Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 168gr | Sierra Tipped MatchKing bullet and 87 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Accurate High Country and Norma MRP.
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 2495 | <<locked>> | 82% | 55,100 psi | 90% | 2877 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 52,750 psi | 87% | 2894 fps | 98.5% |
| Accurate 3100ᴾ | <<locked>> | 100% | 54,186 psi | 89% | 2995 fps | 99.7% |
| Accurate 4064 | <<locked>> | 82% | 52,127 psi | 86% | 2887 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 52,707 psi | 87% | 2995 fps | 100% |
| Accurate High Country | <<locked>> | 96% | 51,750 psi | 85% | 3084 fps | 97% |
| ADI AR 2208 | <<locked>> | 84% | 52,185 psi | 86% | 2917 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 53,751 psi | 88% | 3038 fps | 98.1% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 55,100 psi | 90% | 3091 fps | 97.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 54,926 psi | 90% | 3097 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 53,896 psi | 88% | 3035 fps | 98.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 53,055 psi | 87% | 2943 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 53,214 psi | 87% | 2966 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 53,519 psi | 88% | 3054 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 54,766 psi | 90% | 3077 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 53,156 psi | 87% | 3025 fps | 98.1% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 54,012 psi | 89% | 3087 fps | 98.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 50,966 psi | 84% | 3015 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 44,280 psi | 73% | 2936 fps | 99.3% |
| Alliant Reloder-26 | <<locked>> | 98% | 54,621 psi | 90% | 3159 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 49,400 psi | 81% | 3005 fps | 97.4% |
| Bofors RP3 | <<locked>> | 84% | 53,722 psi | 88% | 2959 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 54,012 psi | 89% | 3087 fps | 98.4% |
| Bofors RP7 | <<locked>> | 88% | 53,156 psi | 87% | 2943 fps | 98.7% |
| Hodgdon H380 | <<locked>> | 84% | 54,099 psi | 89% | 2976 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 54,940 psi | 90% | 3048 fps | 99.4% |
| Hodgdon H4350 | <<locked>> | 88% | 54,636 psi | 90% | 3005 fps | 98.5% |
| Hodgdon H4831 SC | <<locked>> | 98% | 53,925 psi | 89% | 3009 fps | 96.3% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 53,795 psi | 88% | 2972 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 43,279 psi | 71% | 2966 fps | 96.6% |
| Hodgdon Superformance | <<locked>> | 88% | 51,184 psi | 84% | 3022 fps | 98.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,361 psi | 60% | 1864 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 54,984 psi | 90% | 2953 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 54,172 psi | 89% | 2936 fps | 99.2% |
| IMR 4350 | <<locked>> | 92% | 54,041 psi | 89% | 2976 fps | 98.9% |
| IMR 4451 Enduron | <<locked>> | 88% | 54,911 psi | 90% | 2972 fps | 99.2% |
| IMR 4831 | <<locked>> | 92% | 53,272 psi | 87% | 2986 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 54,578 psi | 90% | 2992 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 53,345 psi | 88% | 2963 fps | 96.4% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 52,504 psi | 86% | 3058 fps | 96.8% |
| Lovex S062 | <<locked>> | 82% | 51,996 psi | 85% | 2897 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 54,940 psi | 90% | 2969 fps | 99.8% |
| Lovex S070 | <<locked>> | 90% | 52,953 psi | 87% | 2959 fps | 99.2% |
| Lovex S071ᴾ | <<locked>> | 100% | 45,092 psi | 74% | 2844 fps | 98.7% |
| Norma 203B | <<locked>> | 82% | 52,518 psi | 86% | 2949 fps | 100% |
| Norma 204 | <<locked>> | 92% | 54,839 psi | 90% | 3028 fps | 98.1% |
| Norma MRP | <<locked>> | 98% | 53,592 psi | 88% | 3114 fps | 99.3% |
| Norma URP | <<locked>> | 92% | 55,100 psi | 90% | 3035 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 53,156 psi | 87% | 2976 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 52,808 psi | 87% | 3074 fps | 97.2% |
| Ramshot Hunter | <<locked>> | 92% | 53,766 psi | 88% | 3035 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 47,166 psi | 77% | 2943 fps | 97.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,043 psi | 61% | 1909 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 54,041 psi | 89% | 2959 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 54,244 psi | 89% | 3071 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 52,562 psi | 86% | 3015 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 54,752 psi | 90% | 3104 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 43,265 psi | 71% | 2956 fps | 97.7% |
