Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 208gr | Hornady A-MAX bullet and 77 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate MAGPRO, Alliant Reloder-26 and Ramshot Grand.
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.
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Max Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 96% | 54,215 psi | 89% | 2707 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 52,533 psi | 86% | 2690 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 52,649 psi | 86% | 2799 fps | 97.9% |
| ADI AR 2208 | <<locked>> | 82% | 54,273 psi | 89% | 2651 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 53,229 psi | 87% | 2743 fps | 99.4% |
| ADI AR 2213 | <<locked>> | 96% | 54,404 psi | 89% | 2799 fps | 98.9% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 45,513 psi | 75% | 2644 fps | 97.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 40,176 psi | 66% | 2608 fps | 99.1% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 53,330 psi | 88% | 2740 fps | 99.4% |
| Alliant Reloder-16 | <<locked>> | 88% | 53,447 psi | 88% | 2743 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 54,302 psi | 89% | 2756 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 52,707 psi | 87% | 2733 fps | 99.4% |
| Alliant Reloder-22 | <<locked>> | 96% | 54,041 psi | 89% | 2795 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 98% | 54,897 psi | 90% | 2762 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 50,604 psi | 83% | 2772 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 51,126 psi | 84% | 2799 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 53,142 psi | 87% | 2707 fps | 96% |
| Bofors RP15 | <<locked>> | 98% | 52,982 psi | 87% | 2779 fps | 99.5% |
| Bofors RP30ᴾ | <<locked>> | 100% | 46,572 psi | 76% | 2713 fps | 98.3% |
| Bofors RP5 | <<locked>> | 96% | 54,041 psi | 89% | 2795 fps | 99.6% |
| Bofors RP7 | <<locked>> | 84% | 52,112 psi | 86% | 2641 fps | 99.7% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 50,082 psi | 82% | 2726 fps | 99% |
| Hodgdon H414 | <<locked>> | 86% | 54,259 psi | 89% | 2743 fps | 100% |
| Hodgdon H4350 | <<locked>> | 84% | 53,708 psi | 88% | 2700 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 94% | 54,563 psi | 90% | 2743 fps | 98.4% |
| Hodgdon H4831 SC | <<locked>> | 94% | 53,287 psi | 87% | 2723 fps | 98.2% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 53,519 psi | 88% | 2664 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 49,588 psi | 81% | 2831 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 86% | 54,433 psi | 89% | 2779 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,970 psi | 61% | 1670 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 53,374 psi | 88% | 2680 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 84% | 53,592 psi | 88% | 2664 fps | 99.9% |
| IMR 4831 | <<locked>> | 88% | 52,910 psi | 87% | 2684 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 52,533 psi | 86% | 2677 fps | 98.2% |
| IMR 7828 SSC | <<locked>> | 96% | 51,996 psi | 85% | 2776 fps | 98.7% |
| Lovex S065 | <<locked>> | 86% | 53,998 psi | 89% | 2661 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 52,141 psi | 86% | 2657 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 51,750 psi | 85% | 2674 fps | 100% |
| Norma 204 | <<locked>> | 88% | 53,954 psi | 89% | 2730 fps | 99.4% |
| Norma 217ᴾ | <<locked>> | 100% | 35,737 psi | 59% | 2536 fps | 97.4% |
| Norma MRP | <<locked>> | 94% | 53,824 psi | 88% | 2818 fps | 100% |
| Norma URP | <<locked>> | 88% | 54,534 psi | 90% | 2723 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 52,562 psi | 86% | 2795 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 88% | 53,359 psi | 88% | 2733 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 54,476 psi | 89% | 2789 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,811 psi | 62% | 1709 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 53,809 psi | 88% | 2743 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 52,417 psi | 86% | 2717 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 54,186 psi | 89% | 2792 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 49,937 psi | 82% | 2831 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 44,846 psi | 74% | 2713 fps | 96.4% |
