Load Specifications
Load data in caliber .300 Blaser Mag. with .308 | 166gr | Hammer Stone Hammer bullet and 89 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 Alliant Reloder-16.
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% | 53,417 psi | 88% | 2881 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 51,706 psi | 85% | 2900 fps | 98.3% |
| Accurate 3100ᴾ | <<locked>> | 100% | 52,663 psi | 86% | 2995 fps | 99.6% |
| Accurate 4064 | <<locked>> | 84% | 53,925 psi | 89% | 2940 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 54,795 psi | 90% | 3051 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 55,013 psi | 90% | 3143 fps | 96.2% |
| ADI AR 2208 | <<locked>> | 86% | 54,650 psi | 90% | 2979 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 52,620 psi | 86% | 3041 fps | 97.8% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 53,838 psi | 88% | 3091 fps | 96.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 53,606 psi | 88% | 3104 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 52,649 psi | 86% | 3035 fps | 97.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 51,750 psi | 85% | 2946 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 51,880 psi | 85% | 2969 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 52,402 psi | 86% | 3058 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 53,519 psi | 88% | 3081 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 51,924 psi | 85% | 3025 fps | 97.8% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 52,605 psi | 86% | 3084 fps | 98.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 49,545 psi | 81% | 3015 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 43,163 psi | 71% | 2933 fps | 99% |
| Alliant Reloder-26 | <<locked>> | 98% | 53,171 psi | 87% | 3159 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 48,240 psi | 79% | 3005 fps | 97.1% |
| Bofors RP3 | <<locked>> | 84% | 52,359 psi | 86% | 2963 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 52,605 psi | 86% | 3084 fps | 98.1% |
| Bofors RP7 | <<locked>> | 88% | 52,083 psi | 86% | 2946 fps | 98.5% |
| Hodgdon H380 | <<locked>> | 84% | 52,895 psi | 87% | 2979 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 90% | 53,664 psi | 88% | 3051 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 88% | 53,606 psi | 88% | 3009 fps | 98.3% |
| Hodgdon H4831 | <<locked>> | 98% | 54,099 psi | 89% | 3035 fps | 96.3% |
| Hodgdon H4831 SC | <<locked>> | 98% | 52,939 psi | 87% | 3015 fps | 96% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 52,562 psi | 86% | 2979 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 54,027 psi | 89% | 3015 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 53,838 psi | 88% | 3087 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,114 psi | 59% | 1877 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 54,882 psi | 90% | 2982 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 54,027 psi | 89% | 2959 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 53,084 psi | 87% | 2940 fps | 99% |
| IMR 4350 | <<locked>> | 92% | 52,982 psi | 87% | 2979 fps | 98.7% |
| IMR 4451 Enduron | <<locked>> | 88% | 53,737 psi | 88% | 2976 fps | 99.1% |
| IMR 4831 | <<locked>> | 92% | 51,953 psi | 85% | 2989 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 53,258 psi | 87% | 2999 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 52,243 psi | 86% | 2966 fps | 96.1% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 51,213 psi | 84% | 3058 fps | 96.4% |
| Lovex S062 | <<locked>> | 84% | 53,983 psi | 89% | 2953 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 53,737 psi | 88% | 2972 fps | 99.7% |
| Lovex S070 | <<locked>> | 92% | 55,071 psi | 90% | 3015 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 43,482 psi | 71% | 2835 fps | 98.3% |
| Norma 203B | <<locked>> | 84% | 54,766 psi | 90% | 3009 fps | 100% |
| Norma 204 | <<locked>> | 92% | 53,635 psi | 88% | 3031 fps | 97.9% |
| Norma MRP | <<locked>> | 98% | 52,127 psi | 86% | 3110 fps | 99.1% |
| Norma URP | <<locked>> | 92% | 53,867 psi | 88% | 3038 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 51,808 psi | 85% | 2979 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 51,561 psi | 85% | 3074 fps | 96.9% |
| Ramshot Hunter | <<locked>> | 92% | 52,562 psi | 86% | 3035 fps | 99.5% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 45,919 psi | 75% | 2940 fps | 97.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,724 psi | 60% | 1919 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 52,939 psi | 87% | 2963 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 52,837 psi | 87% | 3074 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 54,868 psi | 90% | 3074 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 53,461 psi | 88% | 3104 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 42,003 psi | 69% | 2949 fps | 97.2% |
