Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 168gr | Sierra MatchKing bullet and 82 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, ReloadSwiss RS 70 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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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% | 53,853 psi | 88% | 2923 fps | 98.8% |
| Accurate 3100 | <<locked>> | 98% | 52,344 psi | 86% | 2972 fps | 99.6% |
| Accurate 4064 | <<locked>> | 82% | 53,403 psi | 88% | 2910 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 54,244 psi | 89% | 3025 fps | 100% |
| Accurate High Country | <<locked>> | 96% | 53,476 psi | 88% | 3120 fps | 97.5% |
| Accurate MAGPRO | <<locked>> | 98% | 54,375 psi | 89% | 3117 fps | 96.4% |
| ADI AR 2208 | <<locked>> | 84% | 53,461 psi | 88% | 2946 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 51,619 psi | 85% | 3009 fps | 97.9% |
| ADI AR 2213 | <<locked>> | 98% | 52,895 psi | 87% | 3061 fps | 97% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 54,157 psi | 89% | 2969 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 54,302 psi | 89% | 2989 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 54,984 psi | 90% | 3084 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 52,547 psi | 86% | 3051 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 54,578 psi | 90% | 3058 fps | 98.4% |
| Alliant Reloder-22 | <<locked>> | 98% | 52,011 psi | 85% | 3058 fps | 98.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 52,504 psi | 86% | 3045 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 45,672 psi | 75% | 2972 fps | 99.5% |
| Alliant Reloder-26 | <<locked>> | 96% | 52,533 psi | 86% | 3130 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 51,010 psi | 84% | 3041 fps | 97.9% |
| Bofors RP3 | <<locked>> | 84% | 55,042 psi | 90% | 2986 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 52,011 psi | 85% | 3058 fps | 98.2% |
| Bofors RP7 | <<locked>> | 88% | 54,520 psi | 90% | 2972 fps | 99% |
| Hodgdon H380 | <<locked>> | 82% | 51,779 psi | 85% | 2943 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 88% | 52,692 psi | 87% | 3018 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 86% | 52,504 psi | 86% | 2976 fps | 98.3% |
| Hodgdon H4831 | <<locked>> | 96% | 52,968 psi | 87% | 3002 fps | 96.3% |
| Hodgdon H4831 SC | <<locked>> | 96% | 51,837 psi | 85% | 2982 fps | 96% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 51,822 psi | 85% | 2949 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 44,599 psi | 73% | 3005 fps | 97.3% |
| Hodgdon Superformance | <<locked>> | 88% | 52,678 psi | 86% | 3051 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,579 psi | 60% | 1877 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 52,939 psi | 87% | 2927 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 52,098 psi | 86% | 2949 fps | 98.8% |
| IMR 4451 Enduron | <<locked>> | 86% | 52,765 psi | 87% | 2946 fps | 99.1% |
| IMR 4831 | <<locked>> | 92% | 54,708 psi | 90% | 3015 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 54,636 psi | 90% | 2992 fps | 96.8% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 54,027 psi | 89% | 3097 fps | 97.3% |
| Lovex S062 | <<locked>> | 82% | 53,113 psi | 87% | 2920 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 52,823 psi | 87% | 2943 fps | 99.7% |
| Lovex S070 | <<locked>> | 90% | 54,056 psi | 89% | 2982 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 46,543 psi | 76% | 2874 fps | 99% |
| Norma 203B | <<locked>> | 82% | 53,606 psi | 88% | 2972 fps | 100% |
| Norma 204 | <<locked>> | 90% | 52,634 psi | 86% | 2999 fps | 97.9% |
| Norma MRP | <<locked>> | 96% | 51,619 psi | 85% | 3084 fps | 99.2% |
| Norma URP | <<locked>> | 90% | 52,910 psi | 87% | 3009 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 54,360 psi | 89% | 2999 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 54,302 psi | 89% | 3110 fps | 97.7% |
| Ramshot Hunter | <<locked>> | 90% | 51,779 psi | 85% | 3009 fps | 99.6% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 48,733 psi | 80% | 2979 fps | 98.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,246 psi | 61% | 1923 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 51,764 psi | 85% | 2930 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 51,880 psi | 85% | 3038 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 54,186 psi | 89% | 3048 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 52,518 psi | 86% | 3074 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 44,773 psi | 74% | 3002 fps | 98.3% |
