Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 200gr | Swift A-Frame bullet and 77 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Winchester StaBALL HD and IMR 7828 SSC.
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 3100 | <<locked>> | 96% | 55,013 psi | 90% | 2779 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 52,982 psi | 87% | 2759 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 53,432 psi | 88% | 2871 fps | 97.9% |
| ADI AR 2208 | <<locked>> | 82% | 54,795 psi | 90% | 2723 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 53,795 psi | 88% | 2815 fps | 99.4% |
| ADI AR 2213 | <<locked>> | 96% | 55,056 psi | 90% | 2874 fps | 98.9% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 45,977 psi | 75% | 2710 fps | 97.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 40,901 psi | 67% | 2677 fps | 99.1% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 54,085 psi | 89% | 2812 fps | 99.4% |
| Alliant Reloder-16 | <<locked>> | 88% | 53,896 psi | 88% | 2815 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 54,882 psi | 90% | 2828 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 53,417 psi | 88% | 2805 fps | 99.4% |
| Alliant Reloder-22 | <<locked>> | 96% | 54,752 psi | 90% | 2867 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 96% | 52,170 psi | 86% | 2789 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 51,343 psi | 84% | 2844 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 52,054 psi | 85% | 2874 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 53,853 psi | 88% | 2779 fps | 96% |
| Bofors RP15 | <<locked>> | 98% | 53,766 psi | 88% | 2851 fps | 99.5% |
| Bofors RP30ᴾ | <<locked>> | 100% | 47,326 psi | 78% | 2782 fps | 98.2% |
| Bofors RP5 | <<locked>> | 96% | 54,752 psi | 90% | 2867 fps | 99.6% |
| Bofors RP7 | <<locked>> | 84% | 52,692 psi | 87% | 2710 fps | 99.7% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 50,705 psi | 83% | 2799 fps | 99% |
| Hodgdon H414 | <<locked>> | 86% | 54,795 psi | 90% | 2812 fps | 100% |
| Hodgdon H4350 | <<locked>> | 84% | 54,172 psi | 89% | 2769 fps | 99.5% |
| Hodgdon H4831 | <<locked>> | 94% | 55,027 psi | 90% | 2812 fps | 98.3% |
| Hodgdon H4831 SC | <<locked>> | 94% | 54,099 psi | 89% | 2799 fps | 98.2% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 54,375 psi | 89% | 2740 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 50,488 psi | 83% | 2907 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 86% | 54,984 psi | 90% | 2851 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,898 psi | 61% | 1716 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 53,867 psi | 88% | 2749 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 84% | 54,085 psi | 89% | 2733 fps | 99.9% |
| IMR 4831 | <<locked>> | 88% | 53,461 psi | 88% | 2753 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 52,982 psi | 87% | 2743 fps | 98.1% |
| IMR 7828 SSC | <<locked>> | 96% | 52,721 psi | 87% | 2848 fps | 98.7% |
| Lovex S065 | <<locked>> | 86% | 54,462 psi | 89% | 2730 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 52,547 psi | 86% | 2726 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 52,388 psi | 86% | 2743 fps | 100% |
| Norma 204 | <<locked>> | 88% | 54,534 psi | 90% | 2799 fps | 99.4% |
| Norma 217ᴾ | <<locked>> | 100% | 36,376 psi | 60% | 2602 fps | 97.3% |
| Norma MRP | <<locked>> | 94% | 54,563 psi | 90% | 2890 fps | 100% |
| Norma URP | <<locked>> | 86% | 51,706 psi | 85% | 2743 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 53,127 psi | 87% | 2864 fps | 99% |
| Ramshot Hunter | <<locked>> | 88% | 53,925 psi | 89% | 2802 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 51,184 psi | 84% | 2802 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,695 psi | 62% | 1759 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 54,592 psi | 90% | 2818 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 53,084 psi | 87% | 2785 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 54,882 psi | 90% | 2864 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 50,691 psi | 83% | 2904 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 45,716 psi | 75% | 2785 fps | 96.4% |
| Rottweil R 903 | <<locked>> | 82% | 53,548 psi | 88% | 2710 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 51,822 psi | 85% | 2733 fps | 98.4% |
| Rottweil R 905 | <<locked>> | 92% | 52,881 psi | 87% | 2795 fps | 99.4% |