| Rottweil R 903 | <<locked>> | 82% | 53,084 psi | 87% | 2641 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 54,650 psi | 90% | 2713 fps | 98.9% |
| Rottweil R 905 | <<locked>> | 92% | 52,098 psi | 86% | 2720 fps | 99.4% |
| Rottweil R 907 | <<locked>> | 84% | 52,112 psi | 86% | 2641 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 86% | 53,998 psi | 89% | 2661 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 52,141 psi | 86% | 2657 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 54,447 psi | 89% | 2697 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 53,403 psi | 88% | 2520 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 53,258 psi | 87% | 2618 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 51,663 psi | 85% | 2717 fps | 99.4% |
| Somchem S355 | <<locked>> | 82% | 53,069 psi | 87% | 2638 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 52,475 psi | 86% | 2654 fps | 98% |
| Somchem S365 | <<locked>> | 90% | 54,505 psi | 89% | 2723 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 52,779 psi | 87% | 2697 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 84% | 54,172 psi | 89% | 2612 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 53,040 psi | 87% | 2667 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 51,982 psi | 85% | 2674 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 86% | 52,083 psi | 86% | 2674 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 53,824 psi | 88% | 2743 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 53,867 psi | 88% | 2815 fps | 98.6% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 53,069 psi | 87% | 2789 fps | 98.7% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 46,311 psi | 76% | 2723 fps | 96.2% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 52,141 psi | 86% | 2628 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 54,491 psi | 89% | 2746 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 98% | 51,532 psi | 85% | 2844 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 52,330 psi | 86% | 2690 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% | 31,763 psi | 52% | 2300 fps | 97.2% |
| Accurate 4350 | <<locked>> | 80% | 42,830 psi | 70% | 2536 fps | 100% |
| Accurate MAGPRO | 68 gr | 88% | 42,772 psi | 70% | 2625 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 80% | 51,068 psi | 84% | 2605 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 35,926 psi | 59% | 2418 fps | 95.8% |
| ADI AR 2213 | <<locked>> | 86% | 39,102 psi | 64% | 2516 fps | 95.4% |
| ADI AR 2217 | <<locked>> | 96% | 39,885 psi | 65% | 2533 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 92% | 31,285 psi | 51% | 2385 fps | 95.8% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 36,172 psi | 59% | 2421 fps | 95.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 41,162 psi | 68% | 2543 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 47,311 psi | 78% | 2654 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 35,839 psi | 59% | 2415 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 82% | 33,895 psi | 56% | 2415 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,618 psi | 50% | 2333 fps | 99.6% |
| Alliant Reloder-25 | <<locked>> | 80% | 26,774 psi | 44% | 2241 fps | 95.4% |
| Alliant Reloder-26 | 62.5 gr | 80% | 32,982 psi | 54% | 2457 fps | 98.9% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 50,053 psi | 82% | 2654 fps | 95.2% |
| Bofors RP15 | <<locked>> | 84% | 33,794 psi | 55% | 2408 fps | 95% |
| Bofors RP30 | <<locked>> | 92% | 35,723 psi | 59% | 2490 fps | 95.1% |
| Bofors RP5 | <<locked>> | 82% | 33,895 psi | 56% | 2415 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 45,934 psi | 75% | 2539 fps | 99.1% |
| Hodgdon H1000 | <<locked>> | 90% | 35,752 psi | 59% | 2441 fps | 95% |
| Hodgdon H414 | <<locked>> | 80% | 44,483 psi | 73% | 2582 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 80% | 47,137 psi | 77% | 2592 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 86% | 41,727 psi | 69% | 2523 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 86% | 40,988 psi | 67% | 2507 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 38,769 psi | 64% | 2434 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 33,736 psi | 55% | 2480 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 43,540 psi | 71% | 2602 fps | 99% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,673 psi | 45% | 1490 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 41,524 psi | 68% | 2477 fps | 98.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 47,326 psi | 78% | 2562 fps | 99.5% |