| Rottweil R 902 | <<locked>> | 82% | 52,634 psi | 86% | 2913 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 52,475 psi | 86% | 2959 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 54,418 psi | 89% | 3012 fps | 97.1% |
| Rottweil R 905 | <<locked>> | 98% | 54,665 psi | 90% | 3071 fps | 98.4% |
| Rottweil R 907 | <<locked>> | 88% | 52,083 psi | 86% | 2946 fps | 98.5% |
| Shooters World Long Rifle | <<locked>> | 90% | 53,737 psi | 88% | 2972 fps | 99.7% |
| Shooters World Precision | <<locked>> | 84% | 53,983 psi | 89% | 2953 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 55,071 psi | 90% | 3015 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 54,302 psi | 89% | 3022 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 53,780 psi | 88% | 2844 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 53,301 psi | 88% | 2920 fps | 99.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 54,186 psi | 89% | 3064 fps | 98.3% |
| Somchem S355 | <<locked>> | 86% | 52,649 psi | 86% | 2956 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 52,518 psi | 86% | 2943 fps | 95.9% |
| Somchem S365 | <<locked>> | 94% | 53,026 psi | 87% | 3038 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 51,648 psi | 85% | 2986 fps | 98.5% |
| Vihtavuori N135 | <<locked>> | 82% | 52,895 psi | 87% | 2871 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 53,185 psi | 87% | 2887 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 53,867 psi | 88% | 2930 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 52,402 psi | 86% | 2976 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 51,053 psi | 84% | 2959 fps | 98.1% |
| Vihtavuori N540 | <<locked>> | 84% | 54,969 psi | 90% | 2936 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 55,071 psi | 90% | 3038 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 51,982 psi | 85% | 3041 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 52,533 psi | 86% | 3097 fps | 96.3% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 52,098 psi | 86% | 2946 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 53,882 psi | 88% | 3054 fps | 99.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 44,730 psi | 73% | 3074 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 51,837 psi | 85% | 2979 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% | 50,009 psi | 82% | 2835 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 48,370 psi | 79% | 2841 fps | 97.7% |
| Accurate 3100 | <<locked>> | 88% | 34,432 psi | 57% | 2638 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 47,384 psi | 78% | 2838 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 35,911 psi | 59% | 2690 fps | 97.9% |
| Accurate MAGPRO | <<locked>> | 98% | 51,227 psi | 84% | 3077 fps | 95.3% |
| ADI AR 2208 | <<locked>> | 80% | 45,223 psi | 74% | 2818 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 90% | 43,062 psi | 71% | 2854 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 96% | 46,963 psi | 77% | 2959 fps | 95.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 49,951 psi | 82% | 3038 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 43,178 psi | 71% | 2854 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 45,542 psi | 75% | 2841 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 48,689 psi | 80% | 2913 fps | 100% |
| Alliant Reloder-16 | 60 gr | 80% | 35,375 psi | 58% | 2707 fps | 98% |
| Alliant Reloder-17 | <<locked>> | 80% | 40,103 psi | 66% | 2838 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 90% | 42,685 psi | 70% | 2848 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 94% | 42,931 psi | 70% | 2900 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 25,628 psi | 42% | 2441 fps | 95.3% |
| Alliant Reloder-25 | <<locked>> | 92% | 33,156 psi | 54% | 2680 fps | 95.7% |
| Alliant Reloder-26 | 69.5 gr | 84% | 31,459 psi | 52% | 2680 fps | 95.9% |
| Bofors RP15 | <<locked>> | 96% | 42,134 psi | 69% | 2881 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 45,730 psi | 75% | 2851 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 42,931 psi | 70% | 2900 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 40,350 psi | 66% | 2717 fps | 95.9% |
| Hodgdon H380 | <<locked>> | 80% | 46,093 psi | 76% | 2861 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 80% | 38,130 psi | 63% | 2743 fps | 95.9% |
| Hodgdon H4350 | <<locked>> | 80% | 41,249 psi | 68% | 2772 fps | 95.4% |
| Hodgdon H4831 | <<locked>> | 96% | 50,415 psi | 83% | 2972 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 96% | 49,313 psi | 81% | 2949 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,808 psi | 54% | 2595 fps | 98.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 50,473 psi | 83% | 2959 fps | 100% |
| Hodgdon Superformance | <<locked>> | 80% | 37,188 psi | 61% | 2753 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,050 psi | 44% | 1680 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 51,532 psi | 85% | 2930 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 47,543 psi | 78% | 2851 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 49,879 psi | 82% | 2884 fps | 98.6% |