| Rottweil R 902 | <<locked>> | 82% | 54,940 psi | 90% | 2930 fps | 100% |
| Rottweil R 903 | <<locked>> | 84% | 51,793 psi | 85% | 2930 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 53,374 psi | 88% | 2979 fps | 97.1% |
| Rottweil R 905 | <<locked>> | 96% | 53,795 psi | 88% | 3041 fps | 98.4% |
| Rottweil R 907 | <<locked>> | 88% | 54,520 psi | 90% | 2972 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 88% | 52,823 psi | 87% | 2943 fps | 99.7% |
| Shooters World Precision | <<locked>> | 82% | 53,113 psi | 87% | 2920 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 54,056 psi | 89% | 2982 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 53,316 psi | 88% | 2992 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 52,605 psi | 86% | 2812 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 52,417 psi | 86% | 2890 fps | 99.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 53,330 psi | 88% | 3038 fps | 98.4% |
| Somchem S355 | <<locked>> | 86% | 55,100 psi | 90% | 2976 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 54,940 psi | 90% | 2972 fps | 96.7% |
| Somchem S365 | <<locked>> | 92% | 52,431 psi | 86% | 3012 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 54,491 psi | 89% | 3018 fps | 99.1% |
| Vihtavuori N150 | <<locked>> | 86% | 52,852 psi | 87% | 2897 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 54,998 psi | 90% | 3002 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 53,737 psi | 88% | 2989 fps | 98.7% |
| Vihtavuori N540 | <<locked>> | 82% | 53,722 psi | 88% | 2897 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 54,070 psi | 89% | 3005 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 51,576 psi | 85% | 3018 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 51,880 psi | 85% | 3074 fps | 96.4% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 54,665 psi | 90% | 2966 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 52,910 psi | 87% | 3022 fps | 99.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 47,935 psi | 79% | 3114 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 54,563 psi | 90% | 3012 fps | 98.3% |
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% | 50,488 psi | 83% | 2864 fps | 98.3% |
| Accurate 3100 | <<locked>> | 84% | 32,416 psi | 53% | 2569 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 50,169 psi | 82% | 2861 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,493 psi | 63% | 2733 fps | 98.7% |
| Accurate High Country | <<locked>> | 92% | 46,412 psi | 76% | 2989 fps | 95.8% |
| Accurate MAGPRO | <<locked>> | 96% | 50,531 psi | 83% | 3048 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 47,108 psi | 77% | 2838 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 42,525 psi | 70% | 2831 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 94% | 46,180 psi | 76% | 2933 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,892 psi | 79% | 2867 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,097 psi | 84% | 2936 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,275 psi | 61% | 2740 fps | 98.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 42,366 psi | 70% | 2867 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 42,076 psi | 69% | 2822 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 90% | 39,827 psi | 65% | 2815 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,427 psi | 45% | 2487 fps | 96.7% |
| Alliant Reloder-25 | <<locked>> | 88% | 31,183 psi | 51% | 2612 fps | 95% |
| Alliant Reloder-26 | 67.3 gr | 80% | 29,356 psi | 48% | 2598 fps | 95% |
| Bofors RP15 | <<locked>> | 94% | 41,829 psi | 69% | 2858 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 48,356 psi | 79% | 2877 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 39,827 psi | 65% | 2815 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 42,279 psi | 69% | 2746 fps | 96.7% |
| Hodgdon H380 | <<locked>> | 80% | 48,486 psi | 80% | 2887 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 80% | 40,335 psi | 66% | 2779 fps | 96.8% |
| Hodgdon H4350 | <<locked>> | 80% | 43,323 psi | 71% | 2799 fps | 96.3% |
| Hodgdon H4831 | <<locked>> | 94% | 49,472 psi | 81% | 2943 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 94% | 48,428 psi | 80% | 2920 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,853 psi | 57% | 2628 fps | 99.2% |
