Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 180gr | Sako Hammerhead 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% | 52,257 psi | 86% | 2884 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 53,998 psi | 89% | 2927 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 54,447 psi | 89% | 3031 fps | 97.2% |
| ADI AR 2208 | <<locked>> | 82% | 52,692 psi | 87% | 2841 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 54,737 psi | 90% | 2976 fps | 99% |
| ADI AR 2213 | <<locked>> | 96% | 52,475 psi | 86% | 2972 fps | 97.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 38,856 psi | 64% | 2753 fps | 97.6% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 54,969 psi | 90% | 2972 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 53,824 psi | 88% | 2867 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 54,694 psi | 90% | 2979 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 52,257 psi | 86% | 2946 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 54,259 psi | 89% | 2963 fps | 98.9% |
| Alliant Reloder-22 | <<locked>> | 96% | 52,025 psi | 85% | 2972 fps | 98.8% |
| Alliant Reloder-23 | <<locked>> | 98% | 52,866 psi | 87% | 2953 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 48,791 psi | 80% | 2946 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 52,910 psi | 87% | 3038 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 54,549 psi | 90% | 3012 fps | 99% |
| Bofors RP3 | <<locked>> | 82% | 54,520 psi | 90% | 2881 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 44,628 psi | 73% | 2867 fps | 96.7% |
| Bofors RP5 | <<locked>> | 96% | 52,025 psi | 85% | 2972 fps | 98.8% |
| Bofors RP7 | <<locked>> | 86% | 53,809 psi | 88% | 2874 fps | 99.4% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 48,269 psi | 79% | 2887 fps | 97.6% |
| Hodgdon H380 | <<locked>> | 82% | 54,737 psi | 90% | 2900 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 52,388 psi | 86% | 2923 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 84% | 51,967 psi | 85% | 2881 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 94% | 52,605 psi | 86% | 2913 fps | 97.1% |
| Hodgdon H4831 SC | <<locked>> | 96% | 55,100 psi | 90% | 2953 fps | 97.5% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 51,779 psi | 85% | 2854 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 47,863 psi | 79% | 2995 fps | 98.9% |
| Hodgdon Superformance | <<locked>> | 86% | 52,359 psi | 86% | 2956 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,811 psi | 60% | 1821 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 54,969 psi | 90% | 2910 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 84% | 52,054 psi | 85% | 2844 fps | 99.4% |
| IMR 4831 | <<locked>> | 90% | 54,404 psi | 89% | 2917 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 54,041 psi | 89% | 2900 fps | 97.5% |
| IMR 7828 SSC | <<locked>> | 98% | 53,737 psi | 88% | 3005 fps | 98% |
| Lovex S065 | <<locked>> | 86% | 52,417 psi | 86% | 2848 fps | 99.9% |
| Lovex S070 | <<locked>> | 88% | 53,766 psi | 88% | 2890 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 49,850 psi | 82% | 2844 fps | 99.7% |
| Norma 204 | <<locked>> | 88% | 52,243 psi | 86% | 2907 fps | 98.5% |
| Norma MRP | <<locked>> | 94% | 51,503 psi | 85% | 2992 fps | 99.5% |
| Norma URP | <<locked>> | 88% | 52,794 psi | 87% | 2910 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 54,114 psi | 89% | 3022 fps | 98.4% |
| Ramshot Hunter | <<locked>> | 90% | 55,042 psi | 90% | 2969 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 52,286 psi | 86% | 2959 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,521 psi | 62% | 1864 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 54,505 psi | 89% | 2884 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 51,779 psi | 85% | 2936 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 53,882 psi | 88% | 2946 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 52,127 psi | 86% | 2972 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 47,979 psi | 79% | 2992 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 84% | 54,868 psi | 90% | 2881 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 52,808 psi | 87% | 2887 fps | 97.8% |
| Rottweil R 905 | <<locked>> | 94% | 53,766 psi | 88% | 2953 fps | 99% |
| Rottweil R 907 | <<locked>> | 86% | 53,809 psi | 88% | 2874 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 86% | 52,417 psi | 86% | 2848 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 88% | 53,766 psi | 88% | 2890 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 52,678 psi | 86% | 2887 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 51,924 psi | 85% | 2710 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 51,750 psi | 85% | 2795 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 53,301 psi | 88% | 2949 fps | 98.9% |
| Somchem S355 | <<locked>> | 84% | 54,491 psi | 89% | 2874 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 54,505 psi | 89% | 2884 fps | 97.4% |
| Somchem S365 | <<locked>> | 90% | 52,460 psi | 86% | 2913 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 54,215 psi | 89% | 2923 fps | 99.4% |
| Vihtavuori N150 | <<locked>> | 84% | 52,460 psi | 86% | 2799 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 54,563 psi | 90% | 2904 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 53,722 psi | 88% | 2904 fps | 99.2% |
| Vihtavuori N550 | <<locked>> | 88% | 53,737 psi | 88% | 2907 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 51,880 psi | 85% | 2927 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 51,663 psi | 85% | 2982 fps | 97.2% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 51,111 psi | 84% | 2956 fps | 97.4% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 54,114 psi | 89% | 2864 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 52,605 psi | 86% | 2927 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 52,779 psi | 87% | 3081 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 54,201 psi | 89% | 2920 fps | 98.9% |
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% | 30,385 psi | 50% | 2434 fps | 95.2% |
| Accurate 4350 | <<locked>> | 80% | 41,060 psi | 67% | 2700 fps | 99.5% |
