Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 174gr | Prvi Partizan FMJ BT bullet and 83 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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You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2700 | <<locked>> | 82% | 53,708 psi | 88% | 2864 fps | 98.8% |
| Accurate 3100 | <<locked>> | 98% | 51,837 psi | 85% | 2913 fps | 99.7% |
| Accurate 4064 | <<locked>> | 82% | 53,127 psi | 87% | 2848 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 53,751 psi | 88% | 2959 fps | 100% |
| Accurate MAGPRO | <<locked>> | 98% | 53,853 psi | 88% | 3054 fps | 96.4% |
| ADI AR 2208 | <<locked>> | 84% | 53,084 psi | 87% | 2881 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 54,795 psi | 90% | 3009 fps | 98.5% |
| ADI AR 2213 | <<locked>> | 98% | 52,460 psi | 86% | 2999 fps | 97% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 53,809 psi | 88% | 2904 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 54,143 psi | 89% | 2927 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 54,534 psi | 90% | 3018 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 52,127 psi | 86% | 2986 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 54,230 psi | 89% | 2995 fps | 98.5% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 55,027 psi | 90% | 3054 fps | 98.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 52,199 psi | 86% | 2982 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 45,266 psi | 74% | 2910 fps | 99.6% |
| Alliant Reloder-26 | <<locked>> | 96% | 51,924 psi | 85% | 3068 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 50,531 psi | 83% | 2979 fps | 97.9% |
| Bofors RP3 | <<locked>> | 84% | 54,795 psi | 90% | 2923 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 55,027 psi | 90% | 3054 fps | 98.8% |
| Bofors RP7 | <<locked>> | 88% | 54,143 psi | 89% | 2910 fps | 99.1% |
| Hodgdon H380 | <<locked>> | 82% | 51,517 psi | 85% | 2884 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 88% | 52,475 psi | 86% | 2959 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 86% | 52,170 psi | 86% | 2913 fps | 98.3% |
| Hodgdon H4831 | <<locked>> | 96% | 52,489 psi | 86% | 2940 fps | 96.3% |
| Hodgdon H4831 SC | <<locked>> | 98% | 55,071 psi | 90% | 2982 fps | 96.9% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 54,810 psi | 90% | 2936 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 44,280 psi | 73% | 2946 fps | 97.3% |
| Hodgdon Superformance | <<locked>> | 88% | 52,359 psi | 86% | 2992 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,477 psi | 60% | 1831 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 52,678 psi | 86% | 2864 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 55,013 psi | 90% | 2900 fps | 99.4% |
| IMR 4350 | <<locked>> | 90% | 51,866 psi | 85% | 2890 fps | 98.8% |
| IMR 4451 Enduron | <<locked>> | 86% | 52,330 psi | 86% | 2881 fps | 99.1% |
| IMR 4831 | <<locked>> | 92% | 54,331 psi | 89% | 2953 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 54,288 psi | 89% | 2933 fps | 96.9% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 53,417 psi | 88% | 3028 fps | 97.3% |
| Lovex S062 | <<locked>> | 82% | 52,881 psi | 87% | 2858 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 52,649 psi | 86% | 2881 fps | 99.8% |
| Lovex S070 | <<locked>> | 90% | 53,809 psi | 88% | 2923 fps | 99.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 46,122 psi | 76% | 2815 fps | 99% |
| Norma 203B | <<locked>> | 82% | 53,490 psi | 88% | 2913 fps | 100% |
| Norma 204 | <<locked>> | 90% | 52,170 psi | 86% | 2936 fps | 98% |
| Norma MRP | <<locked>> | 98% | 54,737 psi | 90% | 3084 fps | 99.6% |
| Norma URP | <<locked>> | 90% | 52,649 psi | 86% | 2946 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 54,012 psi | 89% | 2940 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 53,838 psi | 88% | 3048 fps | 97.8% |
| Ramshot Hunter | <<locked>> | 92% | 54,839 psi | 90% | 3002 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 48,153 psi | 79% | 2917 fps | 98.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,188 psi | 61% | 1873 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 54,839 psi | 90% | 2923 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 51,561 psi | 85% | 2976 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 53,679 psi | 88% | 2982 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 52,156 psi | 86% | 3009 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 44,367 psi | 73% | 2943 fps | 98.4% |
| Rottweil R 902 | <<locked>> | 82% | 54,650 psi | 90% | 2867 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 54,868 psi | 90% | 2917 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 53,069 psi | 87% | 2920 fps | 97.2% |
