Load Specifications
Bullet:.375 | 300gr | Swift A-Frame
Bullet Manufacturer:Swift
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 | Swift A-Frame bullet and 103 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, ReloadSwiss RS 70 and Alliant Reloder-16.
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% | 54,969 psi | 90% | 2510 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 53,417 psi | 88% | 2526 fps | 98.3% |
| Accurate 3100ᴾ | <<locked>> | 100% | 45,469 psi | 75% | 2507 fps | 98.6% |
| Accurate 4064 | <<locked>> | 86% | 51,779 psi | 85% | 2516 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 51,547 psi | 85% | 2608 fps | 100% |
| ADI AR 2206H | <<locked>> | 84% | 54,882 psi | 90% | 2589 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 52,620 psi | 86% | 2546 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 52,939 psi | 87% | 2641 fps | 97.6% |
| ADI Benchmark 8208 | <<locked>> | 82% | 53,780 psi | 88% | 2539 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 55,085 psi | 90% | 2507 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 54,679 psi | 90% | 2710 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 52,924 psi | 87% | 2569 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 53,258 psi | 87% | 2589 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 52,576 psi | 86% | 2657 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 53,621 psi | 88% | 2687 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 51,967 psi | 85% | 2631 fps | 97.6% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 45,571 psi | 75% | 2575 fps | 96.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,931 psi | 70% | 2530 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 37,797 psi | 62% | 2444 fps | 97.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 48,428 psi | 80% | 2694 fps | 99.9% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 54,723 psi | 90% | 2608 fps | 100% |
| Bofors RP3 | <<locked>> | 88% | 53,548 psi | 88% | 2585 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 45,571 psi | 75% | 2575 fps | 96.4% |
| Bofors RP7 | <<locked>> | 92% | 53,359 psi | 88% | 2566 fps | 98.6% |
| Hodgdon BL-C2 | <<locked>> | 82% | 53,316 psi | 88% | 2569 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 54,259 psi | 89% | 2598 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 94% | 54,143 psi | 89% | 2657 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 92% | 54,491 psi | 89% | 2618 fps | 98.2% |
| Hodgdon H4895 | <<locked>> | 82% | 52,170 psi | 86% | 2552 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 52,417 psi | 86% | 2585 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 51,648 psi | 85% | 2585 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 54,215 psi | 89% | 2690 fps | 99% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,897 psi | 59% | 1562 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 53,243 psi | 87% | 2552 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 52,533 psi | 86% | 2530 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 52,257 psi | 86% | 2533 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 51,764 psi | 85% | 2513 fps | 98.7% |
| IMR 4350 | <<locked>> | 96% | 53,679 psi | 88% | 2592 fps | 98.7% |
| IMR 4451 Enduron | <<locked>> | 92% | 55,085 psi | 90% | 2592 fps | 99.1% |
| IMR 4831 | <<locked>> | 96% | 51,996 psi | 85% | 2598 fps | 100% |
| IMR 4895 | <<locked>> | 86% | 54,636 psi | 90% | 2612 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 52,750 psi | 87% | 2575 fps | 95.8% |
| IMR 8208 XBR | <<locked>> | 82% | 53,780 psi | 88% | 2539 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 54,940 psi | 90% | 2566 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 54,288 psi | 89% | 2520 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 52,141 psi | 86% | 2526 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 54,708 psi | 90% | 2585 fps | 99.7% |
| Lovex S070 | <<locked>> | 94% | 52,417 psi | 86% | 2575 fps | 99% |
| Lovex S071ᴾ | <<locked>> | 100% | 37,710 psi | 62% | 2369 fps | 96.9% |
| Norma 201 | <<locked>> | 84% | 53,824 psi | 88% | 2539 fps | 100% |
| Norma 202 | <<locked>> | 84% | 54,389 psi | 89% | 2536 fps | 100% |
| Norma 203B | <<locked>> | 86% | 52,518 psi | 86% | 2575 fps | 100% |
| Norma 204 | <<locked>> | 96% | 54,128 psi | 89% | 2638 fps | 97.7% |
| Norma MRPᴾ | <<locked>> | 100% | 48,066 psi | 79% | 2651 fps | 98.3% |
| Norma URP | <<locked>> | 96% | 53,998 psi | 89% | 2644 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 52,939 psi | 87% | 2598 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 52,576 psi | 86% | 2641 fps | 99.5% |
| Ramshot TAC | <<locked>> | 82% | 53,867 psi | 88% | 2566 fps | 99.7% |
| Ramshot Wild Boar | <<locked>> | 82% | 53,664 psi | 88% | 2579 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,550 psi | 60% | 1601 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 54,404 psi | 89% | 2585 fps | 99.4% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 53,954 psi | 89% | 2651 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 53,272 psi | 87% | 2680 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 54,737 psi | 90% | 2680 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 53,766 psi | 88% | 2707 fps | 100% |
| Rottweil R 901 | <<locked>> | 82% | 54,723 psi | 90% | 2513 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 54,331 psi | 89% | 2536 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 53,403 psi | 88% | 2575 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 54,868 psi | 90% | 2615 fps | 96.9% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 50,749 psi | 83% | 2615 fps | 97.6% |
