Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 168gr | Sellier & Bellot HPBT bullet and 84 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 ReloadSwiss RS 70.
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% | 53,432 psi | 88% | 2910 fps | 98.7% |
| Accurate 3100 | <<locked>> | 98% | 51,503 psi | 85% | 2956 fps | 99.5% |
| Accurate 4064 | <<locked>> | 82% | 52,997 psi | 87% | 2904 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 53,476 psi | 88% | 3009 fps | 100% |
| Accurate MAGPRO | <<locked>> | 98% | 53,548 psi | 88% | 3100 fps | 96.1% |
| ADI AR 2208 | <<locked>> | 84% | 52,953 psi | 87% | 2933 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 54,592 psi | 90% | 3058 fps | 98.3% |
| ADI AR 2213 | <<locked>> | 98% | 52,141 psi | 86% | 3041 fps | 96.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 53,635 psi | 88% | 2956 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 53,766 psi | 88% | 2979 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 54,288 psi | 89% | 3071 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 51,837 psi | 85% | 3035 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 53,998 psi | 89% | 3045 fps | 98.3% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 54,824 psi | 90% | 3104 fps | 98.6% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 51,837 psi | 85% | 3031 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 44,991 psi | 74% | 2956 fps | 99.4% |
| Alliant Reloder-26 | <<locked>> | 96% | 51,619 psi | 85% | 3114 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 50,169 psi | 82% | 3022 fps | 97.7% |
| Bofors RP3 | <<locked>> | 84% | 54,476 psi | 89% | 2972 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 54,824 psi | 90% | 3104 fps | 98.6% |
| Bofors RP7 | <<locked>> | 88% | 53,853 psi | 88% | 2959 fps | 98.9% |
| Hodgdon H380 | <<locked>> | 84% | 54,795 psi | 90% | 2989 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 52,243 psi | 86% | 3009 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 86% | 52,054 psi | 85% | 2966 fps | 98.1% |
| Hodgdon H4831 | <<locked>> | 96% | 52,402 psi | 86% | 2989 fps | 96.1% |
| Hodgdon H4831 SC | <<locked>> | 98% | 54,737 psi | 90% | 3028 fps | 96.6% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 54,737 psi | 90% | 2989 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 44,150 psi | 72% | 2989 fps | 97% |
| Hodgdon Superformance | <<locked>> | 88% | 52,083 psi | 86% | 3041 fps | 99% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,521 psi | 60% | 1873 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 52,388 psi | 86% | 2917 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 54,853 psi | 90% | 2949 fps | 99.3% |
| IMR 4350 | <<locked>> | 92% | 54,911 psi | 90% | 2992 fps | 99.1% |
| IMR 4451 Enduron | <<locked>> | 86% | 52,069 psi | 85% | 2930 fps | 99% |
| IMR 4831 | <<locked>> | 92% | 53,983 psi | 89% | 3002 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 54,099 psi | 89% | 2979 fps | 96.6% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 53,272 psi | 87% | 3077 fps | 97.1% |
| Lovex S062 | <<locked>> | 82% | 52,605 psi | 86% | 2910 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 52,344 psi | 86% | 2930 fps | 99.7% |
| Lovex S070 | <<locked>> | 90% | 53,621 psi | 88% | 2976 fps | 99.3% |
| Lovex S071ᴾ | <<locked>> | 100% | 45,934 psi | 75% | 2861 fps | 98.9% |
| Norma 203B | <<locked>> | 82% | 53,069 psi | 87% | 2963 fps | 100% |
| Norma 204 | <<locked>> | 90% | 52,040 psi | 85% | 2986 fps | 97.7% |
| Norma MRP | <<locked>> | 98% | 54,462 psi | 89% | 3130 fps | 99.4% |
| Norma URP | <<locked>> | 90% | 52,402 psi | 86% | 2995 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 53,882 psi | 88% | 2989 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 53,751 psi | 88% | 3097 fps | 97.5% |
| Ramshot Hunter | <<locked>> | 92% | 54,650 psi | 90% | 3051 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 48,051 psi | 79% | 2963 fps | 98% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,188 psi | 61% | 1916 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 54,723 psi | 90% | 2976 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 55,071 psi | 90% | 3084 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 53,505 psi | 88% | 3035 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 51,909 psi | 85% | 3061 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 44,208 psi | 73% | 2986 fps | 98.1% |
| Rottweil R 902 | <<locked>> | 82% | 54,592 psi | 90% | 2923 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 54,607 psi | 90% | 2969 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 52,750 psi | 87% | 2966 fps | 96.9% |
