Load Specifications
Bullet Manufacturer:North Fork
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 | NorthFork Bonded Core bullet and 101 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Hodgdon Superformance and Alliant Reloder-17.
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% | 53,925 psi | 89% | 2444 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 52,823 psi | 87% | 2474 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 54,230 psi | 89% | 2533 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 55,042 psi | 90% | 2530 fps | 98.3% |
| Accurate 3100ᴾ | <<locked>> | 100% | 43,062 psi | 71% | 2451 fps | 97.9% |
| Accurate 4064 | <<locked>> | 88% | 52,939 psi | 87% | 2520 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 52,417 psi | 86% | 2605 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 84% | 53,055 psi | 87% | 2549 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 53,940 psi | 89% | 2549 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 50,691 psi | 83% | 2585 fps | 96.8% |
| ADI Benchmark 8208 | <<locked>> | 82% | 51,909 psi | 85% | 2497 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 53,113 psi | 87% | 2470 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 52,431 psi | 86% | 2657 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 54,143 psi | 89% | 2569 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 54,723 psi | 90% | 2592 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 98% | 53,722 psi | 88% | 2657 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 94% | 54,665 psi | 90% | 2687 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 49,763 psi | 82% | 2579 fps | 96.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 40,973 psi | 67% | 2477 fps | 99.9% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 36,085 psi | 59% | 2388 fps | 96.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 45,803 psi | 75% | 2635 fps | 99.6% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 52,533 psi | 86% | 2562 fps | 100% |
| Bofors RP3 | <<locked>> | 90% | 54,679 psi | 90% | 2585 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 54,578 psi | 90% | 2562 fps | 98.5% |
| Hodgdon Benchmark | <<locked>> | 82% | 53,563 psi | 88% | 2480 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 54,810 psi | 90% | 2575 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 52,011 psi | 85% | 2552 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 94% | 51,692 psi | 85% | 2605 fps | 98.7% |
| Hodgdon H4350 | <<locked>> | 92% | 52,489 psi | 86% | 2569 fps | 97.6% |
| Hodgdon H4895 | <<locked>> | 84% | 53,606 psi | 88% | 2556 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 53,374 psi | 88% | 2585 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 53,011 psi | 87% | 2589 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 51,721 psi | 85% | 2638 fps | 98.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,795 psi | 59% | 1545 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 54,679 psi | 90% | 2556 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 53,780 psi | 88% | 2533 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 53,461 psi | 88% | 2533 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 53,316 psi | 88% | 2516 fps | 98.7% |
| IMR 4350 | <<locked>> | 98% | 54,897 psi | 90% | 2592 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 92% | 53,098 psi | 87% | 2543 fps | 98.6% |
| IMR 4831 | <<locked>> | 98% | 52,910 psi | 87% | 2598 fps | 100% |
| IMR 4895 | <<locked>> | 86% | 52,576 psi | 86% | 2569 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 51,909 psi | 85% | 2497 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 52,794 psi | 87% | 2523 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 52,504 psi | 86% | 2480 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 53,476 psi | 88% | 2530 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 52,663 psi | 86% | 2539 fps | 99.4% |
| Lovex S070 | <<locked>> | 96% | 53,606 psi | 88% | 2575 fps | 99% |
| Lovex S071ᴾ | <<locked>> | 100% | 35,752 psi | 59% | 2316 fps | 96% |
| Norma 201 | <<locked>> | 84% | 51,909 psi | 85% | 2497 fps | 100% |
| Norma 202 | <<locked>> | 84% | 52,460 psi | 86% | 2497 fps | 100% |
| Norma 203B | <<locked>> | 88% | 53,940 psi | 89% | 2579 fps | 100% |
| Norma 204 | <<locked>> | 96% | 51,967 psi | 85% | 2589 fps | 97.1% |
| Norma MRPᴾ | <<locked>> | 100% | 45,658 psi | 75% | 2592 fps | 97.6% |
| Norma URP | <<locked>> | 98% | 55,042 psi | 90% | 2641 fps | 100% |
| Ramshot Big Game | <<locked>> | 88% | 54,375 psi | 89% | 2605 fps | 100% |
| Ramshot Hunter | <<locked>> | 98% | 53,737 psi | 88% | 2644 fps | 99.4% |
| Ramshot TAC | <<locked>> | 82% | 52,011 psi | 85% | 2523 fps | 99.5% |
| Ramshot Wild Boar | <<locked>> | 82% | 51,590 psi | 85% | 2536 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,274 psi | 60% | 1581 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 52,402 psi | 86% | 2539 fps | 99% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 51,547 psi | 85% | 2602 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 54,447 psi | 89% | 2680 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 52,083 psi | 86% | 2628 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 55,100 psi | 90% | 2707 fps | 100% |
| Rottweil R 901 | <<locked>> | 82% | 53,026 psi | 87% | 2477 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 52,431 psi | 86% | 2497 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 54,563 psi | 90% | 2579 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 52,460 psi | 86% | 2562 fps | 96.1% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 48,530 psi | 80% | 2562 fps | 96.8% |