| Rottweil R 902 | <<locked>> | 82% | 53,780 psi | 88% | 2907 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 53,780 psi | 88% | 2953 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 51,924 psi | 85% | 2946 fps | 96.6% |
| Rottweil R 905 | <<locked>> | 96% | 52,272 psi | 86% | 3009 fps | 98.1% |
| Rottweil R 907 | <<locked>> | 88% | 53,156 psi | 87% | 2943 fps | 98.7% |
| Shooters World Long Rifle | <<locked>> | 90% | 54,940 psi | 90% | 2969 fps | 99.8% |
| Shooters World Precision | <<locked>> | 82% | 51,996 psi | 85% | 2897 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 52,953 psi | 87% | 2959 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 51,851 psi | 85% | 2959 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 54,897 psi | 90% | 2838 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 54,520 psi | 90% | 2917 fps | 99.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 51,808 psi | 85% | 3002 fps | 98% |
| Somchem S355 | <<locked>> | 86% | 53,809 psi | 88% | 2949 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 53,534 psi | 88% | 2940 fps | 96.2% |
| Somchem S365 | <<locked>> | 94% | 54,462 psi | 89% | 3035 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 53,040 psi | 87% | 2986 fps | 98.8% |
| Vihtavuori N135 | <<locked>> | 82% | 54,186 psi | 89% | 2864 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 54,375 psi | 89% | 2881 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 55,027 psi | 90% | 2923 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 53,606 psi | 88% | 2972 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 52,185 psi | 86% | 2956 fps | 98.3% |
| Vihtavuori N540 | <<locked>> | 82% | 52,721 psi | 87% | 2877 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 52,779 psi | 87% | 2979 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 53,330 psi | 88% | 3038 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 53,954 psi | 89% | 3100 fps | 96.7% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 53,084 psi | 87% | 2936 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 51,547 psi | 85% | 2992 fps | 99% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 46,035 psi | 76% | 3077 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 52,968 psi | 87% | 2976 fps | 97.9% |
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 2495 | <<locked>> | 80% | 51,648 psi | 85% | 2828 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 49,400 psi | 81% | 2838 fps | 97.9% |
| Accurate 3100 | <<locked>> | 86% | 33,591 psi | 55% | 2592 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 48,921 psi | 80% | 2838 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 37,420 psi | 61% | 2703 fps | 98.3% |
| Accurate High Country | 73.3 gr | 92% | 44,947 psi | 74% | 2953 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 46,238 psi | 76% | 2815 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 88% | 41,379 psi | 68% | 2795 fps | 95% |
| ADI AR 2213 | <<locked>> | 96% | 48,138 psi | 79% | 2963 fps | 95.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 51,010 psi | 84% | 3035 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 41,553 psi | 68% | 2799 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 46,789 psi | 77% | 2838 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 49,937 psi | 82% | 2910 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,463 psi | 60% | 2713 fps | 98.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 41,350 psi | 68% | 2844 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 41,089 psi | 67% | 2792 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 92% | 41,263 psi | 68% | 2841 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 26,672 psi | 44% | 2454 fps | 96.1% |
| Alliant Reloder-25 | <<locked>> | 90% | 32,242 psi | 53% | 2635 fps | 95.3% |
| Alliant Reloder-26 | 67.3 gr | 82% | 30,516 psi | 50% | 2631 fps | 95.5% |
| Bofors RP15 | <<locked>> | 94% | 40,698 psi | 67% | 2825 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 47,021 psi | 77% | 2851 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 41,263 psi | 68% | 2841 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 41,350 psi | 68% | 2717 fps | 96.3% |
| Hodgdon H380 | <<locked>> | 80% | 47,413 psi | 78% | 2861 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 80% | 39,378 psi | 65% | 2749 fps | 96.4% |
| Hodgdon H4350 | <<locked>> | 80% | 42,192 psi | 69% | 2769 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 96% | 50,546 psi | 83% | 2949 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,982 psi | 56% | 2602 fps | 98.9% |
| Hodgdon Retumbo | <<locked>> | 98% | 40,654 psi | 67% | 2900 fps | 95.5% |
| Hodgdon Superformance | <<locked>> | 80% | 38,261 psi | 63% | 2756 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,238 psi | 45% | 1670 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 48,646 psi | 80% | 2848 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 50,908 psi | 84% | 2877 fps | 98.8% |