| Hodgdon Retumbo | <<locked>> | 96% | 39,276 psi | 64% | 2871 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 39,378 psi | 65% | 2789 fps | 96.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,296 psi | 45% | 1680 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,559 psi | 81% | 2871 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 37,898 psi | 62% | 2667 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,685 psi | 72% | 2776 fps | 97.5% |
| IMR 4831 | <<locked>> | 80% | 36,970 psi | 61% | 2684 fps | 98.4% |
| IMR 4955 Enduron | <<locked>> | 92% | 48,240 psi | 79% | 2881 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 96% | 47,123 psi | 77% | 2966 fps | 95.6% |
| Lovex S062 | <<locked>> | 80% | 49,966 psi | 82% | 2867 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,263 psi | 68% | 2726 fps | 98.2% |
| Lovex S070 | <<locked>> | 80% | 39,537 psi | 65% | 2707 fps | 96.8% |
| Lovex S071 | <<locked>> | 90% | 33,736 psi | 55% | 2602 fps | 95.7% |
| Norma 203B | <<locked>> | 80% | 50,444 psi | 83% | 2923 fps | 100% |
| Norma 204 | <<locked>> | 84% | 43,018 psi | 71% | 2818 fps | 95.6% |
| Norma MRP | 70.2 gr | 86% | 36,390 psi | 60% | 2762 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 38,189 psi | 63% | 2723 fps | 98.5% |
| Ramshot Big Game | <<locked>> | 80% | 50,966 psi | 84% | 2946 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 43,961 psi | 72% | 2910 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 36,985 psi | 61% | 2707 fps | 96.7% |
| Ramshot Magnum | <<locked>> | 94% | 39,044 psi | 64% | 2782 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,804 psi | 46% | 1719 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,530 psi | 80% | 2874 fps | 99% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 45,020 psi | 74% | 2923 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,276 psi | 63% | 2749 fps | 98.4% |
| ReloadSwiss RS 70 | 66.7 gr | 80% | 37,101 psi | 61% | 2756 fps | 97.9% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 36,216 psi | 59% | 2785 fps | 95% |
| Rottweil R 902 | <<locked>> | 80% | 51,634 psi | 85% | 2881 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,440 psi | 75% | 2822 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 46,905 psi | 77% | 2864 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 88% | 41,220 psi | 68% | 2802 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 42,279 psi | 69% | 2746 fps | 96.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,263 psi | 68% | 2726 fps | 98.2% |
| Shooters World Precision | <<locked>> | 80% | 49,966 psi | 82% | 2867 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,537 psi | 65% | 2707 fps | 96.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,528 psi | 76% | 2877 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,586 psi | 76% | 2720 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,393 psi | 66% | 2664 fps | 96.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 40,843 psi | 67% | 2799 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 45,658 psi | 75% | 2818 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 48,196 psi | 79% | 2854 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 34,621 psi | 57% | 2680 fps | 99.8% |
| Somchem S385 | <<locked>> | 86% | 39,233 psi | 64% | 2726 fps | 95.8% |
| Vihtavuori N150 | <<locked>> | 80% | 43,613 psi | 72% | 2746 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 39,610 psi | 65% | 2723 fps | 98.8% |
| Vihtavuori N165 | <<locked>> | 90% | 38,609 psi | 63% | 2703 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 80% | 50,401 psi | 83% | 2848 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 38,972 psi | 64% | 2723 fps | 98.5% |
| Vihtavuori N555 | <<locked>> | 80% | 30,385 psi | 50% | 2569 fps | 96.8% |
| Vihtavuori N560 | <<locked>> | 94% | 48,341 psi | 79% | 3005 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,638 psi | 63% | 2690 fps | 99.8% |
| Winchester 760 | <<locked>> | 80% | 40,524 psi | 67% | 2782 fps | 96.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,250 psi | 40% | 2451 fps | 95.3% |
| Winchester Supreme 780 | <<locked>> | 90% | 41,263 psi | 68% | 2766 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 91 powders for .300 Blaser Mag. loaded with the .308 | 168gr | Sierra MatchKing. Alliant Reloder-26 delivers the highest muzzle velocity at 3,130 fps; across all powders the maximum-charge window runs from 1,877 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 1:13.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-23 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, ReloadSwiss RS 70, Alliant Reloder-26 rank at the top here: for .300 Blaser Mag. with the .308 | 168gr | Sierra MatchKing 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.