| Rottweil R 907 | <<locked>> | 92% | 53,359 psi | 88% | 2566 fps | 98.6% |
| Shooters World Long Rifle | <<locked>> | 94% | 54,708 psi | 90% | 2585 fps | 99.7% |
| Shooters World Match Rifle | <<locked>> | 84% | 54,940 psi | 90% | 2566 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 52,141 psi | 86% | 2526 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 52,417 psi | 86% | 2575 fps | 99% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 51,561 psi | 85% | 2585 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 52,446 psi | 86% | 2546 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 53,403 psi | 88% | 2566 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 54,911 psi | 90% | 2470 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 52,199 psi | 86% | 2434 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 54,665 psi | 90% | 2543 fps | 99.1% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 50,270 psi | 83% | 2608 fps | 97.5% |
| Somchem S335 | <<locked>> | 84% | 54,549 psi | 90% | 2474 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 52,054 psi | 85% | 2533 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 53,708 psi | 88% | 2575 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 52,243 psi | 86% | 2641 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 51,590 psi | 85% | 2595 fps | 98.4% |
| Vihtavuori N133 | <<locked>> | 82% | 52,112 psi | 86% | 2415 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 54,418 psi | 89% | 2500 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 54,752 psi | 90% | 2513 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 54,969 psi | 90% | 2549 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 52,910 psi | 87% | 2592 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 44,454 psi | 73% | 2470 fps | 96.5% |
| Vihtavuori N530 | <<locked>> | 82% | 54,259 psi | 89% | 2539 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 52,895 psi | 87% | 2516 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 51,880 psi | 85% | 2598 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 47,732 psi | 78% | 2595 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 52,649 psi | 86% | 2569 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 54,433 psi | 89% | 2585 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 54,143 psi | 89% | 2657 fps | 99.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,580 psi | 63% | 2562 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 53,214 psi | 87% | 2572 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 48,283 psi | 79% | 2536 fps | 96.7% |
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% | 45,353 psi | 74% | 2385 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 44,048 psi | 72% | 2379 fps | 96.6% |
| Accurate 3100 | <<locked>> | 90% | 32,343 psi | 53% | 2257 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 42,917 psi | 70% | 2392 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 31,894 psi | 52% | 2254 fps | 96.9% |
| ADI AR 2206H | <<locked>> | 80% | 48,486 psi | 80% | 2497 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 41,234 psi | 68% | 2365 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 94% | 43,671 psi | 72% | 2487 fps | 95.5% |
| ADI Benchmark 8208 | <<locked>> | 80% | 50,560 psi | 83% | 2493 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 51,706 psi | 85% | 2467 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 44,541 psi | 73% | 2549 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,263 psi | 68% | 2388 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,135 psi | 72% | 2448 fps | 99.7% |
| Alliant Reloder-16 | 66.4 gr | 80% | 31,966 psi | 52% | 2264 fps | 97% |
| Alliant Reloder-17 | <<locked>> | 80% | 35,766 psi | 59% | 2382 fps | 99.4% |
| Alliant Reloder-19 | <<locked>> | 94% | 43,091 psi | 71% | 2480 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 98% | 42,786 psi | 70% | 2523 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 82% | 24,758 psi | 41% | 2093 fps | 95% |
| Alliant Reloder-25 | <<locked>> | 96% | 33,446 psi | 55% | 2343 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 86% | 29,689 psi | 49% | 2293 fps | 95% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 47,892 psi | 79% | 2510 fps | 99.8% |
| Bofors RP3 | <<locked>> | 80% | 41,176 psi | 68% | 2395 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 42,786 psi | 70% | 2523 fps | 95.7% |
| Bofors RP7 | <<locked>> | 82% | 39,131 psi | 64% | 2323 fps | 95.5% |
| Hodgdon BL-C2 | <<locked>> | 80% | 49,922 psi | 82% | 2523 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 41,756 psi | 69% | 2402 fps | 98.8% |
| Hodgdon H414 | <<locked>> | 82% | 36,463 psi | 60% | 2349 fps | 95.4% |
| Hodgdon H4350 | <<locked>> | 84% | 42,322 psi | 69% | 2418 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 48,965 psi | 80% | 2503 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,486 psi | 48% | 2175 fps | 97.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 45,281 psi | 74% | 2490 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 38,101 psi | 63% | 2408 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,847 psi | 44% | 1394 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 46,920 psi | 77% | 2461 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 49,139 psi | 81% | 2487 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,352 psi | 71% | 2392 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 80% | 45,745 psi | 75% | 2418 fps | 97.7% |
