Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 180gr | Speer RN bullet and 76 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 Alliant Reloder-26.
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% | 53,026 psi | 87% | 2897 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 54,708 psi | 90% | 2936 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 54,360 psi | 89% | 3048 fps | 98.4% |
| Accurate MAGPRO | <<locked>> | 94% | 51,372 psi | 84% | 2979 fps | 96.6% |
| ADI AR 2208 | <<locked>> | 82% | 53,330 psi | 88% | 2854 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 51,953 psi | 85% | 2933 fps | 98.6% |
| ADI AR 2213 | <<locked>> | 96% | 53,156 psi | 87% | 2989 fps | 97.9% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 44,454 psi | 73% | 2812 fps | 96% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 39,392 psi | 65% | 2769 fps | 97.8% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 52,199 psi | 86% | 2930 fps | 98.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 54,288 psi | 89% | 2877 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 52,011 psi | 85% | 2943 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 52,939 psi | 87% | 2959 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 55,013 psi | 90% | 2979 fps | 99.1% |
| Alliant Reloder-22 | <<locked>> | 96% | 52,765 psi | 87% | 2986 fps | 98.9% |
| Alliant Reloder-23 | <<locked>> | 98% | 53,693 psi | 88% | 2966 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 49,487 psi | 81% | 2959 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 53,766 psi | 88% | 3051 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 51,764 psi | 85% | 2969 fps | 98.7% |
| Bofors RP30ᴾ | <<locked>> | 100% | 45,527 psi | 75% | 2887 fps | 97% |
| Bofors RP5 | <<locked>> | 96% | 52,765 psi | 87% | 2986 fps | 98.9% |
| Bofors RP7 | <<locked>> | 86% | 54,375 psi | 89% | 2887 fps | 99.5% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 49,023 psi | 80% | 2907 fps | 97.9% |
| Hodgdon H414 | <<locked>> | 86% | 53,026 psi | 87% | 2936 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 84% | 52,562 psi | 86% | 2894 fps | 98.9% |
| Hodgdon H4831 | <<locked>> | 94% | 53,287 psi | 87% | 2930 fps | 97.3% |
| Hodgdon H4831 SC | <<locked>> | 94% | 52,185 psi | 86% | 2910 fps | 97.1% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 52,402 psi | 86% | 2867 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 48,515 psi | 80% | 3015 fps | 99.1% |
| Hodgdon Superformance | <<locked>> | 86% | 53,127 psi | 87% | 2972 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,825 psi | 60% | 1827 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 52,344 psi | 86% | 2871 fps | 99.3% |
| IMR 4451 Enduron | <<locked>> | 84% | 52,591 psi | 86% | 2858 fps | 99.5% |
| IMR 4831 | <<locked>> | 88% | 51,764 psi | 85% | 2877 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 54,737 psi | 90% | 2917 fps | 97.7% |
| IMR 7828 SSC | <<locked>> | 98% | 54,447 psi | 89% | 3022 fps | 98.2% |
| Lovex S065 | <<locked>> | 86% | 52,997 psi | 87% | 2858 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 54,375 psi | 89% | 2904 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 50,633 psi | 83% | 2861 fps | 99.8% |
| Norma 204 | <<locked>> | 88% | 52,779 psi | 87% | 2920 fps | 98.6% |
| Norma MRP | <<locked>> | 94% | 52,533 psi | 86% | 3012 fps | 99.7% |
| Norma URP | <<locked>> | 88% | 53,432 psi | 88% | 2923 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 55,071 psi | 90% | 3041 fps | 98.6% |
| Ramshot Hunter | <<locked>> | 88% | 52,156 psi | 86% | 2927 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 53,185 psi | 87% | 2976 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,550 psi | 62% | 1870 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 55,100 psi | 90% | 2900 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 52,489 psi | 86% | 2946 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 54,694 psi | 90% | 2963 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 52,924 psi | 87% | 2989 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 48,762 psi | 80% | 3012 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 82% | 52,011 psi | 85% | 2841 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 53,534 psi | 88% | 2904 fps | 98% |
