Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 165gr | Barnes X FN bullet and 76 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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Max Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 96% | 52,504 psi | 86% | 2979 fps | 99.6% |
| Accurate 4350 | <<locked>> | 88% | 54,186 psi | 89% | 3028 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 52,939 psi | 87% | 3117 fps | 97.2% |
| Accurate MAGPRO | <<locked>> | 96% | 53,737 psi | 88% | 3114 fps | 95.9% |
| ADI AR 2208 | <<locked>> | 82% | 52,547 psi | 86% | 2940 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 53,983 psi | 89% | 3058 fps | 98.1% |
| ADI AR 2213 | <<locked>> | 96% | 51,880 psi | 85% | 3048 fps | 96.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 39,262 psi | 64% | 2835 fps | 96.3% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 54,288 psi | 89% | 3058 fps | 98.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 53,708 psi | 88% | 2966 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 54,099 psi | 89% | 3077 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 51,547 psi | 85% | 3041 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 53,606 psi | 88% | 3048 fps | 98.1% |
| Alliant Reloder-22 | <<locked>> | 98% | 54,853 psi | 90% | 3114 fps | 98.5% |
| Alliant Reloder-23 | <<locked>> | 98% | 52,156 psi | 86% | 3048 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 48,443 psi | 80% | 3035 fps | 99.7% |
| Alliant Reloder-26 | <<locked>> | 94% | 52,156 psi | 86% | 3133 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 53,838 psi | 88% | 3097 fps | 98.2% |
| Bofors RP3 | <<locked>> | 82% | 54,810 psi | 90% | 2986 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 54,853 psi | 90% | 3114 fps | 98.5% |
| Bofors RP7 | <<locked>> | 86% | 53,751 psi | 88% | 2966 fps | 98.8% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 47,979 psi | 79% | 2963 fps | 96.3% |
| Hodgdon H380 | <<locked>> | 82% | 54,694 psi | 90% | 2999 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 52,011 psi | 85% | 3012 fps | 99% |
| Hodgdon H4350 | <<locked>> | 86% | 54,868 psi | 90% | 3025 fps | 98.5% |
| Hodgdon H4831 | <<locked>> | 94% | 51,938 psi | 85% | 2992 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 96% | 54,331 psi | 89% | 3035 fps | 96.4% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 54,534 psi | 90% | 2999 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 47,572 psi | 78% | 3074 fps | 97.8% |
| Hodgdon Superformance | <<locked>> | 86% | 51,648 psi | 85% | 3045 fps | 98.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,941 psi | 61% | 1896 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 54,447 psi | 89% | 2999 fps | 98.9% |
| IMR 4451 Enduron | <<locked>> | 86% | 54,969 psi | 90% | 2989 fps | 99.2% |
| IMR 4831 | <<locked>> | 90% | 54,389 psi | 89% | 3018 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 53,519 psi | 88% | 2982 fps | 96.4% |
| IMR 7828 SSC | <<locked>> | 98% | 53,040 psi | 87% | 3084 fps | 96.9% |
| Lovex S065 | <<locked>> | 86% | 52,518 psi | 86% | 2940 fps | 99.7% |
| Lovex S070 | <<locked>> | 88% | 53,795 psi | 88% | 2986 fps | 99.3% |
| Lovex S071ᴾ | <<locked>> | 100% | 50,241 psi | 82% | 2943 fps | 99.3% |
| Norma 204 | <<locked>> | 88% | 51,764 psi | 85% | 2992 fps | 97.6% |
| Norma MRP | <<locked>> | 96% | 54,534 psi | 90% | 3143 fps | 99.4% |
| Norma URP | <<locked>> | 88% | 52,504 psi | 86% | 3009 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 53,577 psi | 88% | 3104 fps | 97.3% |
| Ramshot Hunter | <<locked>> | 90% | 54,433 psi | 89% | 3061 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 51,692 psi | 85% | 3041 fps | 98.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,710 psi | 62% | 1939 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 54,346 psi | 89% | 2979 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 54,549 psi | 90% | 3091 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 53,534 psi | 88% | 3045 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 51,532 psi | 85% | 3064 fps | 99.9% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 47,747 psi | 78% | 3071 fps | 98.8% |
| Rottweil R 903 | <<locked>> | 84% | 55,042 psi | 90% | 2986 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 52,547 psi | 86% | 2976 fps | 96.8% |
