Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 200gr | MAKER 200 Grain .308 Expanding Subsonic Blackout Bullets bullet and 78 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Vihtavuori N560 and Accurate MAGPRO.
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% | 51,909 psi | 85% | 2736 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 53,896 psi | 88% | 2772 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 54,346 psi | 89% | 2884 fps | 97.9% |
| ADI AR 2208 | <<locked>> | 82% | 52,866 psi | 87% | 2694 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 55,056 psi | 90% | 2831 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 96% | 52,576 psi | 86% | 2831 fps | 98.4% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 43,743 psi | 72% | 2664 fps | 96.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 38,566 psi | 63% | 2625 fps | 98.4% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 51,735 psi | 85% | 2776 fps | 99.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 53,795 psi | 88% | 2713 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 51,547 psi | 85% | 2779 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 52,446 psi | 86% | 2792 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 54,549 psi | 90% | 2822 fps | 99.4% |
| Alliant Reloder-22 | <<locked>> | 96% | 52,069 psi | 85% | 2825 fps | 99.3% |
| Alliant Reloder-23 | <<locked>> | 98% | 52,866 psi | 87% | 2799 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 48,834 psi | 80% | 2802 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 52,939 psi | 87% | 2887 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 54,607 psi | 90% | 2864 fps | 99.5% |
| Bofors RP3 | <<locked>> | 82% | 54,331 psi | 89% | 2726 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 44,614 psi | 73% | 2733 fps | 97.6% |
| Bofors RP5 | <<locked>> | 96% | 52,069 psi | 85% | 2825 fps | 99.3% |
| Bofors RP7 | <<locked>> | 86% | 53,867 psi | 88% | 2730 fps | 99.7% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 48,167 psi | 79% | 2749 fps | 98.4% |
| Hodgdon H380 | <<locked>> | 82% | 54,723 psi | 90% | 2749 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 52,518 psi | 86% | 2776 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 84% | 52,025 psi | 85% | 2736 fps | 99.3% |
| Hodgdon H4831 | <<locked>> | 94% | 52,808 psi | 87% | 2776 fps | 97.9% |
| Hodgdon H4831 SC | <<locked>> | 94% | 51,619 psi | 85% | 2756 fps | 97.6% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 51,750 psi | 85% | 2703 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 47,776 psi | 78% | 2858 fps | 99.5% |
| Hodgdon Superformance | <<locked>> | 86% | 52,562 psi | 86% | 2812 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,753 psi | 60% | 1709 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 55,042 psi | 90% | 2762 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 84% | 52,069 psi | 85% | 2700 fps | 99.7% |
| IMR 4831 | <<locked>> | 90% | 54,534 psi | 90% | 2766 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 54,244 psi | 89% | 2759 fps | 98.2% |
| IMR 7828 SSC | <<locked>> | 98% | 53,766 psi | 88% | 2861 fps | 98.7% |
| Lovex S065 | <<locked>> | 86% | 52,170 psi | 86% | 2694 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 53,592 psi | 88% | 2743 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 49,574 psi | 81% | 2700 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 52,199 psi | 86% | 2762 fps | 99% |
| Norma 217ᴾ | <<locked>> | 100% | 33,997 psi | 56% | 2543 fps | 96.2% |
| Norma MRP | <<locked>> | 94% | 51,706 psi | 85% | 2848 fps | 99.9% |
| Norma URP | <<locked>> | 88% | 52,736 psi | 87% | 2759 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 54,259 psi | 89% | 2881 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 88% | 51,474 psi | 85% | 2766 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 52,272 psi | 86% | 2815 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,507 psi | 62% | 1749 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 54,505 psi | 89% | 2736 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 51,793 psi | 85% | 2782 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 53,882 psi | 88% | 2799 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 52,402 psi | 86% | 2828 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 47,834 psi | 79% | 2851 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 84% | 54,708 psi | 90% | 2726 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 52,982 psi | 87% | 2746 fps | 98.5% |