| Rottweil R 905 | <<locked>> | 94% | 54,302 psi | 89% | 2966 fps | 99.1% |
| Rottweil R 907 | <<locked>> | 86% | 54,375 psi | 89% | 2887 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 86% | 52,997 psi | 87% | 2858 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 54,375 psi | 89% | 2904 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 53,316 psi | 88% | 2897 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 52,359 psi | 86% | 2720 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 52,272 psi | 86% | 2808 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 53,853 psi | 88% | 2959 fps | 99% |
| Somchem S355 | <<locked>> | 82% | 51,938 psi | 85% | 2838 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 55,114 psi | 90% | 2897 fps | 97.5% |
| Somchem S365 | <<locked>> | 90% | 53,156 psi | 87% | 2927 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 54,955 psi | 90% | 2940 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 84% | 52,881 psi | 87% | 2808 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 51,706 psi | 85% | 2861 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 54,389 psi | 89% | 2917 fps | 99.3% |
| Vihtavuori N550 | <<locked>> | 88% | 54,549 psi | 90% | 2923 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 52,504 psi | 86% | 2936 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 52,591 psi | 86% | 3002 fps | 97.5% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 51,822 psi | 85% | 2972 fps | 97.6% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 54,853 psi | 90% | 2877 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 53,185 psi | 87% | 2940 fps | 99.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 53,998 psi | 89% | 3100 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 54,882 psi | 90% | 2933 fps | 99% |
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% | 30,908 psi | 51% | 2451 fps | 95.5% |
| Accurate 4350 | <<locked>> | 80% | 41,713 psi | 68% | 2713 fps | 99.6% |
| Accurate High Country | <<locked>> | 86% | 41,017 psi | 67% | 2789 fps | 95.1% |
| Accurate MAGPRO | <<locked>> | 92% | 47,863 psi | 79% | 2917 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 50,024 psi | 82% | 2802 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 39,987 psi | 66% | 2697 fps | 95.8% |
| ADI AR 2213 | <<locked>> | 90% | 43,497 psi | 71% | 2802 fps | 95.5% |
| ADI AR 2217 | <<locked>> | 98% | 41,539 psi | 68% | 2749 fps | 95% |
| ADI AR 2225 | <<locked>> | 96% | 34,650 psi | 57% | 2644 fps | 95.9% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 37,724 psi | 62% | 2641 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,894 psi | 84% | 2825 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 40,074 psi | 66% | 2720 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 46,006 psi | 76% | 2844 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 37,362 psi | 61% | 2635 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 86% | 37,739 psi | 62% | 2687 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,704 psi | 49% | 2480 fps | 98.6% |
| Alliant Reloder-25 | <<locked>> | 84% | 29,617 psi | 49% | 2493 fps | 95.4% |
| Alliant Reloder-26 | 68.3 gr | 80% | 31,952 psi | 52% | 2605 fps | 97.4% |
| Bofors RP15 | <<locked>> | 88% | 37,420 psi | 61% | 2677 fps | 95% |
| Bofors RP30 | <<locked>> | 96% | 39,755 psi | 65% | 2766 fps | 95.2% |
| Bofors RP5 | <<locked>> | 86% | 37,739 psi | 62% | 2687 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 45,034 psi | 74% | 2723 fps | 98.2% |
| Hodgdon H1000 | <<locked>> | 94% | 39,885 psi | 65% | 2717 fps | 95.1% |
| Hodgdon H414 | <<locked>> | 80% | 43,381 psi | 71% | 2762 fps | 98.4% |
| Hodgdon H4350 | <<locked>> | 80% | 46,224 psi | 76% | 2779 fps | 97.8% |
| Hodgdon H4831 | <<locked>> | 90% | 46,615 psi | 77% | 2812 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 90% | 45,658 psi | 75% | 2792 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,753 psi | 62% | 2608 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 92% | 37,362 psi | 61% | 2753 fps | 95.7% |