| Rottweil R 907 | <<locked>> | 84% | 52,692 psi | 87% | 2710 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 86% | 54,462 psi | 89% | 2730 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 52,547 psi | 86% | 2726 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 54,940 psi | 90% | 2766 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 53,809 psi | 88% | 2589 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 53,853 psi | 88% | 2687 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 52,446 psi | 86% | 2789 fps | 99.4% |
| Somchem S355 | <<locked>> | 82% | 53,534 psi | 88% | 2707 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 53,127 psi | 87% | 2723 fps | 98% |
| Somchem S365 | <<locked>> | 88% | 51,735 psi | 85% | 2749 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 53,243 psi | 87% | 2766 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 84% | 54,505 psi | 89% | 2677 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 53,461 psi | 88% | 2736 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 52,692 psi | 87% | 2746 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 86% | 52,808 psi | 87% | 2746 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 54,665 psi | 90% | 2815 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 54,505 psi | 89% | 2884 fps | 98.6% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 53,954 psi | 89% | 2864 fps | 98.7% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 47,123 psi | 77% | 2795 fps | 96.2% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 52,852 psi | 87% | 2700 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 55,042 psi | 90% | 2818 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 98% | 52,721 psi | 87% | 2920 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 53,040 psi | 87% | 2759 fps | 99.3% |
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 3100 | <<locked>> | 80% | 32,184 psi | 53% | 2362 fps | 97.1% |
| Accurate 4350 | <<locked>> | 80% | 43,323 psi | 71% | 2605 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 43,381 psi | 71% | 2690 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 51,474 psi | 85% | 2674 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 36,332 psi | 60% | 2480 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 86% | 39,552 psi | 65% | 2582 fps | 95.3% |
| ADI AR 2217 | <<locked>> | 96% | 40,321 psi | 66% | 2595 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 92% | 31,734 psi | 52% | 2444 fps | 95.7% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 36,564 psi | 60% | 2484 fps | 95.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 41,568 psi | 68% | 2608 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 47,863 psi | 79% | 2723 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 36,230 psi | 59% | 2477 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 82% | 34,360 psi | 56% | 2477 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,951 psi | 51% | 2392 fps | 99.5% |
| Alliant Reloder-25 | <<locked>> | 80% | 27,093 psi | 44% | 2300 fps | 95.3% |
| Alliant Reloder-26 | 65.1 gr | 80% | 33,344 psi | 55% | 2516 fps | 98.8% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 50,647 psi | 83% | 2726 fps | 95.2% |
| Bofors RP15 | <<locked>> | 86% | 36,376 psi | 60% | 2523 fps | 95.8% |
| Bofors RP30 | <<locked>> | 92% | 36,289 psi | 60% | 2556 fps | 95% |
| Bofors RP5 | <<locked>> | 82% | 34,360 psi | 56% | 2477 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 46,470 psi | 76% | 2608 fps | 99% |
| Hodgdon H1000 | <<locked>> | 92% | 38,754 psi | 64% | 2566 fps | 96% |
| Hodgdon H414 | <<locked>> | 80% | 45,063 psi | 74% | 2651 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 80% | 47,776 psi | 78% | 2664 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 86% | 42,192 psi | 69% | 2589 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 86% | 41,466 psi | 68% | 2575 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 39,189 psi | 64% | 2500 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 34,084 psi | 56% | 2543 fps | 95.5% |
| Hodgdon Superformance | <<locked>> | 80% | 44,222 psi | 73% | 2674 fps | 99% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,630 psi | 45% | 1532 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 42,003 psi | 69% | 2543 fps | 98.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 47,819 psi | 79% | 2631 fps | 99.4% |