| Rottweil R 905 | <<locked>> | 94% | 53,229 psi | 87% | 3038 fps | 98.2% |
| Rottweil R 907 | <<locked>> | 86% | 53,751 psi | 88% | 2966 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 86% | 52,518 psi | 86% | 2940 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 88% | 53,795 psi | 88% | 2986 fps | 99.3% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 52,301 psi | 86% | 2982 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 54,911 psi | 90% | 2851 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 51,808 psi | 85% | 2887 fps | 98.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 52,765 psi | 87% | 3035 fps | 98.1% |
| Somchem S355 | <<locked>> | 84% | 54,766 psi | 90% | 2979 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 54,157 psi | 89% | 2966 fps | 96.3% |
| Somchem S365 | <<locked>> | 90% | 51,938 psi | 85% | 3012 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 53,998 psi | 89% | 3015 fps | 98.9% |
| Vihtavuori N150 | <<locked>> | 84% | 52,460 psi | 86% | 2897 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 54,157 psi | 89% | 2995 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 53,185 psi | 87% | 2989 fps | 98.5% |
| Vihtavuori N550 | <<locked>> | 88% | 53,563 psi | 88% | 3005 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 54,998 psi | 90% | 3077 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 54,650 psi | 90% | 3130 fps | 96.8% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 50,850 psi | 83% | 3045 fps | 96.3% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 53,461 psi | 88% | 2959 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 52,228 psi | 86% | 3018 fps | 99% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 51,097 psi | 84% | 3176 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 53,548 psi | 88% | 3002 fps | 98% |
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 3100 | <<locked>> | 82% | 33,823 psi | 56% | 2598 fps | 95.5% |
| Accurate 4350 | <<locked>> | 80% | 42,032 psi | 69% | 2808 fps | 99.2% |
| Accurate High Country | 73.6 gr | 90% | 46,296 psi | 76% | 2992 fps | 95.5% |
| Accurate MAGPRO | <<locked>> | 94% | 50,096 psi | 82% | 3048 fps | 95% |
| ADI AR 2208 | <<locked>> | 80% | 49,371 psi | 81% | 2884 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 42,206 psi | 69% | 2828 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 94% | 48,675 psi | 80% | 2989 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 98% | 36,941 psi | 61% | 2769 fps | 95.2% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 42,482 psi | 70% | 2831 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,691 psi | 83% | 2917 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,740 psi | 65% | 2802 fps | 99.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 45,078 psi | 74% | 2930 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 42,090 psi | 69% | 2825 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 90% | 42,656 psi | 70% | 2881 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,269 psi | 50% | 2569 fps | 97.8% |
| Alliant Reloder-25 | <<locked>> | 86% | 31,952 psi | 52% | 2631 fps | 95.1% |
| Alliant Reloder-26 | 67.4 gr | 80% | 32,445 psi | 53% | 2690 fps | 96.4% |
| Bofors RP15 | <<locked>> | 92% | 42,119 psi | 69% | 2867 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 51,619 psi | 85% | 2936 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 42,656 psi | 70% | 2881 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 45,005 psi | 74% | 2802 fps | 97.2% |
| Hodgdon H1000 | <<locked>> | 98% | 44,962 psi | 74% | 2900 fps | 95.4% |
| Hodgdon H380 | <<locked>> | 80% | 51,387 psi | 84% | 2943 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 80% | 43,062 psi | 71% | 2838 fps | 97.4% |
| Hodgdon H4350 | <<locked>> | 80% | 45,730 psi | 75% | 2854 fps | 96.7% |
| Hodgdon H4831 | <<locked>> | 92% | 48,718 psi | 80% | 2933 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 94% | 50,923 psi | 84% | 2976 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,623 psi | 62% | 2690 fps | 99.5% |
| Hodgdon Retumbo | <<locked>> | 96% | 42,032 psi | 69% | 2946 fps | 96% |