| Hodgdon Superformance | <<locked>> | 80% | 42,525 psi | 70% | 2779 fps | 98% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,485 psi | 45% | 1631 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 40,524 psi | 67% | 2648 fps | 97.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,369 psi | 76% | 2749 fps | 98.7% |
| IMR 4831 | <<locked>> | 80% | 39,900 psi | 66% | 2664 fps | 99.5% |
| IMR 4955 Enduron | <<locked>> | 88% | 45,440 psi | 75% | 2749 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 90% | 41,611 psi | 68% | 2776 fps | 95% |
| Lovex S065 | <<locked>> | 80% | 44,005 psi | 72% | 2700 fps | 99.3% |
| Lovex S070 | <<locked>> | 80% | 42,293 psi | 69% | 2687 fps | 98.3% |
| Lovex S071 | <<locked>> | 84% | 30,211 psi | 50% | 2434 fps | 95.2% |
| Norma 204 | <<locked>> | 80% | 40,350 psi | 66% | 2684 fps | 95.8% |
| Norma MRP | 68 gr | 82% | 34,403 psi | 56% | 2635 fps | 95.6% |
| Norma URP | <<locked>> | 80% | 41,176 psi | 68% | 2707 fps | 99.5% |
| Ramshot Grand | <<locked>> | 90% | 41,365 psi | 68% | 2782 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 40,016 psi | 66% | 2697 fps | 98.3% |
| Ramshot Magnum | <<locked>> | 90% | 36,854 psi | 61% | 2657 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,021 psi | 46% | 1670 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,532 psi | 85% | 2841 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 48,791 psi | 80% | 2894 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 41,437 psi | 68% | 2733 fps | 99.5% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,885 psi | 65% | 2746 fps | 99.2% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 34,301 psi | 56% | 2667 fps | 95.5% |
| Rottweil R 903 | <<locked>> | 80% | 48,718 psi | 80% | 2789 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 41,437 psi | 68% | 2677 fps | 95% |
| Rottweil R 905 | <<locked>> | 84% | 39,131 psi | 64% | 2677 fps | 95.9% |
| Rottweil R 907 | <<locked>> | 80% | 45,034 psi | 74% | 2723 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 44,005 psi | 72% | 2700 fps | 99.3% |
| Shooters World SW4350 | <<locked>> | 80% | 42,293 psi | 69% | 2687 fps | 98.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,995 psi | 82% | 2848 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 49,255 psi | 81% | 2674 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,989 psi | 71% | 2644 fps | 98.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 38,783 psi | 64% | 2671 fps | 95.7% |
| Somchem S355 | <<locked>> | 80% | 48,704 psi | 80% | 2785 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 45,165 psi | 74% | 2723 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 37,739 psi | 62% | 2661 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 34,795 psi | 57% | 2546 fps | 95.2% |
| Vihtavuori N150 | <<locked>> | 80% | 46,586 psi | 76% | 2710 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,583 psi | 70% | 2703 fps | 99.7% |
| Vihtavuori N165 | <<locked>> | 86% | 36,564 psi | 60% | 2582 fps | 95.5% |
| Vihtavuori N550 | <<locked>> | 80% | 42,018 psi | 69% | 2703 fps | 99.5% |
| Vihtavuori N555 | <<locked>> | 80% | 33,127 psi | 54% | 2559 fps | 98.5% |
| Vihtavuori N560 | 74.6 gr | 90% | 45,687 psi | 75% | 2874 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 94% | 42,206 psi | 69% | 2789 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,495 psi | 68% | 2664 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 43,584 psi | 72% | 2762 fps | 98.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,353 psi | 43% | 2474 fps | 98.3% |
| Winchester Supreme 780 | <<locked>> | 86% | 38,885 psi | 64% | 2641 fps | 95.6% |
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 76 powders for .300 Blaser Mag. loaded with the .308 | 180gr | Speer RN. Winchester StaBALL HD delivers the highest muzzle velocity at 3,100 fps; across all powders the maximum-charge window runs from 1,827 fps to 3,100 fps. ADI AR 2217 gives the best case fill at 100 %, and 76 of the 76 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 180.0 gr projectile in 0.308" calls for a 1:16.0 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, Alliant Reloder-26 rank at the top here: for .300 Blaser Mag. with the .308 | 180gr | Speer RN 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.