Load Specifications
Load data in caliber 7 mm Blaser Mag. with .284 | 150gr | Sierra GameKing bullet and 72 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester StaBALL HD, Vihtavuori N560 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.
A valid access license is required to use the Personalized Load Calculator.
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 3100 | <<locked>> | 94% | 53,185 psi | 87% | 2956 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 54,621 psi | 90% | 2992 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 51,474 psi | 85% | 3041 fps | 97% |
| ADI AR 2209 | <<locked>> | 90% | 51,721 psi | 85% | 2986 fps | 98.9% |
| ADI AR 2213 | <<locked>> | 94% | 52,997 psi | 87% | 3048 fps | 98.3% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 47,427 psi | 78% | 2933 fps | 97.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 42,192 psi | 69% | 2894 fps | 99% |
| Alliant Reloder-16 | <<locked>> | 86% | 51,735 psi | 85% | 2992 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 52,736 psi | 87% | 3009 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 54,781 psi | 90% | 3031 fps | 99.3% |
| Alliant Reloder-22 | <<locked>> | 94% | 52,866 psi | 87% | 3041 fps | 99.2% |
| Alliant Reloder-23 | <<locked>> | 96% | 53,983 psi | 89% | 3018 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 53,185 psi | 87% | 3077 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 54,128 psi | 89% | 3107 fps | 100% |
| Bofors RP15 | <<locked>> | 96% | 52,098 psi | 86% | 3028 fps | 99% |
| Bofors RP30ᴾ | <<locked>> | 100% | 49,226 psi | 81% | 3009 fps | 98.2% |
| Bofors RP5 | <<locked>> | 94% | 52,866 psi | 87% | 3041 fps | 99.2% |
| Bofors RP7 | <<locked>> | 84% | 53,664 psi | 88% | 2936 fps | 99.6% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 52,286 psi | 86% | 3028 fps | 98.9% |
| Hodgdon H414 | <<locked>> | 84% | 52,678 psi | 86% | 2989 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 82% | 51,924 psi | 85% | 2943 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 92% | 53,084 psi | 87% | 2986 fps | 97.6% |
| Hodgdon H4831 SC | <<locked>> | 92% | 51,866 psi | 85% | 2963 fps | 97.4% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 52,083 psi | 86% | 2917 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 52,141 psi | 86% | 3143 fps | 99.7% |
| Hodgdon Superformance | <<locked>> | 84% | 52,663 psi | 86% | 3022 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,898 psi | 61% | 1883 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 51,721 psi | 85% | 2920 fps | 99.4% |
| IMR 4451 Enduron | <<locked>> | 82% | 51,663 psi | 85% | 2904 fps | 99.6% |
| IMR 4831 | <<locked>> | 88% | 54,897 psi | 90% | 2982 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 54,128 psi | 89% | 2969 fps | 98% |
| IMR 7828 SSC | <<locked>> | 96% | 54,433 psi | 89% | 3084 fps | 98.6% |
| Lovex S065 | <<locked>> | 84% | 52,359 psi | 86% | 2907 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 53,867 psi | 88% | 2956 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 54,172 psi | 89% | 2969 fps | 100% |
| Norma 204 | <<locked>> | 86% | 52,359 psi | 86% | 2972 fps | 98.8% |
| Norma 217ᴾ | <<locked>> | 100% | 37,739 psi | 62% | 2812 fps | 97.1% |
| Norma MRP | <<locked>> | 92% | 52,562 psi | 86% | 3064 fps | 99.8% |
| Norma URP | <<locked>> | 86% | 53,113 psi | 87% | 2976 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 55,013 psi | 90% | 3104 fps | 99% |
| Ramshot Hunter | <<locked>> | 86% | 51,924 psi | 85% | 2976 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 98% | 53,301 psi | 88% | 3035 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,768 psi | 62% | 1929 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 54,375 psi | 89% | 3012 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 52,591 psi | 86% | 3038 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 52,707 psi | 87% | 3143 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 47,718 psi | 78% | 3015 fps | 96.4% |
| Rottweil R 903 | <<locked>> | 82% | 54,795 psi | 90% | 2940 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 53,011 psi | 87% | 2956 fps | 98.2% |
