Load Specifications
Bullet Manufacturer:Hammer
Bullet Weight:305 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 | 305gr | Hammer Claw Hammer bullet and 104 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 2495 | <<locked>> | 86% | 54,273 psi | 89% | 2474 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 52,881 psi | 87% | 2487 fps | 98.3% |
| Accurate 3100ᴾ | <<locked>> | 100% | 44,599 psi | 73% | 2464 fps | 98.5% |
| Accurate 4064 | <<locked>> | 88% | 54,360 psi | 89% | 2520 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 54,215 psi | 89% | 2615 fps | 100% |
| ADI AR 2206H | <<locked>> | 84% | 54,288 psi | 89% | 2549 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 52,083 psi | 86% | 2510 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 52,098 psi | 86% | 2598 fps | 97.5% |
| ADI Benchmark 8208 | <<locked>> | 82% | 53,359 psi | 88% | 2503 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 54,418 psi | 89% | 2467 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 53,882 psi | 88% | 2664 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 54,998 psi | 90% | 2559 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 52,170 psi | 86% | 2526 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 52,736 psi | 87% | 2549 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 51,866 psi | 85% | 2618 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 52,794 psi | 87% | 2644 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 51,184 psi | 84% | 2589 fps | 97.5% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 44,860 psi | 74% | 2533 fps | 96.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,293 psi | 69% | 2490 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 37,159 psi | 61% | 2405 fps | 97.3% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 47,471 psi | 78% | 2648 fps | 99.8% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 53,911 psi | 89% | 2569 fps | 100% |
| Bofors RP3 | <<locked>> | 88% | 52,649 psi | 86% | 2543 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 44,860 psi | 74% | 2533 fps | 96.2% |
| Bofors RP7 | <<locked>> | 92% | 52,591 psi | 86% | 2523 fps | 98.4% |
| Hodgdon Benchmark | <<locked>> | 82% | 54,723 psi | 90% | 2480 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 52,605 psi | 86% | 2533 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 53,432 psi | 88% | 2556 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 94% | 53,156 psi | 87% | 2612 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 92% | 53,809 psi | 88% | 2575 fps | 98.1% |
| Hodgdon H4895 | <<locked>> | 84% | 54,839 psi | 90% | 2556 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 51,750 psi | 85% | 2549 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 54,534 psi | 90% | 2592 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 53,359 psi | 88% | 2648 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,969 psi | 59% | 1539 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 52,649 psi | 86% | 2513 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 51,895 psi | 85% | 2493 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 54,882 psi | 90% | 2536 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 54,563 psi | 90% | 2523 fps | 99% |
| IMR 4350 | <<locked>> | 96% | 52,910 psi | 87% | 2549 fps | 98.5% |
| IMR 4451 Enduron | <<locked>> | 92% | 54,360 psi | 89% | 2549 fps | 99% |
| IMR 4831 | <<locked>> | 98% | 54,621 psi | 90% | 2605 fps | 100% |
| IMR 4895 | <<locked>> | 86% | 54,041 psi | 89% | 2575 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 53,359 psi | 88% | 2503 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 54,172 psi | 89% | 2523 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 53,635 psi | 88% | 2480 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 54,708 psi | 90% | 2530 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 54,012 psi | 89% | 2546 fps | 99.7% |
| Lovex S070 | <<locked>> | 96% | 54,940 psi | 90% | 2582 fps | 99.3% |
| Lovex S071ᴾ | <<locked>> | 100% | 37,144 psi | 61% | 2333 fps | 96.8% |
| Norma 201 | <<locked>> | 84% | 53,142 psi | 87% | 2500 fps | 100% |
| Norma 202 | <<locked>> | 84% | 53,708 psi | 88% | 2497 fps | 100% |
| Norma 203B | <<locked>> | 86% | 51,967 psi | 85% | 2536 fps | 100% |
| Norma 204 | <<locked>> | 96% | 53,490 psi | 88% | 2598 fps | 97.6% |
| Norma MRPᴾ | <<locked>> | 100% | 47,210 psi | 78% | 2605 fps | 98.2% |
| Norma URP | <<locked>> | 96% | 53,127 psi | 87% | 2602 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 52,170 psi | 86% | 2559 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 51,895 psi | 85% | 2602 fps | 99.4% |
| Ramshot TAC | <<locked>> | 82% | 53,229 psi | 87% | 2526 fps | 99.7% |
| Ramshot Wild Boar | <<locked>> | 82% | 52,997 psi | 87% | 2539 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,463 psi | 60% | 1575 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 53,708 psi | 88% | 2546 fps | 99.3% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 53,127 psi | 87% | 2608 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 52,402 psi | 86% | 2638 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 53,795 psi | 88% | 2638 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 53,040 psi | 87% | 2664 fps | 99.9% |
| Rottweil R 901 | <<locked>> | 82% | 54,302 psi | 89% | 2477 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 53,679 psi | 88% | 2497 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 52,765 psi | 87% | 2536 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 53,969 psi | 89% | 2572 fps | 96.7% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 50,096 psi | 82% | 2575 fps | 97.5% |
