Load Specifications
Load data in caliber .375 Blaser Mag. with .375 | 270gr | Alaska Bullet Works Kodiak PP SPBC bullet and 98 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 ReloadSwiss RS 70.
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% | 52,663 psi | 86% | 2589 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 54,592 psi | 90% | 2654 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 54,708 psi | 90% | 2710 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 54,708 psi | 90% | 2710 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 54,679 psi | 90% | 2667 fps | 97.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 41,568 psi | 68% | 2566 fps | 96.8% |
| Accurate 4064 | <<locked>> | 90% | 54,621 psi | 90% | 2703 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 54,346 psi | 89% | 2792 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 86% | 55,056 psi | 90% | 2736 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 52,605 psi | 86% | 2687 fps | 99.9% |
| ADI Benchmark 8208 | <<locked>> | 84% | 53,911 psi | 89% | 2684 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 54,839 psi | 90% | 2657 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 54,636 psi | 90% | 2854 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 52,779 psi | 87% | 2710 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 53,185 psi | 87% | 2730 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 98% | 52,214 psi | 86% | 2795 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 94% | 53,171 psi | 87% | 2828 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 39,697 psi | 65% | 2598 fps | 99.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 44,367 psi | 73% | 2756 fps | 98.8% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 54,650 psi | 90% | 2753 fps | 99.9% |
| Bofors RP3 | <<locked>> | 90% | 53,156 psi | 87% | 2726 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 53,301 psi | 88% | 2697 fps | 97.6% |
| Hodgdon Benchmark | <<locked>> | 82% | 52,402 psi | 86% | 2621 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 53,330 psi | 88% | 2717 fps | 100% |
| Hodgdon H322 | <<locked>> | 82% | 53,940 psi | 89% | 2664 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 54,027 psi | 89% | 2736 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 92% | 51,590 psi | 85% | 2756 fps | 98% |
| Hodgdon H4350 | <<locked>> | 96% | 52,417 psi | 86% | 2723 fps | 96.9% |
| Hodgdon H4895 | <<locked>> | 84% | 52,127 psi | 86% | 2694 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 51,822 psi | 85% | 2723 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 54,969 psi | 90% | 2779 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 54,070 psi | 89% | 2825 fps | 98.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,679 psi | 59% | 1654 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 52,344 psi | 86% | 2684 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 54,085 psi | 89% | 2703 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 54,636 psi | 90% | 2707 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 92% | 54,186 psi | 89% | 2684 fps | 98.2% |
| IMR 4350 | <<locked>> | 98% | 53,461 psi | 88% | 2723 fps | 97.7% |
| IMR 4451 Enduron | <<locked>> | 94% | 55,085 psi | 90% | 2726 fps | 98.3% |
| IMR 4831ᴾ | <<locked>> | 100% | 48,704 psi | 80% | 2690 fps | 99.5% |
| IMR 4895 | <<locked>> | 88% | 54,549 psi | 90% | 2759 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 53,911 psi | 89% | 2684 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 54,708 psi | 90% | 2710 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 54,462 psi | 89% | 2664 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 52,025 psi | 85% | 2667 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 54,462 psi | 89% | 2720 fps | 99.2% |
| Lovex S070 | <<locked>> | 96% | 52,040 psi | 85% | 2707 fps | 98.2% |
| Norma 201 | <<locked>> | 86% | 53,693 psi | 88% | 2680 fps | 100% |
| Norma 202 | <<locked>> | 86% | 54,201 psi | 89% | 2680 fps | 100% |
| Norma 203B | <<locked>> | 88% | 52,446 psi | 86% | 2717 fps | 100% |
| Norma 204 | <<locked>> | 98% | 54,070 psi | 89% | 2769 fps | 96.6% |
| Norma MRPᴾ | <<locked>> | 100% | 44,382 psi | 73% | 2713 fps | 96.3% |
| Norma URP | <<locked>> | 98% | 53,447 psi | 88% | 2779 fps | 99.8% |
| Ramshot Big Game | <<locked>> | 88% | 52,779 psi | 87% | 2743 fps | 100% |
| Ramshot Hunter | <<locked>> | 98% | 52,214 psi | 86% | 2776 fps | 98.8% |
| Ramshot TAC | <<locked>> | 84% | 54,114 psi | 89% | 2707 fps | 99.3% |
| Ramshot Wild Boar | <<locked>> | 84% | 53,780 psi | 88% | 2723 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 54,781 psi | 90% | 2690 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,071 psi | 59% | 1690 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 54,360 psi | 89% | 2720 fps | 98.8% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 53,519 psi | 88% | 2792 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 52,982 psi | 87% | 2828 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 54,027 psi | 89% | 2815 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 53,476 psi | 88% | 2838 fps | 99.6% |
| Rottweil R 901 | <<locked>> | 84% | 54,839 psi | 90% | 2661 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 54,375 psi | 89% | 2680 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 53,040 psi | 87% | 2717 fps | 100% |