| Rottweil R 905 | <<locked>> | 94% | 53,693 psi | 88% | 2805 fps | 99.4% |
| Rottweil R 907 | <<locked>> | 86% | 53,867 psi | 88% | 2730 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 86% | 52,170 psi | 86% | 2694 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 53,592 psi | 88% | 2743 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 52,663 psi | 86% | 2733 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 52,040 psi | 85% | 2562 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 51,648 psi | 85% | 2654 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 53,243 psi | 87% | 2799 fps | 99.4% |
| Somchem S355 | <<locked>> | 84% | 54,549 psi | 90% | 2720 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 54,389 psi | 89% | 2740 fps | 98% |
| Somchem S365 | <<locked>> | 90% | 52,446 psi | 86% | 2759 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 54,186 psi | 89% | 2779 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 84% | 52,402 psi | 86% | 2648 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 54,679 psi | 90% | 2753 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 53,635 psi | 88% | 2756 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 88% | 53,679 psi | 88% | 2756 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 55,100 psi | 90% | 2822 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 51,851 psi | 85% | 2841 fps | 98% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 50,952 psi | 84% | 2812 fps | 98.1% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 54,259 psi | 89% | 2717 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 52,707 psi | 87% | 2779 fps | 99.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 53,040 psi | 87% | 2927 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 54,375 psi | 89% | 2779 fps | 99.4% |
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% | 29,907 psi | 49% | 2310 fps | 96.1% |
| Accurate 4350 | <<locked>> | 80% | 40,857 psi | 67% | 2559 fps | 99.8% |
| Accurate MAGPRO | 70.9 gr | 90% | 43,845 psi | 72% | 2700 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 49,530 psi | 81% | 2641 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 36,825 psi | 60% | 2493 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 88% | 40,059 psi | 66% | 2592 fps | 95.3% |
| ADI AR 2217 | <<locked>> | 98% | 40,857 psi | 67% | 2605 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 94% | 31,720 psi | 52% | 2444 fps | 95.5% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 37,159 psi | 61% | 2497 fps | 95.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,386 psi | 83% | 2664 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,523 psi | 65% | 2569 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 45,426 psi | 75% | 2687 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 36,782 psi | 60% | 2490 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 84% | 34,548 psi | 57% | 2484 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,008 psi | 48% | 2343 fps | 99% |
| Alliant Reloder-25 | <<locked>> | 82% | 27,021 psi | 44% | 2300 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 80% | 31,140 psi | 51% | 2461 fps | 98% |
| Bofors RP15 | <<locked>> | 88% | 36,695 psi | 60% | 2533 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 50,836 psi | 83% | 2677 fps | 100% |
| Bofors RP30 | <<locked>> | 94% | 36,448 psi | 60% | 2562 fps | 95% |
| Bofors RP5 | <<locked>> | 84% | 34,548 psi | 57% | 2484 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 44,454 psi | 73% | 2569 fps | 98.6% |
| Hodgdon H1000 | <<locked>> | 94% | 39,175 psi | 64% | 2572 fps | 95.9% |
| Hodgdon H380 | <<locked>> | 80% | 51,227 psi | 84% | 2697 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 42,801 psi | 70% | 2608 fps | 98.8% |
| Hodgdon H4350 | <<locked>> | 80% | 45,658 psi | 75% | 2628 fps | 98.4% |
| Hodgdon H4831 | <<locked>> | 88% | 42,844 psi | 70% | 2598 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 88% | 42,076 psi | 69% | 2585 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,072 psi | 61% | 2461 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 34,389 psi | 56% | 2549 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 41,843 psi | 69% | 2628 fps | 98.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,456 psi | 45% | 1526 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 40,132 psi | 66% | 2507 fps | 97.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,021 psi | 76% | 2598 fps | 99.2% |
