Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 180gr | Prvi Partizan SP bullet and 76 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Norma MRP and Vihtavuori N560.
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% | 51,590 psi | 85% | 2871 fps | 99.8% |
| Accurate 4350 | <<locked>> | 88% | 53,417 psi | 88% | 2913 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 53,534 psi | 88% | 3015 fps | 96.9% |
| ADI AR 2208 | <<locked>> | 82% | 52,359 psi | 86% | 2835 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 54,288 psi | 89% | 2963 fps | 98.9% |
| ADI AR 2213 | <<locked>> | 96% | 51,837 psi | 85% | 2956 fps | 97.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 38,261 psi | 63% | 2733 fps | 97.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 53,229 psi | 87% | 2854 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 54,114 psi | 89% | 2969 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 51,663 psi | 85% | 2933 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 53,795 psi | 88% | 2953 fps | 98.8% |
| Alliant Reloder-22 | <<locked>> | 98% | 54,926 psi | 90% | 3015 fps | 99.1% |
| Alliant Reloder-23 | <<locked>> | 98% | 52,098 psi | 86% | 2940 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 48,196 psi | 79% | 2933 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 51,924 psi | 85% | 3022 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 53,867 psi | 88% | 2995 fps | 98.9% |
| Bofors RP3 | <<locked>> | 82% | 53,940 psi | 89% | 2867 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 44,034 psi | 72% | 2854 fps | 96.4% |
| Bofors RP5 | <<locked>> | 98% | 54,926 psi | 90% | 3015 fps | 99.1% |
| Bofors RP7 | <<locked>> | 86% | 53,272 psi | 87% | 2861 fps | 99.3% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 47,718 psi | 78% | 2874 fps | 97.4% |
| Hodgdon H380 | <<locked>> | 82% | 54,143 psi | 89% | 2890 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 51,866 psi | 85% | 2910 fps | 99.5% |
| Hodgdon H4350 | <<locked>> | 86% | 54,926 psi | 90% | 2927 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 94% | 51,924 psi | 85% | 2897 fps | 96.8% |
| Hodgdon H4831 SC | <<locked>> | 96% | 54,462 psi | 89% | 2940 fps | 97.4% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 54,592 psi | 90% | 2894 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 47,094 psi | 77% | 2976 fps | 98.7% |
| Hodgdon Superformance | <<locked>> | 86% | 51,663 psi | 85% | 2943 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,724 psi | 60% | 1814 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 55,100 psi | 90% | 2864 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 54,505 psi | 89% | 2900 fps | 99.4% |
| IMR 4451 Enduron | <<locked>> | 86% | 54,737 psi | 90% | 2887 fps | 99.6% |
| IMR 4831 | <<locked>> | 90% | 53,853 psi | 88% | 2907 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 53,650 psi | 88% | 2890 fps | 97.4% |
| IMR 7828 SSC | <<locked>> | 98% | 53,084 psi | 87% | 2992 fps | 97.9% |
| Lovex S065 | <<locked>> | 88% | 55,100 psi | 90% | 2884 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 53,258 psi | 87% | 2881 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 49,139 psi | 81% | 2831 fps | 99.7% |
| Norma 204 | <<locked>> | 90% | 55,114 psi | 90% | 2953 fps | 98.8% |
| Norma MRP | <<locked>> | 96% | 54,723 psi | 90% | 3041 fps | 99.8% |
| Norma URP | <<locked>> | 88% | 52,243 psi | 86% | 2900 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 53,490 psi | 88% | 3009 fps | 98.3% |
| Ramshot Hunter | <<locked>> | 90% | 54,317 psi | 89% | 2953 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 51,474 psi | 85% | 2943 fps | 99.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,449 psi | 61% | 1860 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 53,983 psi | 89% | 2874 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 54,839 psi | 90% | 2979 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 53,345 psi | 88% | 2936 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 51,663 psi | 85% | 2966 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 47,268 psi | 78% | 2976 fps | 99.4% |
