Load Specifications
Bullet:.375 | 250gr | Hornady GMX
Bullet Manufacturer:Hornady
Bullet Weight:250 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:1:14.5
Load data in caliber .375 Blaser Mag. with .375 | 250gr | Hornady GMX bullet and 101 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, ReloadSwiss RS 60 and ReloadSwiss RS 52.
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>> | 88% | 53,563 psi | 88% | 2680 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 51,880 psi | 85% | 2703 fps | 100% |
| Accurate 2495 | <<locked>> | 94% | 54,070 psi | 89% | 2740 fps | 100% |
| Accurate 2520 | <<locked>> | 88% | 53,679 psi | 88% | 2766 fps | 100% |
| Accurate 4064 | <<locked>> | 96% | 53,998 psi | 89% | 2782 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 46,296 psi | 76% | 2740 fps | 98.1% |
| Accurate LT-30 | <<locked>> | 82% | 53,577 psi | 88% | 2628 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 54,027 psi | 89% | 2654 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 52,837 psi | 87% | 2772 fps | 99.6% |
| ADI AR 2208 | <<locked>> | 96% | 53,824 psi | 88% | 2769 fps | 99.4% |
| ADI AR 2219 | <<locked>> | 82% | 54,056 psi | 89% | 2746 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 88% | 52,228 psi | 86% | 2730 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 88% | 51,924 psi | 85% | 2710 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 53,563 psi | 88% | 2831 fps | 99.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 52,127 psi | 86% | 2877 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 53,040 psi | 87% | 2789 fps | 99.9% |
| Alliant Reloder-10x | <<locked>> | 84% | 53,490 psi | 88% | 2687 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 53,766 psi | 88% | 2808 fps | 99.5% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 46,195 psi | 76% | 2749 fps | 98.2% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 53,635 psi | 88% | 2904 fps | 99.9% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 52,750 psi | 87% | 2628 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 52,489 psi | 86% | 2785 fps | 99% |
| Bofors RP3 | <<locked>> | 96% | 53,098 psi | 87% | 2799 fps | 99.9% |
| Bofors RP7ᴾ | <<locked>> | 100% | 54,114 psi | 89% | 2762 fps | 96.1% |
| Hodgdon Benchmark | <<locked>> | 88% | 54,317 psi | 89% | 2717 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 90% | 54,288 psi | 89% | 2808 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 52,446 psi | 86% | 2848 fps | 99.4% |
| Hodgdon H322 | <<locked>> | 84% | 52,736 psi | 87% | 2730 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 53,867 psi | 88% | 2756 fps | 100% |
| Hodgdon H380 | <<locked>> | 96% | 54,940 psi | 90% | 2815 fps | 98.8% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 50,212 psi | 82% | 2795 fps | 96.2% |
| Hodgdon H4895 | <<locked>> | 90% | 53,345 psi | 88% | 2785 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 42,279 psi | 69% | 2635 fps | 98.7% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 51,953 psi | 85% | 2812 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,548 psi | 57% | 1663 fps | 100% |
| Hodgdon VARGET | <<locked>> | 92% | 54,810 psi | 90% | 2789 fps | 99.9% |
| IMR 3031 | <<locked>> | 90% | 52,663 psi | 86% | 2772 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 53,200 psi | 87% | 2749 fps | 99.4% |
| IMR 4166 Enduron | <<locked>> | 92% | 54,099 psi | 89% | 2733 fps | 96.7% |
| IMR 4198 | <<locked>> | 84% | 54,157 psi | 89% | 2651 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 53,127 psi | 87% | 2749 fps | 96.5% |
| IMR 4831ᴾ | <<locked>> | 100% | 44,338 psi | 73% | 2687 fps | 97.7% |
| IMR 4895 | <<locked>> | 92% | 51,677 psi | 85% | 2789 fps | 99.6% |
| IMR 8208 XBR | <<locked>> | 88% | 52,228 psi | 86% | 2730 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 84% | 51,953 psi | 85% | 2713 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 51,605 psi | 85% | 2746 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 53,098 psi | 87% | 2707 fps | 99.6% |
| Lovex S062 | <<locked>> | 94% | 52,591 psi | 86% | 2749 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 51,692 psi | 85% | 2740 fps | 97.7% |
| Lovex S070ᴾ | <<locked>> | 100% | 48,892 psi | 80% | 2713 fps | 96% |