| Rottweil R 905 | <<locked>> | 92% | 54,230 psi | 89% | 3022 fps | 99.3% |
| Rottweil R 907 | <<locked>> | 84% | 53,664 psi | 88% | 2936 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 84% | 52,359 psi | 86% | 2907 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 53,867 psi | 88% | 2956 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 54,752 psi | 90% | 2808 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 54,969 psi | 90% | 2910 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 53,795 psi | 88% | 3015 fps | 99.2% |
| Somchem S355 | <<locked>> | 82% | 54,607 psi | 90% | 2933 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 54,534 psi | 90% | 2946 fps | 97.8% |
| Somchem S365 | <<locked>> | 88% | 53,301 psi | 88% | 2979 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 54,723 psi | 90% | 2992 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 82% | 52,257 psi | 86% | 2854 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 54,926 psi | 90% | 2966 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 54,273 psi | 89% | 2972 fps | 99.5% |
| Vihtavuori N550 | <<locked>> | 86% | 53,983 psi | 89% | 2972 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 52,779 psi | 87% | 2995 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 52,533 psi | 86% | 3058 fps | 97.8% |
| Vihtavuori N565 | <<locked>> | 98% | 52,301 psi | 86% | 3035 fps | 98% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 48,979 psi | 80% | 3025 fps | 96.1% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 54,273 psi | 89% | 2923 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 52,881 psi | 87% | 2992 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 98% | 55,085 psi | 90% | 3156 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 54,679 psi | 90% | 2989 fps | 99.2% |
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>> | 80% | 33,040 psi | 54% | 2552 fps | 96.7% |
| Accurate 4350 | <<locked>> | 80% | 44,367 psi | 73% | 2818 fps | 99.9% |
| Accurate MAGPRO | <<locked>> | 88% | 44,657 psi | 73% | 2907 fps | 95.2% |
| ADI AR 2209 | <<locked>> | 80% | 37,115 psi | 61% | 2684 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 88% | 43,265 psi | 71% | 2854 fps | 95.9% |
| ADI AR 2217 | <<locked>> | 96% | 41,655 psi | 68% | 2812 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 92% | 32,663 psi | 54% | 2641 fps | 95.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 42,540 psi | 70% | 2825 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 48,950 psi | 80% | 2946 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 37,086 psi | 61% | 2680 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 84% | 37,797 psi | 62% | 2740 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 31,633 psi | 52% | 2582 fps | 99.3% |
| Alliant Reloder-25 | <<locked>> | 82% | 29,486 psi | 48% | 2539 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 34,534 psi | 57% | 2723 fps | 98.6% |
| Bofors RP15 | <<locked>> | 86% | 37,478 psi | 62% | 2730 fps | 95.5% |
| Bofors RP30 | <<locked>> | 94% | 40,205 psi | 66% | 2825 fps | 95.8% |
| Bofors RP5 | <<locked>> | 84% | 37,797 psi | 62% | 2740 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 47,239 psi | 78% | 2822 fps | 98.8% |
| Hodgdon H1000 | <<locked>> | 92% | 39,900 psi | 66% | 2776 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 80% | 46,035 psi | 76% | 2867 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 80% | 48,588 psi | 80% | 2884 fps | 98.6% |
| Hodgdon H4831 | <<locked>> | 86% | 43,163 psi | 71% | 2799 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 88% | 45,397 psi | 75% | 2844 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 40,103 psi | 66% | 2707 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 35,143 psi | 58% | 2746 fps | 95.1% |
| Hodgdon Superformance | <<locked>> | 80% | 45,440 psi | 75% | 2890 fps | 98.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,601 psi | 45% | 1683 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 42,801 psi | 70% | 2753 fps | 98% |