| Hodgdon Superformance | <<locked>> | 80% | 42,018 psi | 69% | 2851 fps | 96.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,717 psi | 46% | 1696 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 40,393 psi | 66% | 2726 fps | 96% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,934 psi | 75% | 2825 fps | 97.8% |
| IMR 4831 | <<locked>> | 80% | 40,001 psi | 66% | 2749 fps | 98.9% |
| IMR 4955 Enduron | <<locked>> | 92% | 50,560 psi | 83% | 2930 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 94% | 46,818 psi | 77% | 2966 fps | 95.2% |
| Lovex S065 | <<locked>> | 80% | 44,077 psi | 72% | 2782 fps | 98.6% |
| Lovex S070 | <<locked>> | 80% | 42,482 psi | 70% | 2769 fps | 97.4% |
| Lovex S071 | <<locked>> | 86% | 33,170 psi | 54% | 2582 fps | 95.2% |
| Norma 204 | <<locked>> | 82% | 42,554 psi | 70% | 2812 fps | 95.3% |
| Norma MRP | 68.7 gr | 84% | 36,912 psi | 61% | 2776 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 41,031 psi | 67% | 2789 fps | 99% |
| Ramshot Grand | <<locked>> | 94% | 46,702 psi | 77% | 2972 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 39,653 psi | 65% | 2772 fps | 97.3% |
| Ramshot Magnum | <<locked>> | 92% | 39,378 psi | 65% | 2789 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,311 psi | 46% | 1736 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,111 psi | 84% | 2923 fps | 99.2% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 47,659 psi | 78% | 2976 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 41,365 psi | 68% | 2818 fps | 98.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,711 psi | 65% | 2825 fps | 98.4% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 36,825 psi | 60% | 2802 fps | 95% |
| Rottweil R 903 | <<locked>> | 80% | 48,718 psi | 80% | 2881 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 46,528 psi | 76% | 2861 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 86% | 41,437 psi | 68% | 2808 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 45,005 psi | 74% | 2802 fps | 97.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 44,077 psi | 72% | 2782 fps | 98.6% |
| Shooters World SW4350 | <<locked>> | 80% | 42,482 psi | 70% | 2769 fps | 97.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,168 psi | 81% | 2930 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,965 psi | 80% | 2762 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,221 psi | 71% | 2726 fps | 97.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 41,060 psi | 67% | 2805 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 48,602 psi | 80% | 2877 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 50,763 psi | 83% | 2907 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 37,637 psi | 62% | 2749 fps | 100% |
| Somchem S385 | <<locked>> | 84% | 39,755 psi | 65% | 2740 fps | 95.8% |
| Vihtavuori N150 | <<locked>> | 80% | 46,456 psi | 76% | 2799 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,337 psi | 70% | 2782 fps | 99.1% |
| Vihtavuori N165 | <<locked>> | 88% | 38,856 psi | 64% | 2713 fps | 95% |
| Vihtavuori N550 | <<locked>> | 80% | 41,901 psi | 69% | 2789 fps | 98.9% |
| Vihtavuori N555 | <<locked>> | 80% | 33,765 psi | 55% | 2654 fps | 97.9% |
| Vihtavuori N560 | <<locked>> | 92% | 47,950 psi | 79% | 3002 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 98% | 47,674 psi | 78% | 2986 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,104 psi | 67% | 2743 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 43,279 psi | 71% | 2844 fps | 97.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 27,180 psi | 45% | 2562 fps | 97.4% |
| Winchester Supreme 780 | <<locked>> | 88% | 41,249 psi | 68% | 2769 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 76 powders for .300 Blaser Mag. loaded with the .308 | 165gr | Barnes X FN. Winchester StaBALL HD delivers the highest muzzle velocity at 3,176 fps; across all powders the maximum-charge window runs from 1,896 fps to 3,176 fps. ADI AR 2225 gives the best case fill at 100 %, and 76 of the 76 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (420 MPa), the top charges use 61–90 %, leaving at least 10 % headroom. The 165.0 gr projectile in 0.308" calls for a 1:14.0 twist; slower twists will usually not stabilise this weight. ADI AR 2225, Alliant Reloder-25, Bofors RP15 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 | 165gr | Barnes X FN 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.