| Norma 201 | <<locked>> | 92% | 54,839 psi | 90% | 2769 fps | 100% |
| Norma 202 | <<locked>> | 90% | 51,909 psi | 85% | 2726 fps | 100% |
| Norma 203B | <<locked>> | 94% | 52,881 psi | 87% | 2795 fps | 99.7% |
| Norma URPᴾ | <<locked>> | 100% | 46,340 psi | 76% | 2736 fps | 97.9% |
| Ramshot Big Game | <<locked>> | 94% | 53,432 psi | 88% | 2825 fps | 99.6% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 45,803 psi | 75% | 2726 fps | 96% |
| Ramshot TAC | <<locked>> | 88% | 52,547 psi | 86% | 2743 fps | 98% |
| Ramshot Wild Boar | <<locked>> | 88% | 51,779 psi | 85% | 2762 fps | 99.5% |
| Ramshot X-Terminator | <<locked>> | 86% | 53,374 psi | 88% | 2733 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,795 psi | 57% | 1703 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 51,793 psi | 85% | 2713 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 51,996 psi | 85% | 2743 fps | 97% |
| ReloadSwiss RS 52 | <<locked>> | 92% | 53,780 psi | 88% | 2871 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 53,519 psi | 88% | 2907 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 46,166 psi | 76% | 2762 fps | 97.8% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 47,427 psi | 78% | 2785 fps | 97.3% |
| Rottweil R 901 | <<locked>> | 88% | 52,402 psi | 86% | 2707 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 51,721 psi | 85% | 2717 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 98% | 52,953 psi | 87% | 2792 fps | 99.9% |
| Rottweil R 907ᴾ | <<locked>> | 100% | 54,114 psi | 89% | 2762 fps | 96.1% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 51,692 psi | 85% | 2740 fps | 97.7% |
| Shooters World Match Rifle | <<locked>> | 90% | 51,605 psi | 85% | 2746 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 52,591 psi | 86% | 2749 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 48,892 psi | 80% | 2713 fps | 96% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 55,100 psi | 90% | 2733 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 54,505 psi | 89% | 2759 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 54,984 psi | 90% | 2851 fps | 99.8% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 54,766 psi | 90% | 2710 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 90% | 54,143 psi | 89% | 2772 fps | 98.6% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 54,607 psi | 90% | 2795 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 53,708 psi | 88% | 2671 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 53,388 psi | 88% | 2667 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 52,301 psi | 86% | 2694 fps | 96.3% |
| Somchem S321 | <<locked>> | 86% | 53,229 psi | 87% | 2766 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 52,649 psi | 86% | 2667 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 53,664 psi | 88% | 2762 fps | 99.6% |
| Somchem S355 | <<locked>> | 98% | 53,534 psi | 88% | 2789 fps | 99.8% |
| Somchem S365ᴾ | <<locked>> | 100% | 41,263 psi | 68% | 2687 fps | 99.5% |
| Vihtavuori N130 | <<locked>> | 86% | 53,606 psi | 88% | 2641 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 53,766 psi | 88% | 2657 fps | 100% |
| Vihtavuori N135 | <<locked>> | 94% | 54,375 psi | 89% | 2733 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 52,518 psi | 86% | 2707 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 51,880 psi | 85% | 2726 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 48,994 psi | 80% | 2740 fps | 98.3% |
| Vihtavuori N530 | <<locked>> | 88% | 52,533 psi | 86% | 2730 fps | 100% |
| Vihtavuori N540 | <<locked>> | 94% | 53,824 psi | 88% | 2749 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 47,892 psi | 79% | 2743 fps | 98% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 50,111 psi | 82% | 2726 fps | 99.7% |
| Winchester 748 | <<locked>> | 88% | 51,764 psi | 85% | 2772 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 50,212 psi | 82% | 2795 fps | 96.2% |
| Winchester StaBALL Match | <<locked>> | 92% | 54,317 psi | 89% | 2805 fps | 99.9% |
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% | 41,713 psi | 68% | 2503 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 45,310 psi | 74% | 2605 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 33,808 psi | 56% | 2411 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 40,567 psi | 67% | 2559 fps | 99.8% |