| IMR 4451 Enduron | <<locked>> | 80% | 48,617 psi | 80% | 2851 fps | 99.3% |
| IMR 4831 | <<locked>> | 80% | 42,235 psi | 69% | 2762 fps | 99.8% |
| IMR 4955 Enduron | <<locked>> | 84% | 42,221 psi | 69% | 2740 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 88% | 41,553 psi | 68% | 2831 fps | 95.5% |
| Lovex S065 | <<locked>> | 80% | 46,137 psi | 76% | 2799 fps | 99.7% |
| Lovex S070 | <<locked>> | 80% | 44,599 psi | 73% | 2789 fps | 98.9% |
| Lovex S071 | <<locked>> | 82% | 30,327 psi | 50% | 2480 fps | 95.6% |
| Norma 204 | <<locked>> | 80% | 42,685 psi | 70% | 2789 fps | 96.9% |
| Norma 217 | <<locked>> | 96% | 32,996 psi | 54% | 2684 fps | 95% |
| Norma MRP | 60.5 gr | 80% | 34,330 psi | 56% | 2680 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 43,642 psi | 72% | 2808 fps | 99.9% |
| Ramshot Grand | <<locked>> | 88% | 41,205 psi | 68% | 2835 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 42,438 psi | 70% | 2802 fps | 99% |
| Ramshot Magnum | <<locked>> | 86% | 34,258 psi | 56% | 2644 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,239 psi | 46% | 1722 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 44,309 psi | 73% | 2841 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 42,554 psi | 70% | 2854 fps | 99.7% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 34,360 psi | 56% | 2723 fps | 96.1% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 44,266 psi | 73% | 2943 fps | 95.3% |
| Rottweil R 903 | <<locked>> | 80% | 51,430 psi | 84% | 2887 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 41,046 psi | 67% | 2723 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 80% | 36,419 psi | 60% | 2664 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 47,239 psi | 78% | 2822 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 46,137 psi | 76% | 2799 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 80% | 44,599 psi | 73% | 2789 fps | 98.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 51,663 psi | 85% | 2766 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 45,208 psi | 74% | 2743 fps | 98.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 36,085 psi | 59% | 2657 fps | 95.1% |
| Somchem S355 | <<locked>> | 80% | 51,111 psi | 84% | 2881 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 44,773 psi | 74% | 2772 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 40,524 psi | 67% | 2762 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 36,898 psi | 61% | 2648 fps | 96.4% |
| Vihtavuori N150 | <<locked>> | 80% | 49,095 psi | 81% | 2805 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 45,034 psi | 74% | 2802 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 82% | 34,229 psi | 56% | 2575 fps | 95% |
| Vihtavuori N550 | <<locked>> | 80% | 44,483 psi | 73% | 2805 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 80% | 35,607 psi | 58% | 2664 fps | 99.2% |
| Vihtavuori N560 | 65.1 gr | 86% | 42,714 psi | 70% | 2864 fps | 95.3% |
| Vihtavuori N565 | <<locked>> | 92% | 42,525 psi | 70% | 2848 fps | 95.6% |
| Vihtavuori N568 | <<locked>> | 98% | 45,484 psi | 75% | 2953 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 44,019 psi | 72% | 2762 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 46,224 psi | 76% | 2871 fps | 99.1% |
| Winchester StaBALL HD | 59.9 gr | 80% | 28,137 psi | 46% | 2589 fps | 99.3% |
| Winchester Supreme 780 | <<locked>> | 82% | 36,085 psi | 59% | 2628 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 72 powders for 7 mm Blaser Mag. loaded with the .284 | 150gr | Sierra GameKing. Winchester StaBALL HD delivers the highest muzzle velocity at 3,156 fps; across all powders the maximum-charge window runs from 1,883 fps to 3,156 fps. ADI AR 2217 gives the best case fill at 100 %, and 72 of the 72 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 150.0 gr projectile in 0.284" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-25 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. Winchester StaBALL HD, Vihtavuori N560, Norma MRP rank at the top here: for 7 mm Blaser Mag. with the .284 | 150gr | Sierra GameKing 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.