| Rottweil R 907 | <<locked>> | 94% | 54,578 psi | 90% | 2562 fps | 98.5% |
| Shooters World Long Rifle | <<locked>> | 94% | 52,663 psi | 86% | 2539 fps | 99.4% |
| Shooters World Match Rifle | <<locked>> | 84% | 52,794 psi | 87% | 2523 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 53,476 psi | 88% | 2530 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 53,606 psi | 88% | 2575 fps | 99% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 52,707 psi | 87% | 2589 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 53,983 psi | 89% | 2549 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 54,723 psi | 90% | 2569 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 53,142 psi | 87% | 2434 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 53,505 psi | 88% | 2438 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 52,576 psi | 86% | 2493 fps | 98.6% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 48,080 psi | 79% | 2556 fps | 96.7% |
| Somchem S335 | <<locked>> | 84% | 52,736 psi | 87% | 2434 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 53,563 psi | 88% | 2539 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 54,868 psi | 90% | 2575 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 52,953 psi | 87% | 2641 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 49,211 psi | 81% | 2543 fps | 97.7% |
| Vihtavuori N133 | <<locked>> | 84% | 53,490 psi | 88% | 2418 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 52,301 psi | 86% | 2461 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 52,924 psi | 87% | 2477 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 52,765 psi | 87% | 2510 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 53,925 psi | 89% | 2589 fps | 99.9% |
| Vihtavuori N530 | <<locked>> | 82% | 52,359 psi | 86% | 2500 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 54,259 psi | 89% | 2520 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 52,924 psi | 87% | 2595 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 45,252 psi | 74% | 2546 fps | 99.8% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 53,882 psi | 88% | 2566 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 52,344 psi | 86% | 2543 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 51,924 psi | 85% | 2608 fps | 98.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 36,738 psi | 60% | 2503 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 86% | 54,549 psi | 90% | 2575 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% | 50,865 psi | 84% | 2405 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 43,569 psi | 72% | 2349 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 50,749 psi | 83% | 2487 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 42,540 psi | 70% | 2336 fps | 95.8% |
| Accurate 3100 | <<locked>> | 94% | 35,143 psi | 58% | 2306 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 41,205 psi | 68% | 2349 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 30,313 psi | 50% | 2208 fps | 96% |
| ADI AR 2206H | <<locked>> | 80% | 46,804 psi | 77% | 2454 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 80% | 39,871 psi | 65% | 2323 fps | 99% |
| ADI AR 2209 | <<locked>> | 96% | 44,744 psi | 73% | 2487 fps | 95.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 48,878 psi | 80% | 2454 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 49,748 psi | 82% | 2431 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 42,728 psi | 70% | 2500 fps | 99.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 39,581 psi | 65% | 2346 fps | 99.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 42,467 psi | 70% | 2402 fps | 99.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 30,806 psi | 51% | 2221 fps | 96.1% |
| Alliant Reloder-17 | 68.7 gr | 80% | 34,200 psi | 56% | 2333 fps | 98.9% |
| Alliant Reloder-19 | <<locked>> | 96% | 43,874 psi | 72% | 2477 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 86% | 26,760 psi | 44% | 2146 fps | 95.9% |
| Alliant Reloder-25 | <<locked>> | 98% | 34,011 psi | 56% | 2339 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 88% | 30,356 psi | 50% | 2297 fps | 95% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 46,050 psi | 76% | 2464 fps | 99.6% |
| Bofors RP3 | <<locked>> | 80% | 39,378 psi | 65% | 2352 fps | 99.8% |
| Bofors RP7 | <<locked>> | 84% | 40,161 psi | 66% | 2326 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 50,473 psi | 83% | 2438 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 47,964 psi | 79% | 2480 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 40,045 psi | 66% | 2356 fps | 98.2% |
| Hodgdon H414 | <<locked>> | 84% | 37,231 psi | 61% | 2352 fps | 95.4% |
| Hodgdon H4350 | <<locked>> | 86% | 43,352 psi | 71% | 2421 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 47,239 psi | 78% | 2464 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 28,326 psi | 47% | 2133 fps | 96.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 43,323 psi | 71% | 2444 fps | 100% |
| Hodgdon Superformance | 78.1 gr | 86% | 39,146 psi | 64% | 2415 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,731 psi | 44% | 1378 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 45,295 psi | 74% | 2421 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 47,253 psi | 78% | 2448 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 41,843 psi | 69% | 2352 fps | 99.4% |