| IMR 4350 | <<locked>> | 86% | 39,378 psi | 65% | 2352 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 38,232 psi | 63% | 2306 fps | 95.7% |
| IMR 4831 | <<locked>> | 80% | 31,009 psi | 51% | 2218 fps | 96.6% |
| IMR 4895 | <<locked>> | 80% | 45,194 psi | 74% | 2470 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 98% | 49,574 psi | 81% | 2526 fps | 95.1% |
| IMR 8208 XBR | <<locked>> | 80% | 50,560 psi | 83% | 2493 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 48,196 psi | 79% | 2474 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,182 psi | 79% | 2434 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 43,497 psi | 71% | 2395 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 35,708 psi | 59% | 2260 fps | 96.5% |
| Lovex S070 | <<locked>> | 82% | 36,172 psi | 59% | 2290 fps | 95.5% |
| Lovex S071 | <<locked>> | 96% | 33,228 psi | 55% | 2277 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 47,471 psi | 78% | 2448 fps | 100% |
| Norma 202 | <<locked>> | 80% | 47,964 psi | 79% | 2448 fps | 100% |
| Norma 203B | <<locked>> | 80% | 43,511 psi | 71% | 2434 fps | 99.9% |
| Norma 204 | <<locked>> | 90% | 44,483 psi | 73% | 2484 fps | 95.7% |
| Norma MRP | <<locked>> | 92% | 36,825 psi | 60% | 2434 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 32,169 psi | 53% | 2257 fps | 96.8% |
| Ramshot Big Game | <<locked>> | 80% | 43,323 psi | 71% | 2454 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 82% | 33,417 psi | 55% | 2290 fps | 95.2% |
| Ramshot TAC | <<locked>> | 80% | 50,517 psi | 83% | 2516 fps | 99.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 50,256 psi | 83% | 2530 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,209 psi | 45% | 1427 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,018 psi | 69% | 2388 fps | 97.5% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 46,934 psi | 77% | 2546 fps | 99.9% |
| ReloadSwiss RS 60 | 71.6 gr | 80% | 38,058 psi | 62% | 2434 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 31,589 psi | 52% | 2270 fps | 96.3% |
| ReloadSwiss RS 70 | 72.7 gr | 80% | 31,430 psi | 52% | 2274 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 51,619 psi | 85% | 2470 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 45,353 psi | 74% | 2408 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 38,754 psi | 64% | 2346 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 96% | 48,283 psi | 79% | 2516 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 94% | 41,843 psi | 69% | 2464 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 82% | 39,131 psi | 64% | 2323 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 35,708 psi | 59% | 2260 fps | 96.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 48,196 psi | 79% | 2474 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 43,497 psi | 71% | 2395 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 36,172 psi | 59% | 2290 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,595 psi | 65% | 2392 fps | 99.5% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 49,066 psi | 81% | 2497 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 46,891 psi | 77% | 2470 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 48,660 psi | 80% | 2388 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,785 psi | 67% | 2274 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 37,275 psi | 61% | 2257 fps | 95.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 41,452 psi | 68% | 2457 fps | 95.3% |
| Somchem S335 | <<locked>> | 80% | 48,269 psi | 79% | 2392 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 48,718 psi | 80% | 2487 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 39,320 psi | 65% | 2346 fps | 99.7% |
| Somchem S365 | <<locked>> | 80% | 28,921 psi | 47% | 2218 fps | 98.8% |
| Somchem S385 | <<locked>> | 92% | 39,798 psi | 65% | 2398 fps | 95.7% |
| Vihtavuori N133 | <<locked>> | 80% | 49,066 psi | 81% | 2375 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 45,092 psi | 74% | 2375 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 45,513 psi | 75% | 2388 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,507 psi | 62% | 2287 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 33,489 psi | 55% | 2254 fps | 97.1% |
| Vihtavuori N165 | <<locked>> | 96% | 39,146 psi | 64% | 2375 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 50,879 psi | 84% | 2493 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 43,801 psi | 72% | 2385 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 33,011 psi | 54% | 2257 fps | 96.8% |
| Vihtavuori N555 | <<locked>> | 82% | 26,600 psi | 44% | 2162 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,011 psi | 54% | 2234 fps | 98.9% |
| Winchester 748 | <<locked>> | 80% | 50,908 psi | 84% | 2536 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 36,463 psi | 60% | 2349 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 86% | 24,627 psi | 40% | 2162 fps | 95.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 46,601 psi | 77% | 2477 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 42,134 psi | 69% | 2431 fps | 95.1% |
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 103 powders for .375 Blaser Mag. loaded with the .375 | 300gr | Swift A-Frame. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,710 fps; across all powders the maximum-charge window runs from 1,562 fps to 2,710 fps. Accurate 3100 gives the best case fill at 100 %, and 103 of the 103 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 60, ReloadSwiss RS 70, Alliant Reloder-16 rank at the top here: for .375 Blaser Mag. with the .375 | 300gr | Swift A-Frame 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.