| Accurate 4064 | <<locked>> | 80% | 31,981 psi | 53% | 2398 fps | 99.2% |
| Accurate 4350 | <<locked>> | 94% | 37,260 psi | 61% | 2572 fps | 95.8% |
| Accurate LT-30 | <<locked>> | 80% | 50,444 psi | 83% | 2585 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 50,821 psi | 83% | 2608 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 38,276 psi | 63% | 2513 fps | 97.3% |
| ADI AR 2208 | <<locked>> | 82% | 34,766 psi | 57% | 2418 fps | 95.4% |
| ADI AR 2219 | <<locked>> | 80% | 50,604 psi | 83% | 2697 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 40,350 psi | 66% | 2530 fps | 98.8% |
| Alliant AR-Comp | <<locked>> | 80% | 39,581 psi | 65% | 2530 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 46,804 psi | 77% | 2723 fps | 99.4% |
| Alliant Power Pro 2000-MR | 69.3 gr | 82% | 37,057 psi | 61% | 2579 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 31,604 psi | 52% | 2385 fps | 96.3% |
| Alliant Reloder-10x | <<locked>> | 80% | 47,239 psi | 78% | 2598 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 34,142 psi | 56% | 2444 fps | 95.5% |
| Alliant Reloder-16 | <<locked>> | 92% | 36,027 psi | 59% | 2533 fps | 95.1% |
| Alliant Reloder-17 | <<locked>> | 84% | 31,270 psi | 51% | 2444 fps | 95.1% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 49,458 psi | 81% | 2585 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 37,347 psi | 61% | 2513 fps | 95.9% |
| Bofors RP3 | <<locked>> | 80% | 30,705 psi | 50% | 2379 fps | 96.1% |
| Bofors RP7 | <<locked>> | 98% | 50,937 psi | 84% | 2713 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 42,525 psi | 70% | 2530 fps | 99.5% |
| Hodgdon BL-C2 | <<locked>> | 80% | 38,522 psi | 63% | 2543 fps | 99% |
| Hodgdon CFE223 | <<locked>> | 80% | 42,496 psi | 70% | 2674 fps | 97.9% |
| Hodgdon H322 | <<locked>> | 80% | 46,296 psi | 76% | 2635 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 46,978 psi | 77% | 2654 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 39,247 psi | 64% | 2546 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 98% | 46,833 psi | 77% | 2740 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 38,537 psi | 63% | 2523 fps | 97.9% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 30,734 psi | 50% | 2379 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 34,606 psi | 57% | 2490 fps | 97.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,657 psi | 42% | 1486 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 37,231 psi | 61% | 2480 fps | 97.5% |
| IMR 3031 | <<locked>> | 80% | 37,652 psi | 62% | 2530 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 34,243 psi | 56% | 2402 fps | 95.6% |
| IMR 4166 Enduron | <<locked>> | 88% | 47,659 psi | 78% | 2628 fps | 95.3% |
| IMR 4198 | <<locked>> | 80% | 48,182 psi | 79% | 2569 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 94% | 46,862 psi | 77% | 2648 fps | 95% |
| IMR 4831 | <<locked>> | 94% | 36,187 psi | 59% | 2526 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 34,925 psi | 57% | 2474 fps | 96.5% |
| IMR 8208 XBR | <<locked>> | 80% | 40,350 psi | 66% | 2530 fps | 98.8% |
| Lovex D073.5 | <<locked>> | 80% | 45,005 psi | 74% | 2608 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 36,637 psi | 60% | 2493 fps | 99.3% |
| Lovex S060 | <<locked>> | 80% | 39,088 psi | 64% | 2464 fps | 97.5% |
| Lovex S062 | <<locked>> | 80% | 33,736 psi | 55% | 2405 fps | 97.4% |
| Lovex S065 | <<locked>> | 94% | 42,815 psi | 70% | 2585 fps | 95.7% |
| Lovex S070 | <<locked>> | 98% | 45,977 psi | 75% | 2664 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 37,492 psi | 62% | 2470 fps | 98.3% |
| Norma 202 | <<locked>> | 80% | 37,594 psi | 62% | 2487 fps | 99.7% |
| Norma 203B | <<locked>> | 80% | 33,533 psi | 55% | 2431 fps | 95.9% |
| Norma URP | <<locked>> | 92% | 35,810 psi | 59% | 2526 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 33,112 psi | 54% | 2441 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 98% | 42,801 psi | 70% | 2667 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 40,306 psi | 66% | 2526 fps | 95.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 39,450 psi | 65% | 2546 fps | 97.6% |