| IMR 4350 | <<locked>> | 82% | 39,610 psi | 65% | 2700 fps | 95.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,743 psi | 70% | 2749 fps | 97.1% |
| IMR 4831 | <<locked>> | 80% | 35,969 psi | 59% | 2654 fps | 98% |
| IMR 4895 | <<locked>> | 80% | 51,242 psi | 84% | 2940 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 50,140 psi | 82% | 2907 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 96% | 45,861 psi | 75% | 2930 fps | 95% |
| Lovex S062 | <<locked>> | 80% | 48,849 psi | 80% | 2844 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,292 psi | 66% | 2697 fps | 97.9% |
| Lovex S070 | <<locked>> | 80% | 38,580 psi | 63% | 2677 fps | 96.3% |
| Lovex S071 | <<locked>> | 90% | 32,692 psi | 54% | 2569 fps | 95.1% |
| Norma 203B | <<locked>> | 80% | 49,313 psi | 81% | 2897 fps | 100% |
| Norma 204 | <<locked>> | 84% | 41,771 psi | 69% | 2785 fps | 95.1% |
| Norma MRP | 70.1 gr | 88% | 37,826 psi | 62% | 2792 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 37,159 psi | 61% | 2697 fps | 98.2% |
| Ramshot Big Game | <<locked>> | 80% | 49,516 psi | 81% | 2917 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 45,687 psi | 75% | 2936 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 36,071 psi | 59% | 2680 fps | 96.2% |
| Ramshot Magnum | <<locked>> | 96% | 40,611 psi | 67% | 2808 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,731 psi | 46% | 1709 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,384 psi | 78% | 2844 fps | 98.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 43,947 psi | 72% | 2897 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 37,101 psi | 61% | 2717 fps | 98% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 35,969 psi | 59% | 2720 fps | 97.3% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 37,753 psi | 62% | 2818 fps | 95.5% |
| Rottweil R 902 | <<locked>> | 80% | 50,720 psi | 83% | 2858 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 44,309 psi | 73% | 2795 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 45,730 psi | 75% | 2831 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 88% | 40,118 psi | 66% | 2772 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 41,350 psi | 68% | 2717 fps | 96.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,292 psi | 66% | 2697 fps | 97.9% |
| Shooters World Precision | <<locked>> | 80% | 48,849 psi | 80% | 2844 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 38,580 psi | 63% | 2677 fps | 96.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 45,513 psi | 75% | 2851 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,469 psi | 75% | 2697 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,494 psi | 65% | 2638 fps | 96.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 42,482 psi | 70% | 2825 fps | 95.7% |
| Somchem S355 | <<locked>> | 80% | 44,541 psi | 73% | 2792 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 50,169 psi | 82% | 2881 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 33,547 psi | 55% | 2651 fps | 99.7% |
| Somchem S385 | <<locked>> | 86% | 38,232 psi | 63% | 2700 fps | 95.3% |
| Vihtavuori N135 | <<locked>> | 80% | 50,807 psi | 83% | 2815 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 51,068 psi | 84% | 2831 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 42,569 psi | 70% | 2720 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,595 psi | 63% | 2697 fps | 98.5% |
| Vihtavuori N165 | <<locked>> | 92% | 40,045 psi | 66% | 2730 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 49,400 psi | 81% | 2828 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 38,058 psi | 62% | 2697 fps | 98.2% |
| Vihtavuori N555 | <<locked>> | 80% | 29,428 psi | 48% | 2536 fps | 96.3% |
| Vihtavuori N560 | <<locked>> | 96% | 50,314 psi | 83% | 3035 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,681 psi | 62% | 2664 fps | 99.7% |
| Winchester 760 | <<locked>> | 80% | 39,378 psi | 65% | 2749 fps | 96.4% |
| Winchester StaBALL HD | <<locked>> | 82% | 25,150 psi | 41% | 2484 fps | 95.9% |
| Winchester Supreme 780 | <<locked>> | 92% | 42,931 psi | 70% | 2795 fps | 95.6% |
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 87 powders for .300 Blaser Mag. loaded with the .308 | 168gr | Sierra Tipped MatchKing. Alliant Reloder-26 delivers the highest muzzle velocity at 3,159 fps; across all powders the maximum-charge window runs from 1,864 fps to 3,159 fps. Accurate 3100 gives the best case fill at 100 %, and 87 of the 87 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 168.0 gr projectile in 0.308" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2213, 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, Accurate High Country, Norma MRP rank at the top here: for .300 Blaser Mag. with the .308 | 168gr | Sierra Tipped MatchKing 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.