493 fps | 99% |
| Somchem S355 | <<locked>> | 80% | 34,185 psi | 56% | 2346 fps | 97.7% |
| Somchem S365 | <<locked>> | 82% | 26,353 psi | 43% | 2234 fps | 95.9% |
| Vihtavuori N130 | <<locked>> | 80% | 48,979 psi | 80% | 2474 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 43,584 psi | 72% | 2415 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 39,175 psi | 64% | 2402 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,827 psi | 65% | 2411 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,430 psi | 53% | 2287 fps | 98.4% |
| Vihtavuori N160 | <<locked>> | 84% | 32,866 psi | 54% | 2336 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 44,759 psi | 73% | 2513 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 80% | 38,276 psi | 63% | 2402 fps | 100% |
| Vihtavuori N550 | <<locked>> | 86% | 34,360 psi | 56% | 2388 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 92% | 30,647 psi | 50% | 2372 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 28,950 psi | 48% | 2215 fps | 95.6% |
| Winchester 748 | <<locked>> | 80% | 44,280 psi | 73% | 2556 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 43,526 psi | 71% | 2592 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 96% | 28,848 psi | 47% | 2369 fps | 95.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 40,480 psi | 66% | 2480 fps | 99.1% |
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 99 powders for .375 Blaser Mag. loaded with the .375 | 270gr | Hammer Shock Hammer. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,818 fps; across all powders the maximum-charge window runs from 1,617 fps to 2,818 fps. Accurate 4350 gives the best case fill at 100 %, and 99 of the 99 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (420 MPa), the top charges use 54–90 %, leaving at least 10 % headroom. The 270.0 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 Reloder-17, ReloadSwiss RS 60, Alliant Power Pro 2000-MR rank at the top here: for .375 Blaser Mag. with the .375 | 270gr | Hammer Shock Hammer 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.