| Ramshot X-Terminator | <<locked>> | 80% | 43,801 psi | 72% | 2575 fps | 98.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,802 psi | 42% | 1522 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 45,484 psi | 75% | 2615 fps | 99.9% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 45,556 psi | 75% | 2635 fps | 95.6% |
| ReloadSwiss RS 52 | 65.5 gr | 80% | 35,317 psi | 58% | 2533 fps | 95.9% |
| ReloadSwiss RS 60 | 66.5 gr | 80% | 29,109 psi | 48% | 2395 fps | 96.8% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 37,507 psi | 62% | 2592 fps | 95.4% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 41,321 psi | 68% | 2664 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 41,104 psi | 67% | 2523 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 80% | 35,621 psi | 58% | 2425 fps | 97.9% |
| Rottweil R 903 | <<locked>> | 82% | 30,922 psi | 51% | 2375 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 98% | 50,937 psi | 84% | 2713 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 94% | 42,815 psi | 70% | 2585 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 36,637 psi | 60% | 2493 fps | 99.3% |
| Shooters World Precision | <<locked>> | 80% | 33,736 psi | 55% | 2405 fps | 97.4% |
| Shooters World SW4350 | <<locked>> | 98% | 45,977 psi | 75% | 2664 fps | 95.3% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 48,138 psi | 79% | 2631 fps | 99.6% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 50,952 psi | 84% | 2710 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 32,314 psi | 53% | 2425 fps | 95.2% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 48,269 psi | 79% | 2621 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 38,029 psi | 62% | 2490 fps | 95.1% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 36,912 psi | 61% | 2484 fps | 96.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 39,247 psi | 64% | 2441 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 32,169 psi | 53% | 2310 fps | 99.5% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 48,791 psi | 80% | 2641 fps | 95.6% |
| Somchem S321 | <<locked>> | 80% | 43,395 psi | 71% | 2605 fps | 99.5% |
| Somchem S335 | <<locked>> | 80% | 38,711 psi | 64% | 2444 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 38,014 psi | 62% | 2497 fps | 97.2% |
| Somchem S355 | <<locked>> | 80% | 30,139 psi | 49% | 2339 fps | 95.1% |
| Somchem S365 | <<locked>> | 88% | 27,905 psi | 46% | 2362 fps | 95.3% |
| Vihtavuori N130 | <<locked>> | 80% | 44,585 psi | 73% | 2513 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 39,450 psi | 65% | 2441 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 34,606 psi | 57% | 2418 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 35,491 psi | 58% | 2425 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 80% | 28,456 psi | 47% | 2277 fps | 96.1% |
| Vihtavuori N160 | <<locked>> | 92% | 37,550 psi | 62% | 2526 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 40,263 psi | 66% | 2523 fps | 98.9% |
| Vihtavuori N540 | <<locked>> | 80% | 34,113 psi | 56% | 2411 fps | 99.2% |
| Vihtavuori N550 | <<locked>> | 92% | 36,695 psi | 60% | 2530 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 31,401 psi | 52% | 2356 fps | 95.3% |
| Winchester 748 | <<locked>> | 80% | 39,349 psi | 65% | 2566 fps | 99.3% |
| Winchester 760 | <<locked>> | 98% | 47,007 psi | 77% | 2740 fps | 95.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 36,071 psi | 59% | 2484 fps | 97.4% |
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 101 powders for .375 Blaser Mag. loaded with the .375 | 250gr | Hornady GMX. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,907 fps; across all powders the maximum-charge window runs from 1,663 fps to 2,907 fps. Accurate 4350 gives the best case fill at 100 %, and 101 of the 101 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (420 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 250.0 gr projectile in 0.375" calls for a 1:14.5 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Alliant Reloder-17 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, ReloadSwiss RS 60, ReloadSwiss RS 52 rank at the top here: for .375 Blaser Mag. with the .375 | 250gr | Hornady GMX 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.