Load Specifications
Load data in caliber .300 Blaser Mag. with .307 | 200gr | Frontier PH HPBT bullet and 77 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% | 52,707 psi | 87% | 2740 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 54,665 psi | 90% | 2776 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 54,665 psi | 90% | 2884 fps | 97.9% |
| ADI AR 2208 | <<locked>> | 82% | 53,084 psi | 87% | 2687 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 51,706 psi | 85% | 2772 fps | 99% |
| ADI AR 2213 | <<locked>> | 96% | 52,953 psi | 87% | 2828 fps | 98.4% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 44,077 psi | 72% | 2661 fps | 96.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 39,044 psi | 64% | 2625 fps | 98.4% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 52,011 psi | 85% | 2769 fps | 99.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 54,172 psi | 89% | 2710 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 51,895 psi | 85% | 2779 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 52,634 psi | 86% | 2792 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 54,621 psi | 90% | 2815 fps | 99.4% |
| Alliant Reloder-22 | <<locked>> | 96% | 52,504 psi | 86% | 2825 fps | 99.3% |
| Alliant Reloder-23 | <<locked>> | 98% | 53,258 psi | 87% | 2799 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 49,081 psi | 81% | 2799 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 53,243 psi | 87% | 2887 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 54,795 psi | 90% | 2858 fps | 99.4% |
| Bofors RP3 | <<locked>> | 82% | 54,955 psi | 90% | 2726 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 45,020 psi | 74% | 2733 fps | 97.6% |
| Bofors RP5 | <<locked>> | 96% | 52,504 psi | 86% | 2825 fps | 99.3% |
| Bofors RP7 | <<locked>> | 86% | 54,128 psi | 89% | 2723 fps | 99.7% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 48,472 psi | 80% | 2749 fps | 98.4% |
| Hodgdon H414 | <<locked>> | 86% | 52,779 psi | 87% | 2772 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 84% | 52,402 psi | 86% | 2733 fps | 99.3% |
| Hodgdon H4831 | <<locked>> | 94% | 52,881 psi | 87% | 2766 fps | 97.8% |
| Hodgdon H4831 SC | <<locked>> | 94% | 51,938 psi | 85% | 2753 fps | 97.6% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 52,257 psi | 86% | 2703 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 48,124 psi | 79% | 2854 fps | 99.5% |
| Hodgdon Superformance | <<locked>> | 86% | 52,721 psi | 87% | 2808 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,811 psi | 60% | 1703 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 52,054 psi | 85% | 2710 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 84% | 52,388 psi | 86% | 2697 fps | 99.7% |
| IMR 4831 | <<locked>> | 90% | 54,911 psi | 90% | 2766 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 54,534 psi | 90% | 2756 fps | 98.2% |
| IMR 7828 SSC | <<locked>> | 98% | 54,215 psi | 89% | 2861 fps | 98.7% |
| Lovex S065 | <<locked>> | 86% | 52,692 psi | 87% | 2694 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 54,186 psi | 89% | 2740 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 50,314 psi | 83% | 2703 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 52,692 psi | 87% | 2762 fps | 99% |
| Norma 217ᴾ | <<locked>> | 100% | 34,592 psi | 57% | 2552 fps | 96.4% |
| Norma MRP | <<locked>> | 94% | 51,924 psi | 85% | 2844 fps | 99.9% |
| Norma URP | <<locked>> | 88% | 53,258 psi | 87% | 2759 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 54,752 psi | 90% | 2877 fps | 99% |
| Ramshot Hunter | <<locked>> | 88% | 52,040 psi | 85% | 2766 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 52,692 psi | 87% | 2815 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,608 psi | 62% | 1742 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 54,940 psi | 90% | 2733 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 52,141 psi | 86% | 2779 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 54,302 psi | 89% | 2795 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 52,736 psi | 87% | 2825 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 48,356 psi | 79% | 2851 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 82% | 51,735 psi | 85% | 2674 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 53,229 psi | 87% | 2743 fps | 98.4% |
| Rottweil R 905 | <<locked>> | 94% | 54,056 psi | 89% | 2802 fps | 99.4% |
| Rottweil R 907 | <<locked>> | 86% | 54,128 psi | 89% | 2723 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 86% | 52,692 psi | 87% | 2694 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 54,186 psi | 89% | 2740 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 53,055 psi | 87% | 2730 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 52,286 psi | 86% | 2559 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 51,982 psi | 85% | 2648 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 53,606 psi | 88% | 2799 fps | 99.4% |
| Somchem S355 | <<locked>> | 84% | 55,042 psi | 90% | 2720 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 54,853 psi | 90% | 2740 fps | 98% |
| Somchem S365 | <<locked>> | 90% | 53,055 psi | 87% | 2762 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 54,737 psi | 90% | 2779 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 84% | 52,837 psi | 87% | 2648 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 51,634 psi | 85% | 2700 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 54,114 psi | 89% | 2756 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 88% | 54,317 psi | 89% | 2759 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 52,286 psi | 86% | 2776 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 52,069 psi | 85% | 2838 fps | 98% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 51,401 psi | 84% | 2815 fps | 98.1% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 54,578 psi | 90% | 2713 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 52,968 psi | 87% | 2776 fps | 99.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 53,287 psi | 87% | 2930 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 54,549 psi | 90% | 2772 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% | 30,734 psi | 50% | 2320 fps | 96.4% |
| Accurate 4350 | <<locked>> | 80% | 41,553 psi | 68% | 2562 fps | 99.9% |