| Rottweil R 905 | <<locked>> | 96% | 53,301 psi | 88% | 2979 fps | 98.5% |
| Rottweil R 907 | <<locked>> | 88% | 54,143 psi | 89% | 2910 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 88% | 52,649 psi | 86% | 2881 fps | 99.8% |
| Shooters World Precision | <<locked>> | 82% | 52,881 psi | 87% | 2858 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 53,809 psi | 88% | 2923 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 52,939 psi | 87% | 2927 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 52,344 psi | 86% | 2749 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 52,127 psi | 86% | 2831 fps | 99.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 52,881 psi | 87% | 2972 fps | 98.4% |
| Somchem S355 | <<locked>> | 86% | 54,824 psi | 90% | 2913 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 54,607 psi | 90% | 2910 fps | 96.7% |
| Somchem S365 | <<locked>> | 92% | 52,025 psi | 85% | 2949 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 54,157 psi | 89% | 2956 fps | 99.1% |
| Vihtavuori N135 | <<locked>> | 82% | 55,100 psi | 90% | 2825 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 52,634 psi | 86% | 2838 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 54,563 psi | 90% | 2936 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 53,345 psi | 88% | 2930 fps | 98.8% |
| Vihtavuori N540 | <<locked>> | 82% | 53,461 psi | 88% | 2838 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 53,751 psi | 88% | 2943 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 54,563 psi | 90% | 3009 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 54,969 psi | 90% | 3071 fps | 97.3% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 54,128 psi | 89% | 2900 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 52,475 psi | 86% | 2959 fps | 99.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 47,297 psi | 78% | 3051 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 54,157 psi | 89% | 2949 fps | 98.4% |
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 2700 | <<locked>> | 80% | 50,241 psi | 82% | 2805 fps | 98.4% |
| Accurate 3100 | <<locked>> | 84% | 32,198 psi | 53% | 2516 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 49,821 psi | 82% | 2802 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,290 psi | 63% | 2677 fps | 98.8% |
| Accurate MAGPRO | <<locked>> | 96% | 50,169 psi | 82% | 2989 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 46,978 psi | 77% | 2779 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 42,250 psi | 69% | 2772 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 94% | 45,818 psi | 75% | 2871 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,616 psi | 78% | 2805 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 50,836 psi | 83% | 2874 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,159 psi | 61% | 2684 fps | 98.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 42,090 psi | 69% | 2808 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 41,843 psi | 69% | 2762 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 90% | 39,494 psi | 65% | 2756 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,238 psi | 45% | 2434 fps | 96.9% |
| Alliant Reloder-25 | <<locked>> | 88% | 30,980 psi | 51% | 2559 fps | 95.1% |
| Alliant Reloder-26 | 65.1 gr | 80% | 29,095 psi | 48% | 2546 fps | 95.2% |
| Bofors RP15 | <<locked>> | 94% | 41,553 psi | 68% | 2802 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 47,950 psi | 79% | 2815 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 39,494 psi | 65% | 2756 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 42,061 psi | 69% | 2687 fps | 96.8% |
| Hodgdon H380 | <<locked>> | 80% | 48,327 psi | 79% | 2828 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 80% | 40,045 psi | 66% | 2720 fps | 96.9% |
| Hodgdon H4350 | <<locked>> | 80% | 42,975 psi | 71% | 2740 fps | 96.4% |
| Hodgdon H4831 | <<locked>> | 94% | 49,124 psi | 81% | 2881 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 94% | 48,051 psi | 79% | 2861 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,693 psi | 57% | 2575 fps | 99.3% |
| Hodgdon Retumbo | <<locked>> | 96% | 39,015 psi | 64% | 2815 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 38,957 psi | 64% | 2730 fps | 96.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,267 psi | 45% | 1637 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,429 psi | 81% | 2812 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 51,721 psi | 85% | 2844 fps | 99.1% |