| IMR 4350 | <<locked>> | 82% | 38,522 psi | 63% | 2697 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,887 psi | 69% | 2753 fps | 96.8% |
| IMR 4831 | <<locked>> | 80% | 34,664 psi | 57% | 2644 fps | 97.6% |
| IMR 4895 | <<locked>> | 80% | 49,966 psi | 82% | 2943 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 49,066 psi | 81% | 2910 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 98% | 47,906 psi | 79% | 2995 fps | 95.5% |
| Lovex S062 | <<locked>> | 80% | 47,543 psi | 78% | 2848 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 39,233 psi | 64% | 2697 fps | 97.5% |
| Lovex S070 | <<locked>> | 80% | 37,347 psi | 61% | 2671 fps | 95.8% |
| Lovex S071 | <<locked>> | 92% | 33,359 psi | 55% | 2612 fps | 95.3% |
| Norma 203B | <<locked>> | 80% | 48,066 psi | 79% | 2897 fps | 100% |
| Norma 204 | <<locked>> | 86% | 43,671 psi | 72% | 2844 fps | 95.6% |
| Norma MRP | 70.7 gr | 88% | 36,579 psi | 60% | 2782 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 35,911 psi | 59% | 2687 fps | 97.8% |
| Ramshot Big Game | <<locked>> | 80% | 48,428 psi | 80% | 2920 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 47,921 psi | 79% | 3005 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 34,882 psi | 57% | 2674 fps | 95.7% |
| Ramshot Magnum | <<locked>> | 96% | 39,450 psi | 65% | 2802 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,499 psi | 45% | 1722 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 46,354 psi | 76% | 2848 fps | 98.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 42,670 psi | 70% | 2897 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,708 psi | 59% | 2707 fps | 97.5% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 34,940 psi | 57% | 2717 fps | 96.8% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 39,160 psi | 64% | 2877 fps | 96.1% |
| Rottweil R 902 | <<locked>> | 80% | 49,400 psi | 81% | 2861 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 42,873 psi | 70% | 2792 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 47,645 psi | 78% | 2894 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 90% | 41,684 psi | 68% | 2828 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 40,350 psi | 66% | 2717 fps | 95.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,233 psi | 64% | 2697 fps | 97.5% |
| Shooters World Precision | <<locked>> | 80% | 47,543 psi | 78% | 2848 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 37,347 psi | 61% | 2671 fps | 95.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 44,266 psi | 73% | 2851 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,454 psi | 73% | 2703 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 38,290 psi | 63% | 2635 fps | 96% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 41,292 psi | 68% | 2822 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 43,424 psi | 71% | 2795 fps | 99.9% |
| Somchem S361 | <<locked>> | 92% | 48,921 psi | 80% | 2881 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 32,430 psi | 53% | 2644 fps | 99.4% |
| Somchem S385 | <<locked>> | 88% | 39,479 psi | 65% | 2749 fps | 95.7% |
| Vihtavuori N135 | <<locked>> | 80% | 49,530 psi | 81% | 2822 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 49,893 psi | 82% | 2838 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 41,350 psi | 68% | 2720 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 37,405 psi | 61% | 2690 fps | 98.1% |
| Vihtavuori N165 | <<locked>> | 92% | 38,827 psi | 64% | 2723 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 48,153 psi | 79% | 2828 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,782 psi | 60% | 2690 fps | 97.8% |
| Vihtavuori N555 | <<locked>> | 80% | 28,021 psi | 46% | 2516 fps | 95.5% |
| Vihtavuori N560 | <<locked>> | 96% | 48,994 psi | 80% | 3031 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,695 psi | 60% | 2664 fps | 99.6% |
| Winchester 760 | <<locked>> | 80% | 38,305 psi | 63% | 2749 fps | 95.9% |
| Winchester StaBALL HD | <<locked>> | 84% | 25,730 psi | 42% | 2526 fps | 96.2% |
| Winchester Supreme 780 | <<locked>> | 92% | 41,698 psi | 68% | 2792 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 89 powders for .300 Blaser Mag. loaded with the .308 | 166gr | Hammer Stone Hammer. Alliant Reloder-26 delivers the highest muzzle velocity at 3,159 fps; across all powders the maximum-charge window runs from 1,877 fps to 3,159 fps. Accurate 3100 gives the best case fill at 100 %, and 89 of the 89 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (420 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 166.0 gr projectile in 0.308" calls for a 1:12.5 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, Alliant Reloder-16 rank at the top here: for .300 Blaser Mag. with the .308 | 166gr | Hammer Stone Hammer 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.