| IMR 4831 | <<locked>> | 80% | 40,828 psi | 67% | 2487 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 84% | 40,930 psi | 67% | 2470 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 88% | 39,972 psi | 66% | 2549 fps | 95.8% |
| Lovex S065 | <<locked>> | 80% | 45,049 psi | 74% | 2520 fps | 99.8% |
| Lovex S070 | <<locked>> | 80% | 43,294 psi | 71% | 2510 fps | 99.2% |
| Lovex S071 | <<locked>> | 80% | 27,485 psi | 45% | 2188 fps | 95.4% |
| Norma 204 | <<locked>> | 80% | 41,220 psi | 68% | 2510 fps | 97.3% |
| Norma 217 | <<locked>> | 96% | 31,517 psi | 52% | 2425 fps | 95.5% |
| Norma MRP | <<locked>> | 80% | 32,953 psi | 54% | 2418 fps | 96.5% |
| Norma URP | <<locked>> | 80% | 42,206 psi | 69% | 2526 fps | 100% |
| Ramshot Grand | 64.6 gr | 86% | 36,811 psi | 60% | 2493 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 40,959 psi | 67% | 2523 fps | 99.3% |
| Ramshot Magnum | <<locked>> | 86% | 32,735 psi | 54% | 2382 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,311 psi | 46% | 1529 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 50,198 psi | 82% | 2694 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 42,641 psi | 70% | 2559 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 40,930 psi | 67% | 2572 fps | 99.9% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 30,560 psi | 50% | 2392 fps | 95.2% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 41,626 psi | 68% | 2651 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 80% | 49,864 psi | 82% | 2595 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 37,333 psi | 61% | 2402 fps | 95% |
| Rottweil R 905 | <<locked>> | 80% | 35,128 psi | 58% | 2402 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 80% | 45,934 psi | 75% | 2539 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 45,049 psi | 74% | 2520 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 80% | 43,294 psi | 71% | 2510 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 50,995 psi | 84% | 2648 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 50,401 psi | 83% | 2480 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,888 psi | 72% | 2467 fps | 99.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 34,809 psi | 57% | 2398 fps | 95.7% |
| Somchem S355 | <<locked>> | 80% | 49,922 psi | 82% | 2592 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 40,495 psi | 66% | 2444 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 38,972 psi | 64% | 2487 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 35,621 psi | 58% | 2385 fps | 96.8% |
| Vihtavuori N150 | <<locked>> | 80% | 47,659 psi | 78% | 2520 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 43,598 psi | 72% | 2520 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 32,967 psi | 54% | 2320 fps | 95.5% |
| Vihtavuori N550 | <<locked>> | 80% | 43,004 psi | 71% | 2526 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 80% | 34,258 psi | 56% | 2402 fps | 99.5% |
| Vihtavuori N560 | <<locked>> | 86% | 40,930 psi | 67% | 2582 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 90% | 37,985 psi | 62% | 2513 fps | 95% |
| Vihtavuori N568 | <<locked>> | 98% | 43,236 psi | 71% | 2664 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 42,453 psi | 70% | 2484 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 44,657 psi | 73% | 2585 fps | 99.3% |
| Winchester StaBALL HD | <<locked>> | 80% | 27,035 psi | 44% | 2343 fps | 99.7% |
| Winchester Supreme 780 | <<locked>> | 82% | 34,708 psi | 57% | 2365 fps | 95.4% |
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 77 powders for .300 Blaser Mag. loaded with the .308 | 208gr | Hornady A-MAX. Winchester StaBALL HD delivers the highest muzzle velocity at 2,844 fps; across all powders the maximum-charge window runs from 1,670 fps to 2,844 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 59–90 %, leaving at least 10 % headroom. The 208.0 gr projectile in 0.308" calls for a 1:11.0 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. Accurate MAGPRO, Alliant Reloder-26, Ramshot Grand rank at the top here: for .300 Blaser Mag. with the .308 | 208gr | Hornady A-MAX 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.