| IMR 4831 | <<locked>> | 80% | 41,321 psi | 68% | 2552 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 84% | 41,350 psi | 68% | 2536 fps | 95.4% |
| IMR 7828 SSC | 66.9 gr | 88% | 40,364 psi | 66% | 2615 fps | 95.7% |
| Lovex S065 | <<locked>> | 80% | 45,397 psi | 75% | 2585 fps | 99.8% |
| Lovex S070 | <<locked>> | 80% | 43,569 psi | 72% | 2572 fps | 99.1% |
| Lovex S071 | <<locked>> | 80% | 27,746 psi | 46% | 2244 fps | 95.2% |
| Norma 204 | <<locked>> | 80% | 41,742 psi | 69% | 2575 fps | 97.2% |
| Norma 217 | <<locked>> | 96% | 31,952 psi | 52% | 2487 fps | 95.4% |
| Norma MRP | <<locked>> | 80% | 33,388 psi | 55% | 2480 fps | 96.3% |
| Norma URP | <<locked>> | 80% | 42,569 psi | 70% | 2592 fps | 99.9% |
| Ramshot Grand | <<locked>> | 86% | 37,376 psi | 61% | 2562 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 41,495 psi | 68% | 2589 fps | 99.2% |
| Ramshot Magnum | <<locked>> | 86% | 33,330 psi | 55% | 2448 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,239 psi | 46% | 1572 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 50,792 psi | 83% | 2766 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 43,149 psi | 71% | 2625 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 41,524 psi | 68% | 2641 fps | 99.8% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 30,995 psi | 51% | 2454 fps | 95.1% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 42,366 psi | 70% | 2720 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 80% | 50,241 psi | 82% | 2661 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 40,132 psi | 66% | 2516 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 80% | 35,418 psi | 58% | 2461 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 46,470 psi | 76% | 2608 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 80% | 45,397 psi | 75% | 2585 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 80% | 43,569 psi | 72% | 2572 fps | 99.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 51,605 psi | 85% | 2720 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 50,676 psi | 83% | 2546 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 44,295 psi | 73% | 2533 fps | 99.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 35,099 psi | 58% | 2457 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 50,299 psi | 83% | 2657 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 40,944 psi | 67% | 2507 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 39,494 psi | 65% | 2552 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 36,172 psi | 59% | 2451 fps | 96.8% |
| Vihtavuori N150 | <<locked>> | 80% | 47,993 psi | 79% | 2585 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 44,048 psi | 72% | 2585 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 33,301 psi | 55% | 2379 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 43,410 psi | 71% | 2592 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 80% | 34,606 psi | 57% | 2461 fps | 99.4% |
| Vihtavuori N560 | <<locked>> | 86% | 41,510 psi | 68% | 2648 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 92% | 41,205 psi | 68% | 2635 fps | 95.9% |
| Vihtavuori N568 | <<locked>> | 98% | 43,961 psi | 72% | 2736 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 42,960 psi | 71% | 2549 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 45,063 psi | 74% | 2651 fps | 99.2% |
| Winchester StaBALL HD | 62.6 gr | 80% | 27,398 psi | 45% | 2402 fps | 99.6% |
| Winchester Supreme 780 | <<locked>> | 82% | 35,114 psi | 58% | 2428 fps | 95.3% |
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 77 powders for .300 Blaser Mag. loaded with the .308 | 200gr | Swift A-Frame. Winchester StaBALL HD delivers the highest muzzle velocity at 2,920 fps; across all powders the maximum-charge window runs from 1,716 fps to 2,920 fps. ADI AR 2217 gives the best case fill at 100 %, and 77 of the 77 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (420 MPa), the top charges use 60–90 %, leaving at least 10 % headroom. The 200.0 gr projectile in 0.308" calls for a 1:13.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-25 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-26, Winchester StaBALL HD, IMR 7828 SSC rank at the top here: for .300 Blaser Mag. with the .308 | 200gr | 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.