| Rottweil R 907 | <<locked>> | 92% | 52,591 psi | 86% | 2523 fps | 98.4% |
| Shooters World Long Rifle | <<locked>> | 94% | 54,012 psi | 89% | 2546 fps | 99.7% |
| Shooters World Match Rifle | <<locked>> | 84% | 54,172 psi | 89% | 2523 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 54,708 psi | 90% | 2530 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 54,940 psi | 90% | 2582 fps | 99.3% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 54,172 psi | 89% | 2592 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 51,808 psi | 85% | 2507 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 52,736 psi | 87% | 2526 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 54,375 psi | 89% | 2434 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 54,679 psi | 90% | 2434 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 54,099 psi | 89% | 2503 fps | 99% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 49,603 psi | 81% | 2569 fps | 97.3% |
| Somchem S335 | <<locked>> | 84% | 53,896 psi | 88% | 2434 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 54,969 psi | 90% | 2543 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 53,055 psi | 87% | 2536 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 54,824 psi | 90% | 2644 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 50,720 psi | 83% | 2556 fps | 98.2% |
| Vihtavuori N133 | <<locked>> | 84% | 54,766 psi | 90% | 2418 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 53,679 psi | 88% | 2461 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 54,186 psi | 89% | 2477 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 54,172 psi | 89% | 2510 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 52,054 psi | 85% | 2549 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 43,787 psi | 72% | 2431 fps | 96.3% |
| Vihtavuori N530 | <<locked>> | 82% | 53,606 psi | 88% | 2500 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 52,257 psi | 86% | 2477 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 54,534 psi | 90% | 2602 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 46,949 psi | 77% | 2556 fps | 99.9% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 51,750 psi | 85% | 2526 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 53,664 psi | 88% | 2543 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 53,345 psi | 88% | 2615 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 37,869 psi | 62% | 2520 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 52,518 psi | 86% | 2533 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 47,587 psi | 78% | 2497 fps | 96.5% |
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 2495 | <<locked>> | 80% | 44,875 psi | 74% | 2352 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 43,555 psi | 72% | 2343 fps | 96.4% |
| Accurate 3100 | <<locked>> | 92% | 34,084 psi | 56% | 2270 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 42,482 psi | 70% | 2356 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 31,401 psi | 52% | 2218 fps | 96.7% |
| ADI AR 2206H | <<locked>> | 80% | 47,964 psi | 79% | 2457 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 40,727 psi | 67% | 2326 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 94% | 43,163 psi | 71% | 2448 fps | 95.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 50,067 psi | 82% | 2457 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 51,010 psi | 84% | 2428 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 43,845 psi | 72% | 2507 fps | 99.7% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 48,602 psi | 80% | 2467 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,727 psi | 67% | 2349 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 43,627 psi | 72% | 2408 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 80% | 31,662 psi | 52% | 2231 fps | 96.9% |
| Alliant Reloder-17 | 69.6 gr | 80% | 35,157 psi | 58% | 2343 fps | 99.3% |
| Alliant Reloder-19 | <<locked>> | 94% | 42,409 psi | 70% | 2441 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 98% | 42,047 psi | 69% | 2480 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 84% | 25,933 psi | 43% | 2110 fps | 95.8% |
| Alliant Reloder-25 | <<locked>> | 96% | 32,924 psi | 54% | 2303 fps | 95.5% |
| Alliant Reloder-26 | <<locked>> | 88% | 31,270 psi | 51% | 2313 fps | 96% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 47,195 psi | 77% | 2470 fps | 99.8% |
| Bofors RP3 | <<locked>> | 80% | 40,538 psi | 67% | 2359 fps | 99.9% |
| Bofors RP5 | <<locked>> | 98% | 42,047 psi | 69% | 2480 fps | 95.4% |
| Bofors RP7 | <<locked>> | 82% | 38,711 psi | 64% | 2287 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 51,605 psi | 85% | 2438 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 49,182 psi | 81% | 2484 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 41,133 psi | 68% | 2362 fps | 98.7% |
| Hodgdon H414 | <<locked>> | 82% | 35,839 psi | 59% | 2310 fps | 95.2% |
| Hodgdon H4350 | <<locked>> | 84% | 41,814 psi | 69% | 2382 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 48,457 psi | 80% | 2467 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,066 psi | 48% | 2139 fps | 97.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 44,686 psi | 73% | 2451 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 37,565 psi | 62% | 2372 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,832 psi | 44% | 1375 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 46,427 psi | 76% | 2425 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 48,660 psi | 80% | 2451 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 42,801 psi | 70% | 2356 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 80% | 45,136 psi | 74% | 2379 fps | 97.6% |