| Rottweil R 905 | <<locked>> | 96% | 53,098 psi | 87% | 3028 fps | 98.3% |
| Rottweil R 907 | <<locked>> | 88% | 53,853 psi | 88% | 2959 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 88% | 52,344 psi | 86% | 2930 fps | 99.7% |
| Shooters World Precision | <<locked>> | 82% | 52,605 psi | 86% | 2910 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 53,621 psi | 88% | 2976 fps | 99.3% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 52,576 psi | 86% | 2976 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 52,301 psi | 86% | 2805 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 51,793 psi | 85% | 2877 fps | 99% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 52,634 psi | 86% | 3022 fps | 98.2% |
| Somchem S355 | <<locked>> | 86% | 54,578 psi | 90% | 2966 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 54,462 psi | 89% | 2959 fps | 96.5% |
| Somchem S365 | <<locked>> | 92% | 51,721 psi | 85% | 2999 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 53,853 psi | 88% | 3005 fps | 98.9% |
| Vihtavuori N135 | <<locked>> | 82% | 54,853 psi | 90% | 2877 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 54,969 psi | 90% | 2890 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 52,330 psi | 86% | 2887 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 54,302 psi | 89% | 2989 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 53,156 psi | 87% | 2976 fps | 98.6% |
| Vihtavuori N540 | <<locked>> | 82% | 53,243 psi | 87% | 2887 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 53,461 psi | 88% | 2992 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 54,288 psi | 89% | 3058 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 54,708 psi | 90% | 3120 fps | 97% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 53,882 psi | 88% | 2949 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 52,243 psi | 86% | 3009 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 46,949 psi | 77% | 3097 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 53,751 psi | 88% | 2992 fps | 98.1% |
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% | 50,053 psi | 82% | 2854 fps | 98.1% |
| Accurate 3100 | <<locked>> | 86% | 34,185 psi | 56% | 2612 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 49,559 psi | 81% | 2851 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 37,985 psi | 62% | 2717 fps | 98.5% |
| Accurate MAGPRO | <<locked>> | 96% | 49,922 psi | 82% | 3035 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 46,775 psi | 77% | 2828 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 41,959 psi | 69% | 2815 fps | 95.3% |
| ADI AR 2213 | <<locked>> | 96% | 48,849 psi | 80% | 2982 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,355 psi | 78% | 2854 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 50,546 psi | 83% | 2923 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,956 psi | 61% | 2726 fps | 98.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 41,858 psi | 69% | 2858 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 41,669 psi | 68% | 2808 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 92% | 41,858 psi | 69% | 2858 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,064 psi | 44% | 2470 fps | 96.4% |
| Alliant Reloder-25 | <<locked>> | 90% | 32,808 psi | 54% | 2654 fps | 95.8% |
| Alliant Reloder-26 | 68.2 gr | 82% | 31,038 psi | 51% | 2651 fps | 95.9% |
| Bofors RP15 | <<locked>> | 94% | 41,263 psi | 68% | 2844 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 47,790 psi | 78% | 2867 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 41,858 psi | 69% | 2858 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 41,843 psi | 69% | 2730 fps | 96.5% |
| Hodgdon H380 | <<locked>> | 80% | 47,979 psi | 79% | 2874 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 80% | 39,856 psi | 65% | 2766 fps | 96.6% |
| Hodgdon H4350 | <<locked>> | 80% | 42,844 psi | 70% | 2785 fps | 96.1% |
| Hodgdon H4831 | <<locked>> | 94% | 48,936 psi | 80% | 2927 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 96% | 51,300 psi | 84% | 2969 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,505 psi | 57% | 2618 fps | 99.1% |
| Hodgdon Retumbo | <<locked>> | 98% | 41,263 psi | 68% | 2920 fps | 95.9% |
| Hodgdon Superformance | <<locked>> | 80% | 38,827 psi | 64% | 2772 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,311 psi | 45% | 1677 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,211 psi | 81% | 2861 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 51,416 psi | 84% | 2894 fps | 98.9% |
| IMR 4350 | <<locked>> | 80% | 37,623 psi | 62% | 2657 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,395 psi | 71% | 2766 fps | 97.4% |