| Rottweil R 907 | <<locked>> | 94% | 53,301 psi | 88% | 2697 fps | 97.6% |
| Shooters World Long Rifle | <<locked>> | 96% | 54,462 psi | 89% | 2720 fps | 99.2% |
| Shooters World Match Rifle | <<locked>> | 86% | 54,708 psi | 90% | 2710 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 52,025 psi | 85% | 2667 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 52,040 psi | 85% | 2707 fps | 98.2% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 54,737 psi | 90% | 2776 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 52,518 psi | 86% | 2684 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 53,403 psi | 88% | 2710 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 52,069 psi | 85% | 2575 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 52,199 psi | 86% | 2579 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 54,723 psi | 90% | 2674 fps | 98.3% |
| Somchem S335 | <<locked>> | 86% | 54,578 psi | 90% | 2618 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 52,243 psi | 86% | 2677 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 53,359 psi | 88% | 2713 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 51,198 psi | 84% | 2779 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 47,776 psi | 78% | 2667 fps | 96.6% |
| Unknown powder | <<locked>> | 96% | 54,389 psi | 89% | 2785 fps | 99.6% |
| Vihtavuori N130 | <<locked>> | 82% | 54,998 psi | 90% | 2579 fps | 100% |
| Vihtavuori N133 | <<locked>> | 84% | 52,373 psi | 86% | 2562 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 53,969 psi | 89% | 2641 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 54,897 psi | 90% | 2661 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 54,679 psi | 90% | 2694 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 52,315 psi | 86% | 2723 fps | 99.6% |
| Vihtavuori N530 | <<locked>> | 84% | 54,404 psi | 89% | 2684 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 53,011 psi | 87% | 2661 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 54,839 psi | 90% | 2779 fps | 99.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 43,598 psi | 72% | 2671 fps | 99.3% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 52,504 psi | 86% | 2703 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 54,940 psi | 90% | 2740 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 51,590 psi | 85% | 2756 fps | 98% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 35,505 psi | 58% | 2605 fps | 99.4% |
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% | 49,414 psi | 81% | 2543 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 42,134 psi | 69% | 2477 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 47,659 psi | 78% | 2612 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 47,659 psi | 78% | 2612 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 45,092 psi | 74% | 2516 fps | 95.6% |
| Accurate 3100 | <<locked>> | 96% | 36,201 psi | 59% | 2461 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 39,856 psi | 65% | 2477 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 31,372 psi | 52% | 2365 fps | 95.3% |
| ADI AR 2206H | <<locked>> | 80% | 45,701 psi | 75% | 2589 fps | 99.6% |
| ADI AR 2208 | <<locked>> | 80% | 38,769 psi | 64% | 2444 fps | 98.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 47,732 psi | 78% | 2592 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 48,211 psi | 79% | 2569 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 41,524 psi | 68% | 2625 fps | 98.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 38,479 psi | 63% | 2467 fps | 99.3% |
| Alliant Reloder-15 | <<locked>> | 80% | 41,350 psi | 68% | 2530 fps | 98.8% |
| Alliant Reloder-16 | <<locked>> | 82% | 31,821 psi | 52% | 2375 fps | 95.4% |
| Alliant Reloder-17 | 72.9 gr | 80% | 33,272 psi | 55% | 2444 fps | 97.9% |
| Alliant Reloder-23 | <<locked>> | 88% | 27,543 psi | 45% | 2290 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 92% | 33,678 psi | 55% | 2513 fps | 95.4% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 44,744 psi | 73% | 2592 fps | 99% |
| Bofors RP3 | <<locked>> | 80% | 38,145 psi | 63% | 2470 fps | 99.3% |
| Bofors RP7 | <<locked>> | 88% | 44,280 psi | 73% | 2546 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 80% | 49,356 psi | 81% | 2575 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 46,615 psi | 77% | 2615 fps | 100% |
| Hodgdon H322 | <<locked>> | 80% | 50,647 psi | 83% | 2618 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 39,015 psi | 64% | 2477 fps | 97.2% |
| Hodgdon H414 | <<locked>> | 84% | 39,218 psi | 64% | 2533 fps | 95% |
| Hodgdon H4350 | <<locked>> | 92% | 46,354 psi | 76% | 2621 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 46,108 psi | 76% | 2598 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 27,427 psi | 45% | 2231 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 39,668 psi | 65% | 2530 fps | 99.5% |
| Hodgdon Superformance | <<locked>> | 90% | 43,642 psi | 72% | 2644 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,527 psi | 44% | 1473 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,944 psi | 67% | 2493 fps | 99.4% |
| IMR 3031 | <<locked>> | 80% | 42,018 psi | 69% | 2526 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,058 psi | 62% | 2421 fps | 98.2% |
| IMR 4166 Enduron | <<locked>> | 82% | 40,277 psi | 66% | 2441 fps | 95.1% |
| IMR 4350 | <<locked>> | 90% | 41,727 psi | 69% | 2523 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 84% | 40,712 psi | 67% | 2477 fps | 95.2% |