| Accurate MAGPRO | 69.9 gr | 90% | 44,367 psi | 73% | 2703 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 80% | 49,980 psi | 82% | 2641 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 37,434 psi | 61% | 2497 fps | 95.8% |
| ADI AR 2213 | <<locked>> | 88% | 40,611 psi | 67% | 2595 fps | 95.4% |
| ADI AR 2217 | <<locked>> | 98% | 41,365 psi | 68% | 2605 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 94% | 32,314 psi | 53% | 2454 fps | 95.7% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 35,172 psi | 58% | 2444 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,981 psi | 84% | 2664 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 40,059 psi | 66% | 2572 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 45,832 psi | 75% | 2687 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 34,867 psi | 57% | 2438 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 84% | 35,143 psi | 58% | 2490 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,704 psi | 49% | 2352 fps | 99.2% |
| Alliant Reloder-25 | <<locked>> | 82% | 27,775 psi | 46% | 2313 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 80% | 31,865 psi | 52% | 2474 fps | 98.2% |
| Bofors RP15 | <<locked>> | 86% | 34,867 psi | 57% | 2480 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 51,663 psi | 85% | 2680 fps | 100% |
| Bofors RP30 | <<locked>> | 94% | 36,883 psi | 61% | 2562 fps | 95.1% |
| Bofors RP5 | <<locked>> | 84% | 35,143 psi | 58% | 2490 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 44,889 psi | 74% | 2569 fps | 98.7% |
| Hodgdon H1000 | <<locked>> | 92% | 37,115 psi | 61% | 2516 fps | 95% |
| Hodgdon H414 | <<locked>> | 80% | 43,250 psi | 71% | 2608 fps | 98.8% |
| Hodgdon H4350 | <<locked>> | 80% | 46,195 psi | 76% | 2625 fps | 98.4% |
| Hodgdon H4831 | <<locked>> | 88% | 43,381 psi | 71% | 2602 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 88% | 42,583 psi | 70% | 2585 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,681 psi | 62% | 2464 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 34,911 psi | 57% | 2552 fps | 95.6% |
| Hodgdon Superformance | <<locked>> | 80% | 42,395 psi | 70% | 2631 fps | 98.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,586 psi | 45% | 1519 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 40,524 psi | 67% | 2507 fps | 97.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,282 psi | 76% | 2595 fps | 99.1% |
| IMR 4831 | <<locked>> | 80% | 39,711 psi | 65% | 2513 fps | 99.7% |
| IMR 4955 Enduron | <<locked>> | 86% | 42,540 psi | 70% | 2549 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 90% | 41,495 psi | 68% | 2628 fps | 95.8% |
| Lovex S065 | <<locked>> | 80% | 44,005 psi | 72% | 2549 fps | 99.6% |
| Lovex S070 | <<locked>> | 80% | 42,221 psi | 69% | 2539 fps | 98.8% |
| Lovex S071 | <<locked>> | 82% | 28,282 psi | 46% | 2257 fps | 95.3% |
| Norma 204 | <<locked>> | 80% | 40,118 psi | 66% | 2536 fps | 96.5% |
| Norma 217 | <<locked>> | 98% | 32,503 psi | 53% | 2497 fps | 95.4% |
| Norma MRP | 61 gr | 80% | 32,082 psi | 53% | 2441 fps | 95.6% |
| Norma URP | <<locked>> | 80% | 41,104 psi | 67% | 2556 fps | 99.8% |
| Ramshot Grand | <<locked>> | 88% | 38,406 psi | 63% | 2575 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 39,784 psi | 65% | 2549 fps | 98.8% |
| Ramshot Magnum | <<locked>> | 88% | 34,069 psi | 56% | 2457 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,195 psi | 46% | 1558 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,532 psi | 85% | 2684 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 48,675 psi | 80% | 2730 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 41,307 psi | 68% | 2582 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,726 psi | 65% | 2598 fps | 99.6% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 31,821 psi | 52% | 2470 fps | 95.3% |
| Rottweil R 903 | <<locked>> | 80% | 48,602 psi | 80% | 2628 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 38,711 psi | 64% | 2477 fps | 95% |
| Rottweil R 905 | <<locked>> | 82% | 36,376 psi | 60% | 2477 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 80% | 44,889 psi | 74% | 2569 fps | 98.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 44,005 psi | 72% | 2549 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 80% | 42,221 psi | 69% | 2539 fps | 98.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,734 psi | 82% | 2680 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 49,153 psi | 81% | 2516 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,033 psi | 71% | 2500 fps | 98.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 36,042 psi | 59% | 2470 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 48,747 psi | 80% | 2625 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 42,003 psi | 69% | 2520 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 37,739 psi | 62% | 2513 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 34,766 psi | 57% | 2411 fps | 96.1% |
| Vihtavuori N150 | <<locked>> | 80% | 46,514 psi | 76% | 2552 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,424 psi | 70% | 2549 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 84% | 34,084 psi | 56% | 2392 fps | 95.4% |
| Vihtavuori N550 | <<locked>> | 80% | 41,887 psi | 69% | 2556 fps | 99.8% |
| Vihtavuori N555 | <<locked>> | 80% | 33,141 psi | 54% | 2425 fps | 99.1% |
| Vihtavuori N560 | 67.1 gr | 88% | 42,598 psi | 70% | 2664 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 92% | 39,189 psi | 64% | 2585 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,452 psi | 68% | 2516 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 43,468 psi | 71% | 2612 fps | 98.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,179 psi | 43% | 2352 fps | 99.1% |
| Winchester Supreme 780 | <<locked>> | 84% | 36,085 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 77 powders for .300 Blaser Mag. loaded with the .307 | 200gr | Frontier PH HPBT. Winchester StaBALL HD delivers the highest muzzle velocity at 2,930 fps; across all powders the maximum-charge window runs from 1,703 fps to 2,930 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 57–90 %, leaving at least 10 % headroom. The 200.0 gr projectile in 0.307" calls for a 1:10.0 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 .307 | 200gr | Frontier PH HPBT 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.