| IMR 4350 | <<locked>> | 86% | 38,928 psi | 64% | 2316 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 37,797 psi | 62% | 2270 fps | 95.6% |
| IMR 4831 | <<locked>> | 80% | 30,574 psi | 50% | 2185 fps | 96.4% |
| IMR 4895 | <<locked>> | 80% | 44,701 psi | 73% | 2434 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 80% | 50,067 psi | 82% | 2457 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 47,500 psi | 78% | 2438 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 47,630 psi | 78% | 2395 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 42,917 psi | 70% | 2359 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 35,375 psi | 58% | 2228 fps | 96.5% |
| Lovex S070 | <<locked>> | 82% | 35,665 psi | 59% | 2254 fps | 95.3% |
| Lovex S071 | <<locked>> | 96% | 32,605 psi | 54% | 2238 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 47,094 psi | 77% | 2411 fps | 100% |
| Norma 202 | <<locked>> | 80% | 47,384 psi | 78% | 2411 fps | 100% |
| Norma 203B | <<locked>> | 80% | 42,975 psi | 71% | 2398 fps | 99.8% |
| Norma 204 | <<locked>> | 90% | 43,700 psi | 72% | 2441 fps | 95.5% |
| Norma MRP | <<locked>> | 92% | 36,245 psi | 60% | 2392 fps | 95% |
| Norma URP | <<locked>> | 80% | 31,734 psi | 52% | 2221 fps | 96.6% |
| Ramshot Big Game | <<locked>> | 80% | 42,627 psi | 70% | 2415 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 82% | 32,996 psi | 54% | 2254 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 49,908 psi | 82% | 2477 fps | 99.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 49,574 psi | 81% | 2490 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,195 psi | 45% | 1407 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 41,510 psi | 68% | 2349 fps | 97.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 46,398 psi | 76% | 2510 fps | 99.9% |
| ReloadSwiss RS 60 | 69.6 gr | 80% | 37,405 psi | 61% | 2395 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 31,125 psi | 51% | 2234 fps | 96.2% |
| ReloadSwiss RS 70 | 70.7 gr | 80% | 30,951 psi | 51% | 2234 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 51,111 psi | 84% | 2434 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 44,759 psi | 73% | 2369 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 38,232 psi | 63% | 2310 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 96% | 47,514 psi | 78% | 2474 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 94% | 41,104 psi | 67% | 2421 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 82% | 38,711 psi | 64% | 2287 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 35,375 psi | 58% | 2228 fps | 96.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 47,500 psi | 78% | 2438 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 42,917 psi | 70% | 2359 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 35,665 psi | 59% | 2254 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,160 psi | 64% | 2359 fps | 99.4% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 48,327 psi | 79% | 2454 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 46,470 psi | 76% | 2434 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 48,211 psi | 79% | 2352 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,350 psi | 66% | 2241 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 36,753 psi | 60% | 2221 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 40,741 psi | 67% | 2418 fps | 95.1% |
| Somchem S335 | <<locked>> | 80% | 47,892 psi | 79% | 2356 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 48,022 psi | 79% | 2448 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 38,957 psi | 64% | 2313 fps | 99.6% |
| Somchem S365 | <<locked>> | 80% | 28,398 psi | 47% | 2178 fps | 98.7% |
| Somchem S385 | <<locked>> | 92% | 39,175 psi | 64% | 2359 fps | 95.6% |
| Vihtavuori N133 | <<locked>> | 80% | 48,617 psi | 80% | 2343 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 44,570 psi | 73% | 2339 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 44,962 psi | 74% | 2352 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,043 psi | 61% | 2254 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 33,025 psi | 54% | 2221 fps | 97% |
| Vihtavuori N165 | <<locked>> | 98% | 40,973 psi | 67% | 2382 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 50,212 psi | 82% | 2454 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 43,207 psi | 71% | 2349 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 32,474 psi | 53% | 2221 fps | 96.6% |
| Vihtavuori N555 | <<locked>> | 82% | 26,107 psi | 43% | 2126 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,561 psi | 53% | 2195 fps | 98.8% |
| Winchester 748 | <<locked>> | 80% | 50,270 psi | 83% | 2500 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 35,984 psi | 59% | 2313 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 86% | 24,279 psi | 40% | 2123 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 46,006 psi | 76% | 2438 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 44,454 psi | 73% | 2444 fps | 95.7% |
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 119 powders for .375 Blaser Mag. loaded with the .375 | 305gr | Hammer Claw Hammer . Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,664 fps; across all powders the maximum-charge window runs from 1,539 fps to 2,664 fps. Accurate 3100 gives the best case fill at 100 %, and 119 of the 119 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 305.0 gr projectile in 0.375" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2209 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 | 305gr | Hammer Claw Hammer they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2213, Hodgdon H1000 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.