| IMR 4350 | <<locked>> | 80% | 37,710 psi | 62% | 2612 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,453 psi | 71% | 2717 fps | 97.6% |
| IMR 4831 | <<locked>> | 80% | 36,753 psi | 60% | 2628 fps | 98.5% |
| IMR 4955 Enduron | <<locked>> | 92% | 47,950 psi | 79% | 2822 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 96% | 46,818 psi | 77% | 2907 fps | 95.7% |
| Lovex S062 | <<locked>> | 80% | 49,661 psi | 82% | 2808 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,988 psi | 67% | 2667 fps | 98.3% |
| Lovex S070 | <<locked>> | 80% | 39,305 psi | 65% | 2648 fps | 96.9% |
| Lovex S071 | <<locked>> | 90% | 33,388 psi | 55% | 2546 fps | 95.8% |
| Norma 203B | <<locked>> | 80% | 50,198 psi | 82% | 2861 fps | 100% |
| Norma 204 | <<locked>> | 84% | 42,699 psi | 70% | 2759 fps | 95.8% |
| Norma MRP | 67.9 gr | 86% | 36,027 psi | 59% | 2703 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 37,942 psi | 62% | 2667 fps | 98.6% |
| Ramshot Big Game | <<locked>> | 80% | 50,517 psi | 83% | 2884 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 43,482 psi | 71% | 2848 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 36,695 psi | 60% | 2651 fps | 96.8% |
| Ramshot Magnum | <<locked>> | 94% | 38,696 psi | 64% | 2723 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,789 psi | 46% | 1677 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,254 psi | 79% | 2812 fps | 99% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 44,744 psi | 73% | 2864 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 37,985 psi | 62% | 2694 fps | 98.5% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 36,767 psi | 60% | 2697 fps | 97.9% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 35,940 psi | 59% | 2730 fps | 95.2% |
| Rottweil R 902 | <<locked>> | 80% | 51,517 psi | 85% | 2818 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,165 psi | 74% | 2762 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 46,688 psi | 77% | 2808 fps | 95.8% |
| Rottweil R 905 | <<locked>> | 88% | 40,930 psi | 67% | 2746 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 42,061 psi | 69% | 2687 fps | 96.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,988 psi | 67% | 2667 fps | 98.3% |
| Shooters World Precision | <<locked>> | 80% | 49,661 psi | 82% | 2808 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,305 psi | 65% | 2648 fps | 96.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,238 psi | 76% | 2815 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,369 psi | 76% | 2661 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,219 psi | 66% | 2612 fps | 97% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 40,553 psi | 67% | 2740 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 45,339 psi | 74% | 2759 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 47,848 psi | 79% | 2795 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 34,345 psi | 56% | 2625 fps | 99.9% |
| Somchem S385 | <<locked>> | 84% | 36,492 psi | 60% | 2615 fps | 95.1% |
| Vihtavuori N135 | <<locked>> | 80% | 51,880 psi | 85% | 2779 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 43,352 psi | 71% | 2687 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 39,392 psi | 65% | 2667 fps | 98.9% |
| Vihtavuori N165 | <<locked>> | 90% | 38,290 psi | 63% | 2648 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 50,227 psi | 82% | 2789 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 38,812 psi | 64% | 2667 fps | 98.6% |
| Vihtavuori N555 | <<locked>> | 80% | 30,153 psi | 50% | 2513 fps | 97% |
| Vihtavuori N560 | 74.2 gr | 94% | 47,848 psi | 79% | 2943 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,493 psi | 63% | 2635 fps | 99.9% |
| Winchester 760 | <<locked>> | 80% | 40,190 psi | 66% | 2723 fps | 97% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,062 psi | 40% | 2402 fps | 95.5% |
| Winchester Supreme 780 | <<locked>> | 90% | 40,973 psi | 67% | 2710 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 92 powders for .300 Blaser Mag. loaded with the .308 | 174gr | Prvi Partizan FMJ BT. Norma MRP delivers the highest muzzle velocity at 3,084 fps; across all powders the maximum-charge window runs from 1,831 fps to 3,084 fps. ADI AR 2217 gives the best case fill at 100 %, and 92 of the 92 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (420 MPa), the top charges use 52–90 %, leaving at least 10 % headroom. The 174.0 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-22 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 | 174gr | Prvi Partizan FMJ BT they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2217, Baschieri & Pellagri 109, Bofors RP30 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.