| IMR 4831 | <<locked>> | 80% | 39,131 psi | 64% | 2513 fps | 99.7% |
| IMR 4955 Enduron | <<locked>> | 86% | 42,090 psi | 69% | 2546 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 90% | 41,104 psi | 67% | 2628 fps | 95.8% |
| Lovex S065 | <<locked>> | 80% | 43,352 psi | 71% | 2546 fps | 99.5% |
| Lovex S070 | <<locked>> | 80% | 41,495 psi | 68% | 2533 fps | 98.7% |
| Lovex S071 | <<locked>> | 84% | 29,356 psi | 48% | 2293 fps | 95.8% |
| Norma 204 | <<locked>> | 80% | 39,668 psi | 65% | 2536 fps | 96.5% |
| Norma 217 | <<locked>> | 98% | 31,763 psi | 52% | 2484 fps | 95.1% |
| Norma MRP | 61.9 gr | 80% | 31,444 psi | 52% | 2431 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 40,437 psi | 66% | 2552 fps | 99.8% |
| Ramshot Grand | <<locked>> | 88% | 37,898 psi | 62% | 2572 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 39,334 psi | 65% | 2546 fps | 98.8% |
| Ramshot Magnum | <<locked>> | 88% | 33,475 psi | 55% | 2454 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,021 psi | 46% | 1562 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,111 psi | 84% | 2684 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 48,298 psi | 79% | 2730 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,727 psi | 67% | 2579 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,218 psi | 64% | 2595 fps | 99.6% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 31,183 psi | 51% | 2461 fps | 95% |
| Rottweil R 903 | <<locked>> | 80% | 47,805 psi | 78% | 2625 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 40,959 psi | 67% | 2533 fps | 95.8% |
| Rottweil R 905 | <<locked>> | 82% | 35,853 psi | 59% | 2474 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 44,454 psi | 73% | 2569 fps | 98.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,352 psi | 71% | 2546 fps | 99.5% |
| Shooters World SW4350 | <<locked>> | 80% | 41,495 psi | 68% | 2533 fps | 98.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,298 psi | 81% | 2684 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,921 psi | 80% | 2520 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,337 psi | 70% | 2497 fps | 98.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 35,520 psi | 58% | 2467 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 48,051 psi | 79% | 2625 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 41,611 psi | 68% | 2520 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 37,217 psi | 61% | 2510 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 33,953 psi | 56% | 2402 fps | 95.9% |
| Vihtavuori N150 | <<locked>> | 80% | 45,861 psi | 75% | 2552 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,989 psi | 69% | 2549 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 84% | 33,504 psi | 55% | 2385 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 41,336 psi | 68% | 2552 fps | 99.8% |
| Vihtavuori N555 | <<locked>> | 80% | 32,285 psi | 53% | 2411 fps | 98.9% |
| Vihtavuori N560 | 68 gr | 88% | 41,959 psi | 69% | 2657 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 94% | 41,278 psi | 68% | 2638 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,959 psi | 67% | 2516 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 42,975 psi | 71% | 2612 fps | 98.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,469 psi | 42% | 2336 fps | 98.8% |
| Winchester Supreme 780 | <<locked>> | 84% | 35,665 psi | 59% | 2441 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 78 powders for .300 Blaser Mag. loaded with the .308 | 200gr | MAKER 200 Grain .308 Expanding Subsonic Blackout Bullets. Winchester StaBALL HD delivers the highest muzzle velocity at 2,927 fps; across all powders the maximum-charge window runs from 1,709 fps to 2,927 fps. ADI AR 2217 gives the best case fill at 100 %, and 78 of the 78 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (420 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 200.0 gr projectile in 0.308" calls for a 1:12.0 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. Norma MRP, Vihtavuori N560, Accurate MAGPRO rank at the top here: for .300 Blaser Mag. with the .308 | 200gr | MAKER 200 Grain .308 Expanding Subsonic Blackout Bullets 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.