Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 168gr | Barnes TSX BT bullet and 90 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 Hodgdon H414.
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% | 53,011 psi | 87% | 2858 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 55,042 psi | 90% | 2936 fps | 98.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 52,402 psi | 86% | 2972 fps | 99.6% |
| Accurate 4064 | <<locked>> | 84% | 53,548 psi | 88% | 2913 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 54,563 psi | 90% | 3028 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 54,824 psi | 90% | 3120 fps | 96.2% |
| ADI AR 2208 | <<locked>> | 86% | 54,346 psi | 89% | 2956 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 52,257 psi | 86% | 3015 fps | 97.8% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 53,606 psi | 88% | 3068 fps | 96.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 53,563 psi | 88% | 3081 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 55,013 psi | 90% | 2979 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 51,764 psi | 85% | 2946 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 52,170 psi | 86% | 3035 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 53,098 psi | 87% | 3058 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 51,634 psi | 85% | 3002 fps | 97.8% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 52,301 psi | 86% | 3061 fps | 98.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 49,226 psi | 81% | 2992 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,946 psi | 71% | 2910 fps | 99% |
| Alliant Reloder-26 | <<locked>> | 98% | 52,736 psi | 87% | 3133 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 47,761 psi | 78% | 2976 fps | 97% |
| Bofors RP3 | <<locked>> | 84% | 52,054 psi | 85% | 2936 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 52,301 psi | 86% | 3061 fps | 98.1% |
| Bofors RP7 | <<locked>> | 88% | 51,793 psi | 85% | 2920 fps | 98.5% |
| Hodgdon H380 | <<locked>> | 84% | 52,591 psi | 86% | 2956 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 90% | 53,505 psi | 88% | 3028 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 88% | 53,388 psi | 88% | 2986 fps | 98.3% |
| Hodgdon H4831 | <<locked>> | 98% | 53,621 psi | 88% | 3005 fps | 96.2% |
| Hodgdon H4831 SC | <<locked>> | 98% | 52,678 psi | 86% | 2989 fps | 96% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 52,315 psi | 86% | 2956 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 53,954 psi | 89% | 2995 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 53,534 psi | 88% | 3064 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,187 psi | 59% | 1860 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 54,766 psi | 90% | 2959 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 53,679 psi | 88% | 2936 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 52,968 psi | 87% | 2917 fps | 99% |
| IMR 4350 | <<locked>> | 92% | 52,823 psi | 87% | 2956 fps | 98.7% |
| IMR 4451 Enduron | <<locked>> | 88% | 53,722 psi | 88% | 2956 fps | 99.1% |
| IMR 4831 | <<locked>> | 94% | 55,027 psi | 90% | 3018 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 53,127 psi | 87% | 2972 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 51,909 psi | 85% | 2940 fps | 96% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 50,937 psi | 84% | 3035 fps | 96.4% |
| Lovex S062 | <<locked>> | 84% | 53,867 psi | 88% | 2930 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 53,490 psi | 88% | 2949 fps | 99.7% |
| Lovex S070 | <<locked>> | 92% | 54,607 psi | 90% | 2989 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 43,149 psi | 71% | 2812 fps | 98.3% |
| Norma 201 | <<locked>> | 82% | 54,955 psi | 90% | 2936 fps | 100% |
| Norma 203B | <<locked>> | 84% | 54,433 psi | 89% | 2986 fps | 100% |
| Norma 204 | <<locked>> | 92% | 53,519 psi | 88% | 3012 fps | 97.9% |
| Norma MRP | <<locked>> | 98% | 51,866 psi | 85% | 3087 fps | 99.1% |
| Norma URP | <<locked>> | 92% | 53,432 psi | 88% | 3012 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 51,779 psi | 85% | 2956 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 51,155 psi | 84% | 3048 fps | 96.8% |
| Ramshot Hunter | <<locked>> | 92% | 52,402 psi | 86% | 3012 fps | 99.5% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 45,542 psi | 75% | 2913 fps | 97.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,811 psi | 60% | 1906 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 52,707 psi | 87% | 2940 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 52,576 psi | 86% | 3048 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 54,491 psi | 89% | 3051 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 53,388 psi | 88% | 3084 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 41,887 psi | 69% | 2927 fps | 97.2% |
| Rottweil R 902 | <<locked>> | 82% | 52,460 psi | 86% | 2890 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 52,127 psi | 86% | 2933 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 54,085 psi | 89% | 2986 fps | 97.1% |