| Accurate MAGPRO | <<locked>> | 92% | 47,108 psi | 77% | 2900 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 49,603 psi | 81% | 2792 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 39,465 psi | 65% | 2684 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 90% | 43,062 psi | 71% | 2789 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 96% | 34,185 psi | 56% | 2628 fps | 95.5% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 39,784 psi | 65% | 2687 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,444 psi | 83% | 2815 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,639 psi | 65% | 2710 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 45,324 psi | 74% | 2831 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 39,392 psi | 65% | 2680 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 86% | 37,246 psi | 61% | 2674 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,327 psi | 48% | 2470 fps | 98.4% |
| Alliant Reloder-25 | <<locked>> | 84% | 29,182 psi | 48% | 2477 fps | 95% |
| Alliant Reloder-26 | 67.5 gr | 80% | 31,430 psi | 52% | 2589 fps | 97.2% |
| Bofors RP15 | <<locked>> | 90% | 39,291 psi | 65% | 2720 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 51,068 psi | 84% | 2828 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 41,887 psi | 69% | 2812 fps | 95.9% |
| Bofors RP5 | <<locked>> | 86% | 37,246 psi | 61% | 2674 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 44,628 psi | 73% | 2710 fps | 98% |
| Hodgdon H1000 | <<locked>> | 96% | 42,076 psi | 69% | 2759 fps | 95.8% |
| Hodgdon H380 | <<locked>> | 80% | 51,271 psi | 84% | 2844 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 42,960 psi | 71% | 2749 fps | 98.2% |
| Hodgdon H4350 | <<locked>> | 80% | 45,643 psi | 75% | 2766 fps | 97.7% |
| Hodgdon H4831 | <<locked>> | 90% | 45,919 psi | 75% | 2792 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 90% | 45,150 psi | 74% | 2779 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,275 psi | 61% | 2595 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 92% | 36,782 psi | 60% | 2733 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 41,959 psi | 69% | 2766 fps | 97.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,528 psi | 45% | 1627 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 40,147 psi | 66% | 2638 fps | 97% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,963 psi | 75% | 2740 fps | 98.6% |
| IMR 4831 | <<locked>> | 80% | 39,305 psi | 65% | 2648 fps | 99.4% |
| IMR 4955 Enduron | <<locked>> | 88% | 44,788 psi | 74% | 2733 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 92% | 44,019 psi | 72% | 2822 fps | 95.7% |
| Lovex S065 | <<locked>> | 80% | 43,584 psi | 72% | 2687 fps | 99.2% |
| Lovex S070 | <<locked>> | 80% | 41,713 psi | 68% | 2671 fps | 98.1% |
| Lovex S071 | <<locked>> | 86% | 31,836 psi | 52% | 2474 fps | 95.9% |
| Norma 204 | <<locked>> | 80% | 39,784 psi | 65% | 2667 fps | 95.6% |
| Norma MRP | 67.2 gr | 82% | 33,924 psi | 56% | 2618 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 40,509 psi | 67% | 2690 fps | 99.4% |
| Ramshot Grand | <<locked>> | 90% | 40,698 psi | 67% | 2762 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 39,479 psi | 65% | 2684 fps | 98.1% |
| Ramshot Magnum | <<locked>> | 90% | 36,274 psi | 60% | 2641 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,079 psi | 46% | 1667 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,140 psi | 84% | 2831 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 48,080 psi | 79% | 2881 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,857 psi | 67% | 2720 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,363 psi | 65% | 2730 fps | 99.1% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 33,823 psi | 56% | 2648 fps | 95.1% |
| Rottweil R 903 | <<locked>> | 80% | 48,008 psi | 79% | 2776 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 43,714 psi | 72% | 2720 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 84% | 38,551 psi | 63% | 2661 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 44,628 psi | 73% | 2710 fps | 98% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,584 psi | 72% | 2687 fps | 99.2% |
| Shooters World SW4350 | <<locked>> | 80% | 41,713 psi | 68% | 2671 fps | 98.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,342 psi | 81% | 2831 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,805 psi | 80% | 2664 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,656 psi | 70% | 2635 fps | 98.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 38,203 psi | 63% | 2654 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 48,254 psi | 79% | 2776 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 44,541 psi | 73% | 2707 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 37,275 psi | 61% | 2648 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 36,637 psi | 60% | 2589 fps | 95.9% |
| Vihtavuori N150 | <<locked>> | 80% | 45,977 psi | 75% | 2697 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,974 psi | 69% | 2687 fps | 99.6% |
| Vihtavuori N165 | <<locked>> | 86% | 36,027 psi | 59% | 2569 fps | 95.2% |
| Vihtavuori N550 | <<locked>> | 80% | 41,466 psi | 68% | 2690 fps | 99.4% |
| Vihtavuori N555 | <<locked>> | 80% | 32,677 psi | 54% | 2546 fps | 98.4% |
| Vihtavuori N560 | 73.8 gr | 90% | 45,179 psi | 74% | 2858 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 96% | 44,454 psi | 73% | 2831 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,988 psi | 67% | 2651 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 42,960 psi | 71% | 2749 fps | 98.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,962 psi | 43% | 2461 fps | 98% |
| Winchester Supreme 780 | <<locked>> | 86% | 38,377 psi | 63% | 2628 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 76 powders for .300 Blaser Mag. loaded with the .308 | 180gr | Sako Hammerhead. Winchester StaBALL HD delivers the highest muzzle velocity at 3,081 fps; across all powders the maximum-charge window runs from 1,821 fps to 3,081 fps. ADI AR 2225 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 1:15.0 twist; slower twists will usually not stabilise this weight. ADI AR 2225, Alliant Reloder-25, Bofors RP15 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 | Sako Hammerhead 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.