| Rottweil R 903 | <<locked>> | 84% | 54,230 psi | 89% | 2867 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 52,388 psi | 86% | 2877 fps | 97.6% |
| Rottweil R 905 | <<locked>> | 94% | 53,026 psi | 87% | 2940 fps | 98.8% |
| Rottweil R 907 | <<locked>> | 86% | 53,272 psi | 87% | 2861 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 88% | 55,100 psi | 90% | 2884 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 53,258 psi | 87% | 2881 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 52,098 psi | 86% | 2874 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 54,650 psi | 90% | 2746 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 54,491 psi | 89% | 2835 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 52,605 psi | 86% | 2933 fps | 98.8% |
| Somchem S355 | <<locked>> | 84% | 54,143 psi | 89% | 2864 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 53,925 psi | 89% | 2871 fps | 97.2% |
| Somchem S365 | <<locked>> | 90% | 51,866 psi | 85% | 2904 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 53,766 psi | 88% | 2913 fps | 99.4% |
| Vihtavuori N150 | <<locked>> | 84% | 51,938 psi | 85% | 2789 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 54,041 psi | 89% | 2890 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 53,069 psi | 87% | 2890 fps | 99.1% |
| Vihtavuori N550 | <<locked>> | 88% | 53,243 psi | 87% | 2897 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 54,694 psi | 90% | 2966 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 54,781 psi | 90% | 3031 fps | 97.8% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 50,270 psi | 83% | 2940 fps | 97.1% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 53,476 psi | 88% | 2854 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 52,069 psi | 85% | 2917 fps | 99.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 51,895 psi | 85% | 3068 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 53,548 psi | 88% | 2907 fps | 98.7% |
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% | 30,023 psi | 49% | 2425 fps | 95% |
| Accurate 4350 | <<locked>> | 80% | 40,654 psi | 67% | 2690 fps | 99.5% |
| Accurate MAGPRO | <<locked>> | 92% | 46,456 psi | 76% | 2884 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 49,211 psi | 81% | 2782 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 39,015 psi | 64% | 2667 fps | 95.3% |
| ADI AR 2213 | <<locked>> | 92% | 45,411 psi | 75% | 2835 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 96% | 33,736 psi | 55% | 2612 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,009 psi | 82% | 2805 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,247 psi | 64% | 2700 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 44,744 psi | 73% | 2822 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 38,914 psi | 64% | 2664 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 88% | 39,189 psi | 64% | 2717 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,906 psi | 47% | 2454 fps | 98.2% |
| Alliant Reloder-25 | <<locked>> | 86% | 30,821 psi | 51% | 2526 fps | 95.9% |
| Alliant Reloder-26 | 66.8 gr | 80% | 31,009 psi | 51% | 2572 fps | 96.9% |
| Bofors RP15 | <<locked>> | 90% | 38,870 psi | 64% | 2707 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 50,662 psi | 83% | 2822 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 41,292 psi | 68% | 2795 fps | 95.6% |
| Bofors RP5 | <<locked>> | 88% | 39,189 psi | 64% | 2717 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 44,121 psi | 72% | 2697 fps | 97.9% |
| Hodgdon H1000 | <<locked>> | 96% | 41,582 psi | 68% | 2746 fps | 95.6% |
| Hodgdon H380 | <<locked>> | 80% | 50,662 psi | 83% | 2831 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 42,424 psi | 70% | 2736 fps | 98% |
| Hodgdon H4350 | <<locked>> | 80% | 45,310 psi | 74% | 2756 fps | 97.5% |
| Hodgdon H4831 | <<locked>> | 90% | 45,484 psi | 75% | 2782 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 92% | 47,659 psi | 78% | 2822 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,912 psi | 61% | 2585 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 94% | 38,885 psi | 64% | 2785 fps | 96.1% |