| Rottweil R 905 | <<locked>> | 98% | 54,360 psi | 89% | 3045 fps | 98.4% |
| Rottweil R 907 | <<locked>> | 88% | 51,793 psi | 85% | 2920 fps | 98.5% |
| Shooters World Long Rifle | <<locked>> | 90% | 53,490 psi | 88% | 2949 fps | 99.7% |
| Shooters World Precision | <<locked>> | 84% | 53,867 psi | 88% | 2930 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 54,607 psi | 90% | 2989 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 54,056 psi | 89% | 2999 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 54,969 psi | 90% | 2969 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 53,664 psi | 88% | 2822 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 53,098 psi | 87% | 2897 fps | 99.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 53,882 psi | 88% | 3041 fps | 98.3% |
| Somchem S355 | <<locked>> | 86% | 52,315 psi | 86% | 2930 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 52,257 psi | 86% | 2920 fps | 95.8% |
| Somchem S365 | <<locked>> | 94% | 52,576 psi | 86% | 3012 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 54,998 psi | 90% | 3022 fps | 99% |
| Vihtavuori N135 | <<locked>> | 82% | 52,649 psi | 86% | 2848 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 52,997 psi | 87% | 2864 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 53,577 psi | 88% | 2907 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 52,199 psi | 86% | 2953 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 50,807 psi | 83% | 2936 fps | 98.1% |
| Vihtavuori N540 | <<locked>> | 84% | 54,665 psi | 90% | 2910 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 54,694 psi | 90% | 3012 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 51,590 psi | 85% | 3015 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 52,286 psi | 86% | 3074 fps | 96.3% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 51,808 psi | 85% | 2920 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 53,505 psi | 88% | 3028 fps | 99.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 44,309 psi | 73% | 3048 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 51,590 psi | 85% | 2956 fps | 97.7% |
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 2495 | <<locked>> | 80% | 49,792 psi | 82% | 2808 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 48,066 psi | 79% | 2815 fps | 97.7% |
| Accurate 3100 | <<locked>> | 88% | 34,389 psi | 56% | 2621 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 47,210 psi | 78% | 2815 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 35,752 psi | 59% | 2671 fps | 97.9% |
| Accurate MAGPRO | <<locked>> | 98% | 50,763 psi | 83% | 3051 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 45,020 psi | 74% | 2795 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 90% | 42,888 psi | 70% | 2831 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 96% | 46,702 psi | 77% | 2936 fps | 95% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 49,632 psi | 81% | 3015 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 45,368 psi | 74% | 2818 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 48,530 psi | 80% | 2890 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 35,201 psi | 58% | 2684 fps | 98% |
| Alliant Reloder-17 | <<locked>> | 80% | 39,798 psi | 65% | 2815 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 90% | 42,511 psi | 70% | 2828 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 94% | 42,612 psi | 70% | 2874 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 25,512 psi | 42% | 2421 fps | 95.3% |
| Alliant Reloder-25 | <<locked>> | 92% | 33,040 psi | 54% | 2661 fps | 95.7% |
| Alliant Reloder-26 | 68.6 gr | 84% | 31,270 psi | 51% | 2661 fps | 95.9% |
| Bofors RP15 | <<locked>> | 96% | 41,829 psi | 69% | 2858 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 45,353 psi | 74% | 2825 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 42,612 psi | 70% | 2874 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 40,190 psi | 66% | 2694 fps | 95.9% |
| Hodgdon H380 | <<locked>> | 80% | 45,948 psi | 75% | 2838 fps | 99.4% |
| Hodgdon H414 | 62.4 gr | 80% | 38,014 psi | 62% | 2723 fps | 95.9% |
| Hodgdon H4350 | <<locked>> | 80% | 40,944 psi | 67% | 2746 fps | 95.3% |
| Hodgdon H4831 | <<locked>> | 96% | 50,154 psi | 82% | 2946 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 96% | 49,052 psi | 81% | 2927 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,634 psi | 54% | 2575 fps | 98.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 50,343 psi | 83% | 2936 fps | 100% |
| Hodgdon Superformance | <<locked>> | 80% | 36,970 psi | 61% | 2726 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,006 psi | 44% | 1663 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 51,387 psi | 84% | 2907 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 47,355 psi | 78% | 2828 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 49,719 psi | 82% | 2861 fps | 98.6% |