| IMR 4831 | <<locked>> | 80% | 36,492 psi | 60% | 2667 fps | 98.2% |
| IMR 4955 Enduron | <<locked>> | 92% | 47,674 psi | 78% | 2864 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 96% | 46,586 psi | 76% | 2949 fps | 95.3% |
| Lovex S062 | <<locked>> | 80% | 49,429 psi | 81% | 2858 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,785 psi | 67% | 2710 fps | 98% |
| Lovex S070 | <<locked>> | 80% | 39,073 psi | 64% | 2690 fps | 96.6% |
| Lovex S071 | <<locked>> | 90% | 33,141 psi | 54% | 2585 fps | 95.4% |
| Norma 203B | <<locked>> | 80% | 49,879 psi | 82% | 2910 fps | 100% |
| Norma 204 | <<locked>> | 84% | 42,409 psi | 70% | 2802 fps | 95.4% |
| Norma MRP | 69.4 gr | 86% | 35,853 psi | 59% | 2746 fps | 95% |
| Norma URP | <<locked>> | 80% | 37,695 psi | 62% | 2710 fps | 98.4% |
| Ramshot Big Game | <<locked>> | 80% | 50,212 psi | 82% | 2930 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 46,601 psi | 77% | 2963 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 36,550 psi | 60% | 2697 fps | 96.5% |
| Ramshot Magnum | <<locked>> | 94% | 38,624 psi | 63% | 2766 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,818 psi | 46% | 1716 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,080 psi | 79% | 2861 fps | 98.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 44,512 psi | 73% | 2910 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 37,768 psi | 62% | 2736 fps | 98.2% |
| ReloadSwiss RS 70 | 65.9 gr | 80% | 36,550 psi | 60% | 2740 fps | 97.6% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 38,247 psi | 63% | 2838 fps | 96% |
| Rottweil R 902 | <<locked>> | 80% | 51,329 psi | 84% | 2871 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 44,875 psi | 74% | 2808 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 46,325 psi | 76% | 2848 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 88% | 40,785 psi | 67% | 2789 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 41,843 psi | 69% | 2730 fps | 96.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,785 psi | 67% | 2710 fps | 98% |
| Shooters World Precision | <<locked>> | 80% | 49,429 psi | 81% | 2858 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,073 psi | 64% | 2690 fps | 96.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,021 psi | 76% | 2864 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,064 psi | 76% | 2710 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,943 psi | 66% | 2654 fps | 96.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 40,393 psi | 66% | 2785 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 45,092 psi | 74% | 2805 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 50,836 psi | 83% | 2897 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 34,243 psi | 56% | 2671 fps | 99.8% |
| Somchem S385 | <<locked>> | 86% | 38,841 psi | 64% | 2717 fps | 95.6% |
| Vihtavuori N135 | <<locked>> | 80% | 51,459 psi | 84% | 2828 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 51,619 psi | 85% | 2844 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 43,134 psi | 71% | 2733 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 39,117 psi | 64% | 2710 fps | 98.6% |
| Vihtavuori N165 | <<locked>> | 92% | 40,770 psi | 67% | 2749 fps | 95.8% |
| Vihtavuori N540 | <<locked>> | 80% | 49,908 psi | 82% | 2838 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 38,522 psi | 63% | 2710 fps | 98.4% |
| Vihtavuori N555 | <<locked>> | 80% | 29,936 psi | 49% | 2552 fps | 96.6% |
| Vihtavuori N560 | <<locked>> | 94% | 47,761 psi | 78% | 2989 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,247 psi | 63% | 2677 fps | 99.8% |
| Winchester 760 | <<locked>> | 80% | 40,045 psi | 66% | 2769 fps | 96.7% |
| Winchester StaBALL HD | <<locked>> | 82% | 25,570 psi | 42% | 2503 fps | 96.4% |
| Winchester Supreme 780 | <<locked>> | 90% | 40,698 psi | 67% | 2753 fps | 95% |
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 91 powders for .300 Blaser Mag. loaded with the .308 | 168gr | Sellier & Bellot HPBT. Norma MRP delivers the highest muzzle velocity at 3,130 fps; across all powders the maximum-charge window runs from 1,873 fps to 3,130 fps. ADI AR 2217 gives the best case fill at 100 %, and 91 of the 91 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 168.0 gr projectile in 0.308" calls for a 1:12.5 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, ReloadSwiss RS 70 rank at the top here: for .300 Blaser Mag. with the .308 | 168gr | Sellier & Bellot HPBT they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2217, ADI AR 2225, Baschieri & Pellagri 109 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.