| IMR 4831 | <<locked>> | 86% | 31,459 psi | 52% | 2349 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 42,380 psi | 70% | 2559 fps | 99.3% |
| IMR 8208 XBR | <<locked>> | 80% | 47,732 psi | 78% | 2592 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 44,904 psi | 74% | 2566 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 45,585 psi | 75% | 2523 fps | 99.6% |
| Lovex S062 | <<locked>> | 80% | 40,741 psi | 67% | 2480 fps | 99.7% |
| Lovex S065 | <<locked>> | 82% | 35,534 psi | 58% | 2379 fps | 95.2% |
| Lovex S070 | <<locked>> | 88% | 40,683 psi | 67% | 2507 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 44,614 psi | 73% | 2539 fps | 99.9% |
| Norma 202 | <<locked>> | 80% | 44,962 psi | 74% | 2543 fps | 100% |
| Norma 203B | <<locked>> | 80% | 40,741 psi | 67% | 2520 fps | 99.1% |
| Norma 204 | <<locked>> | 94% | 47,297 psi | 78% | 2661 fps | 95% |
| Norma MRP | <<locked>> | 98% | 41,539 psi | 68% | 2654 fps | 95.4% |
| Norma URP | <<locked>> | 82% | 31,792 psi | 52% | 2369 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 40,234 psi | 66% | 2533 fps | 98.9% |
| Ramshot Hunter | <<locked>> | 88% | 37,710 psi | 62% | 2510 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 47,572 psi | 78% | 2602 fps | 98.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 47,079 psi | 77% | 2621 fps | 99.7% |
| Ramshot X-Terminator | <<locked>> | 80% | 51,300 psi | 84% | 2638 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,977 psi | 44% | 1512 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 39,262 psi | 64% | 2457 fps | 95.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 43,540 psi | 71% | 2628 fps | 99.2% |
| ReloadSwiss RS 60 | 72.9 gr | 80% | 35,404 psi | 58% | 2507 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 33,330 psi | 55% | 2434 fps | 95.7% |
| ReloadSwiss RS 70 | 79.5 gr | 86% | 35,679 psi | 59% | 2493 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 80% | 48,762 psi | 80% | 2572 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 42,583 psi | 70% | 2497 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 80% | 35,940 psi | 59% | 2421 fps | 98.7% |
| Rottweil R 907 | <<locked>> | 88% | 44,280 psi | 73% | 2546 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 82% | 35,534 psi | 58% | 2379 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 44,904 psi | 74% | 2566 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 40,741 psi | 67% | 2480 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 88% | 40,683 psi | 67% | 2507 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,796 psi | 60% | 2467 fps | 98.2% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 45,876 psi | 75% | 2579 fps | 98.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 44,034 psi | 72% | 2559 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 46,035 psi | 76% | 2490 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 38,348 psi | 63% | 2365 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 39,566 psi | 65% | 2425 fps | 95% |
| Somchem S335 | <<locked>> | 80% | 45,527 psi | 75% | 2487 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 45,542 psi | 75% | 2572 fps | 99.6% |
| Somchem S355 | <<locked>> | 80% | 36,680 psi | 60% | 2425 fps | 98.7% |
| Somchem S365 | <<locked>> | 80% | 26,760 psi | 44% | 2270 fps | 96.7% |
| Somchem S385 | <<locked>> | 96% | 41,930 psi | 69% | 2566 fps | 95% |
| Unknown powder | <<locked>> | 82% | 34,592 psi | 57% | 2421 fps | 95.6% |
| Vihtavuori N130 | <<locked>> | 80% | 51,851 psi | 85% | 2539 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 46,369 psi | 76% | 2480 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 42,148 psi | 69% | 2474 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 42,612 psi | 70% | 2484 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 34,911 psi | 57% | 2362 fps | 99.2% |
| Vihtavuori N160 | <<locked>> | 82% | 33,214 psi | 55% | 2369 fps | 95.8% |
| Vihtavuori N530 | <<locked>> | 80% | 47,776 psi | 78% | 2589 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 41,089 psi | 67% | 2477 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 32,619 psi | 54% | 2369 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 88% | 29,501 psi | 48% | 2362 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,879 psi | 51% | 2297 fps | 97.1% |
| Winchester 748 | <<locked>> | 80% | 51,213 psi | 84% | 2687 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 39,218 psi | 64% | 2533 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 92% | 27,586 psi | 45% | 2362 fps | 95.6% |
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 98 powders for .375 Blaser Mag. loaded with the .375 | 270gr | Alaska Bullet Works Kodiak PP SPBC. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,854 fps; across all powders the maximum-charge window runs from 1,654 fps to 2,854 fps. Accurate 3100 gives the best case fill at 100 %, and 98 of the 98 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (420 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 270.0 gr projectile in 0.375" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-23, Alliant Reloder-26 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, ReloadSwiss RS 70 rank at the top here: for .375 Blaser Mag. with the .375 | 270gr | Alaska Bullet Works Kodiak PP SPBC 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.