| IMR 4166 Enduron | <<locked>> | 80% | 44,135 psi | 72% | 2372 fps | 97.1% |
| IMR 4350 | <<locked>> | 88% | 40,364 psi | 66% | 2356 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 82% | 39,175 psi | 64% | 2310 fps | 95.7% |
| IMR 4831 | <<locked>> | 80% | 29,602 psi | 49% | 2175 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 43,497 psi | 71% | 2428 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 80% | 48,878 psi | 80% | 2454 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 46,238 psi | 76% | 2434 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 46,543 psi | 76% | 2392 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 41,785 psi | 69% | 2352 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 34,418 psi | 56% | 2218 fps | 95.8% |
| Lovex S070 | <<locked>> | 84% | 36,883 psi | 61% | 2290 fps | 95.4% |
| Lovex S071 | <<locked>> | 98% | 33,591 psi | 55% | 2274 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 45,905 psi | 75% | 2408 fps | 100% |
| Norma 202 | <<locked>> | 80% | 46,180 psi | 76% | 2408 fps | 100% |
| Norma 203B | <<locked>> | 80% | 41,814 psi | 69% | 2392 fps | 99.6% |
| Norma 204 | <<locked>> | 92% | 45,484 psi | 75% | 2484 fps | 95.6% |
| Norma MRP | <<locked>> | 94% | 37,478 psi | 62% | 2431 fps | 95% |
| Norma URP | <<locked>> | 80% | 30,792 psi | 51% | 2211 fps | 95.9% |
| Ramshot Big Game | <<locked>> | 80% | 41,495 psi | 68% | 2408 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 84% | 34,127 psi | 56% | 2293 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 48,660 psi | 80% | 2470 fps | 99.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 48,399 psi | 79% | 2487 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,093 psi | 44% | 1411 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 40,350 psi | 66% | 2339 fps | 96.8% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 44,904 psi | 74% | 2500 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 36,376 psi | 60% | 2385 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 30,052 psi | 49% | 2221 fps | 95.4% |
| ReloadSwiss RS 70 | 71.5 gr | 82% | 32,184 psi | 53% | 2274 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 49,879 psi | 82% | 2434 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 43,758 psi | 72% | 2365 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 37,115 psi | 61% | 2303 fps | 99.4% |
| Rottweil R 904 | <<locked>> | 98% | 49,284 psi | 81% | 2513 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 96% | 42,496 psi | 70% | 2461 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 84% | 40,161 psi | 66% | 2326 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 34,418 psi | 56% | 2218 fps | 95.8% |
| Shooters World Match Rifle | <<locked>> | 80% | 46,238 psi | 76% | 2434 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 41,785 psi | 69% | 2352 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 36,883 psi | 61% | 2290 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 37,927 psi | 62% | 2349 fps | 99.1% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 47,210 psi | 78% | 2451 fps | 99.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 45,179 psi | 74% | 2428 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 47,021 psi | 77% | 2352 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,291 psi | 65% | 2238 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 38,130 psi | 63% | 2260 fps | 95.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 42,119 psi | 69% | 2454 fps | 95.1% |
| Somchem S335 | <<locked>> | 80% | 46,746 psi | 77% | 2356 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 46,891 psi | 77% | 2444 fps | 99.9% |
| Somchem S355 | <<locked>> | 80% | 37,869 psi | 62% | 2306 fps | 99.4% |
| Somchem S365 | <<locked>> | 80% | 27,644 psi | 45% | 2172 fps | 98.1% |
| Somchem S385 | <<locked>> | 94% | 40,466 psi | 66% | 2398 fps | 95.6% |
| Vihtavuori N133 | <<locked>> | 80% | 47,427 psi | 78% | 2339 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 43,308 psi | 71% | 2339 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 43,816 psi | 72% | 2352 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 35,984 psi | 59% | 2247 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 80% | 32,097 psi | 53% | 2211 fps | 96.3% |
| Vihtavuori N530 | <<locked>> | 80% | 48,994 psi | 80% | 2451 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 42,134 psi | 69% | 2346 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 31,531 psi | 52% | 2211 fps | 95.9% |
| Vihtavuori N555 | <<locked>> | 84% | 26,861 psi | 44% | 2162 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,778 psi | 52% | 2192 fps | 98.3% |
| Winchester 748 | <<locked>> | 80% | 49,023 psi | 80% | 2497 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 37,376 psi | 61% | 2356 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 88% | 25,106 psi | 41% | 2162 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 44,889 psi | 74% | 2434 fps | 100% |
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 | 300gr | NorthFork Bonded Core. ReloadSwiss RS 70 delivers the highest muzzle velocity at 2,707 fps; across all powders the maximum-charge window runs from 1,545 fps to 2,707 fps. Accurate 3100 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 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 Reloder-19 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, Hodgdon Superformance, Alliant Reloder-17 rank at the top here: for .375 Blaser Mag. with the .375 | 300gr | NorthFork Bonded Core 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.