| IMR 4350 | <<locked>> | 82% | 38,392 psi | 63% | 2674 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,597 psi | 68% | 2726 fps | 96.8% |
| IMR 4831 | <<locked>> | 80% | 34,519 psi | 57% | 2625 fps | 97.6% |
| IMR 4895 | <<locked>> | 80% | 49,806 psi | 82% | 2920 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 48,747 psi | 80% | 2884 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 98% | 47,659 psi | 78% | 2969 fps | 95.5% |
| Lovex S062 | <<locked>> | 80% | 47,369 psi | 78% | 2825 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 39,073 psi | 64% | 2674 fps | 97.5% |
| Lovex S070 | <<locked>> | 80% | 37,188 psi | 61% | 2651 fps | 95.8% |
| Lovex S071 | <<locked>> | 92% | 33,141 psi | 54% | 2589 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 51,764 psi | 85% | 2887 fps | 100% |
| Norma 203B | <<locked>> | 80% | 47,906 psi | 79% | 2877 fps | 100% |
| Norma 204 | <<locked>> | 86% | 43,468 psi | 71% | 2825 fps | 95.6% |
| Norma MRP | 69.8 gr | 88% | 36,419 psi | 60% | 2762 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 35,752 psi | 59% | 2667 fps | 97.8% |
| Ramshot Big Game | <<locked>> | 80% | 48,138 psi | 79% | 2897 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 47,500 psi | 78% | 2979 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 34,780 psi | 57% | 2654 fps | 95.7% |
| Ramshot Magnum | <<locked>> | 96% | 39,262 psi | 64% | 2779 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,456 psi | 45% | 1706 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 46,064 psi | 76% | 2822 fps | 98.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 42,351 psi | 70% | 2874 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,607 psi | 58% | 2690 fps | 97.6% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 34,722 psi | 57% | 2694 fps | 96.8% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 38,870 psi | 64% | 2851 fps | 96% |
| Rottweil R 902 | <<locked>> | 80% | 49,168 psi | 81% | 2838 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 42,685 psi | 70% | 2769 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 47,485 psi | 78% | 2867 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 90% | 41,452 psi | 68% | 2805 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 40,190 psi | 66% | 2694 fps | 95.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,073 psi | 64% | 2674 fps | 97.5% |
| Shooters World Precision | <<locked>> | 80% | 47,369 psi | 78% | 2825 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 37,188 psi | 61% | 2651 fps | 95.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 44,135 psi | 72% | 2831 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 51,619 psi | 85% | 2917 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,425 psi | 73% | 2684 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 38,174 psi | 63% | 2615 fps | 96% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 41,089 psi | 67% | 2802 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 43,236 psi | 71% | 2772 fps | 99.9% |
| Somchem S361 | <<locked>> | 92% | 48,863 psi | 80% | 2861 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 32,111 psi | 53% | 2618 fps | 99.4% |
| Somchem S385 | <<locked>> | 88% | 39,276 psi | 64% | 2726 fps | 95.6% |
| Vihtavuori N135 | <<locked>> | 80% | 49,487 psi | 81% | 2802 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 49,705 psi | 82% | 2815 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 41,191 psi | 68% | 2700 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 37,246 psi | 61% | 2671 fps | 98.1% |
| Vihtavuori N165 | <<locked>> | 92% | 38,711 psi | 64% | 2703 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 48,037 psi | 79% | 2808 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,651 psi | 60% | 2667 fps | 97.8% |
| Vihtavuori N555 | <<locked>> | 80% | 27,862 psi | 46% | 2497 fps | 95.5% |
| Vihtavuori N560 | <<locked>> | 96% | 48,762 psi | 80% | 3009 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,492 psi | 60% | 2641 fps | 99.5% |
| Winchester 760 | <<locked>> | 80% | 38,014 psi | 62% | 2723 fps | 95.9% |
| Winchester StaBALL HD | <<locked>> | 84% | 25,570 psi | 42% | 2507 fps | 96.2% |
| Winchester Supreme 780 | <<locked>> | 92% | 41,597 psi | 68% | 2772 fps | 95.2% |
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 97 powders for .300 Blaser Mag. loaded with the .308 | 168gr | Barnes TSX BT. Alliant Reloder-26 delivers the highest muzzle velocity at 3,133 fps; across all powders the maximum-charge window runs from 1,860 fps to 3,133 fps. Accurate 3100 gives the best case fill at 100 %, and 97 of the 97 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (420 MPa), the top charges use 56–90 %, 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, Accurate MAGPRO, ADI AR 2213 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, Hodgdon H414 rank at the top here: for .300 Blaser Mag. with the .308 | 168gr | Barnes TSX BT 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.