| Hodgdon Superformance | <<locked>> | 80% | 41,321 psi | 68% | 2749 fps | 97.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,543 psi | 45% | 1624 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,793 psi | 85% | 2812 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 39,682 psi | 65% | 2625 fps | 96.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,469 psi | 75% | 2723 fps | 98.5% |
| IMR 4831 | <<locked>> | 80% | 38,928 psi | 64% | 2638 fps | 99.3% |
| IMR 4955 Enduron | <<locked>> | 88% | 44,367 psi | 73% | 2723 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 92% | 43,395 psi | 71% | 2808 fps | 95.4% |
| Lovex S065 | <<locked>> | 80% | 43,047 psi | 71% | 2674 fps | 99% |
| Lovex S070 | <<locked>> | 80% | 41,350 psi | 68% | 2661 fps | 97.9% |
| Lovex S071 | <<locked>> | 86% | 31,401 psi | 52% | 2461 fps | 95.6% |
| Norma 204 | <<locked>> | 80% | 39,305 psi | 65% | 2654 fps | 95.3% |
| Norma MRP | 66.5 gr | 82% | 33,504 psi | 55% | 2605 fps | 95% |
| Norma URP | <<locked>> | 80% | 40,161 psi | 66% | 2680 fps | 99.3% |
| Ramshot Grand | <<locked>> | 92% | 43,236 psi | 71% | 2815 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 38,972 psi | 64% | 2671 fps | 98% |
| Ramshot Magnum | <<locked>> | 90% | 35,781 psi | 59% | 2625 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,079 psi | 46% | 1663 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 50,647 psi | 83% | 2818 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 47,514 psi | 78% | 2867 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,495 psi | 66% | 2710 fps | 99.3% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 38,885 psi | 64% | 2717 fps | 99% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 35,636 psi | 59% | 2700 fps | 96% |
| Rottweil R 903 | <<locked>> | 80% | 47,601 psi | 78% | 2766 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 43,236 psi | 71% | 2710 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 84% | 38,058 psi | 62% | 2648 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 44,121 psi | 72% | 2697 fps | 97.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,047 psi | 71% | 2674 fps | 99% |
| Shooters World SW4350 | <<locked>> | 80% | 41,350 psi | 68% | 2661 fps | 97.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 48,776 psi | 80% | 2822 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,385 psi | 79% | 2657 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,163 psi | 69% | 2621 fps | 98% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 37,710 psi | 62% | 2641 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 47,674 psi | 78% | 2762 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 47,268 psi | 78% | 2756 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 36,724 psi | 60% | 2638 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 36,187 psi | 59% | 2575 fps | 95.6% |
| Vihtavuori N150 | <<locked>> | 80% | 45,600 psi | 75% | 2690 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,611 psi | 68% | 2677 fps | 99.5% |
| Vihtavuori N165 | <<locked>> | 86% | 35,592 psi | 58% | 2556 fps | 95% |
| Vihtavuori N550 | <<locked>> | 80% | 40,944 psi | 67% | 2677 fps | 99.3% |
| Vihtavuori N555 | <<locked>> | 80% | 32,271 psi | 53% | 2536 fps | 98.2% |
| Vihtavuori N560 | 73 gr | 90% | 44,570 psi | 73% | 2844 fps | 95.3% |
| Vihtavuori N565 | <<locked>> | 96% | 43,830 psi | 72% | 2818 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,553 psi | 67% | 2641 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 42,627 psi | 70% | 2740 fps | 98.1% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,614 psi | 42% | 2441 fps | 97.7% |
| Winchester Supreme 780 | <<locked>> | 86% | 37,956 psi | 62% | 2615 fps | 95.1% |
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 | Prvi Partizan SP. Winchester StaBALL HD delivers the highest muzzle velocity at 3,068 fps; across all powders the maximum-charge window runs from 1,814 fps to 3,068 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 1:14.0 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. Alliant Reloder-26, Norma MRP, Vihtavuori N560 rank at the top here: for .300 Blaser Mag. with the .308 | 180gr | Prvi Partizan SP 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.