Load Specifications
Load data in caliber 7 mm Blaser Mag. with .284 | 140gr | Sierra SBT GameKing bullet and 79 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Vihtavuori N560 and Alliant Reloder-26.
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 3100 | <<locked>> | 98% | 55,042 psi | 90% | 3068 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 53,185 psi | 87% | 3061 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 52,605 psi | 86% | 3159 fps | 97.6% |
| Accurate MAGPRO | <<locked>> | 96% | 53,563 psi | 88% | 3156 fps | 96.5% |
| ADI AR 2208 | <<locked>> | 82% | 52,040 psi | 85% | 2976 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 54,157 psi | 89% | 3110 fps | 98.6% |
| ADI AR 2213 | <<locked>> | 96% | 51,880 psi | 85% | 3100 fps | 97.1% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 38,218 psi | 63% | 2858 fps | 96.7% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 54,230 psi | 89% | 3104 fps | 98.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 52,837 psi | 87% | 2999 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 54,041 psi | 89% | 3123 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 51,459 psi | 84% | 3081 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 53,534 psi | 88% | 3094 fps | 98.5% |
| Alliant Reloder-22 | <<locked>> | 98% | 54,868 psi | 90% | 3159 fps | 98.8% |
| Alliant Reloder-23 | <<locked>> | 98% | 51,924 psi | 85% | 3084 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 48,211 psi | 79% | 3074 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 94% | 51,938 psi | 85% | 3169 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 53,766 psi | 88% | 3140 fps | 98.6% |
| Bofors RP3 | <<locked>> | 82% | 53,751 psi | 88% | 3018 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 54,868 psi | 90% | 3159 fps | 98.8% |
| Bofors RP7 | <<locked>> | 86% | 53,142 psi | 87% | 3005 fps | 99% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 47,514 psi | 78% | 3009 fps | 96.9% |
| Hodgdon H380 | <<locked>> | 82% | 53,882 psi | 88% | 3035 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 51,692 psi | 85% | 3054 fps | 99.3% |
| Hodgdon H4350 | <<locked>> | 86% | 54,766 psi | 90% | 3071 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 94% | 51,953 psi | 85% | 3041 fps | 96.4% |
| Hodgdon H4831 SC | <<locked>> | 96% | 54,505 psi | 89% | 3084 fps | 97% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 54,331 psi | 89% | 3038 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 47,036 psi | 77% | 3117 fps | 98.3% |
| Hodgdon Superformance | <<locked>> | 86% | 51,619 psi | 85% | 3087 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,637 psi | 60% | 1926 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 54,766 psi | 90% | 3012 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 54,360 psi | 89% | 3045 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 86% | 54,679 psi | 90% | 3035 fps | 99.5% |
| IMR 4831 | <<locked>> | 90% | 53,679 psi | 88% | 3051 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 53,534 psi | 88% | 3031 fps | 96.9% |
| IMR 7828 SSC | <<locked>> | 98% | 52,866 psi | 87% | 3133 fps | 97.4% |
| Lovex S062 | <<locked>> | 82% | 55,085 psi | 90% | 3002 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 55,056 psi | 90% | 3035 fps | 99.9% |
| Lovex S070 | <<locked>> | 88% | 52,895 psi | 87% | 3022 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 48,979 psi | 80% | 2969 fps | 99.5% |
| Norma 204 | <<locked>> | 88% | 51,387 psi | 84% | 3035 fps | 97.9% |
| Norma MRP | <<locked>> | 96% | 54,607 psi | 90% | 3189 fps | 99.6% |
| Norma URP | <<locked>> | 88% | 51,866 psi | 85% | 3041 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 53,316 psi | 88% | 3153 fps | 97.9% |
| Ramshot Hunter | <<locked>> | 90% | 54,317 psi | 89% | 3100 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 51,677 psi | 85% | 3087 fps | 99% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,449 psi | 61% | 1975 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 53,766 psi | 88% | 3018 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 54,621 psi | 90% | 3130 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 53,185 psi | 87% | 3084 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 55,071 psi | 90% | 3169 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 47,369 psi | 78% | 3114 fps | 99.2% |
| Rottweil R 903 | <<locked>> | 84% | 54,114 psi | 89% | 3018 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 52,199 psi | 86% | 3018 fps | 97.2% |
| Rottweil R 905 | <<locked>> | 94% | 52,823 psi | 87% | 3081 fps | 98.5% |
| Rottweil R 907 | <<locked>> | 86% | 53,142 psi | 87% | 3005 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 88% | 55,056 psi | 90% | 3035 fps | 99.9% |
| Shooters World Precision | <<locked>> | 82% | 55,085 psi | 90% | 3002 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 52,895 psi | 87% | 3022 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 51,996 psi | 85% | 3022 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 54,578 psi | 90% | 2890 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 54,302 psi | 89% | 2979 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 52,373 psi | 86% | 3074 fps | 98.4% |
| Somchem S355 | <<locked>> | 84% | 53,838 psi | 88% | 3012 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 53,693 psi | 88% | 3005 fps | 96.7% |
| Somchem S365 | <<locked>> | 90% | 51,677 psi | 85% | 3048 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 53,664 psi | 88% | 3058 fps | 99.1% |
| Vihtavuori N150 | <<locked>> | 86% | 54,969 psi | 90% | 2982 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 53,809 psi | 88% | 3035 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 52,808 psi | 87% | 3028 fps | 98.8% |
| Vihtavuori N550 | <<locked>> | 88% | 53,142 psi | 87% | 3045 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 54,418 psi | 89% | 3110 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 54,723 psi | 90% | 3176 fps | 97.4% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 50,401 psi | 83% | 3084 fps | 96.7% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 53,316 psi | 88% | 2995 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 51,692 psi | 85% | 3054 fps | 99.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 51,605 psi | 85% | 3212 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 53,548 psi | 88% | 3048 fps | 98.4% |
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% | 31,966 psi | 52% | 2598 fps | 95.3% |
| Accurate 4350 | <<locked>> | 80% | 40,422 psi | 66% | 2822 fps | 99.2% |
| Accurate High Country | <<locked>> | 88% | 42,627 psi | 70% | 2956 fps | 95% |
| Accurate MAGPRO | <<locked>> | 94% | 49,864 psi | 82% | 3091 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 80% | 48,849 psi | 80% | 2923 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 41,597 psi | 68% | 2861 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 92% | 45,252 psi | 74% | 2966 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 98% | 35,868 psi | 59% | 2792 fps | 95.5% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 41,756 psi | 69% | 2861 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 49,792 psi | 82% | 2949 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,943 psi | 64% | 2828 fps | 99.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 44,483 psi | 73% | 2959 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 41,321 psi | 68% | 2854 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 88% | 39,175 psi | 64% | 2848 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,834 psi | 47% | 2575 fps | 97.7% |
| Alliant Reloder-25 | <<locked>> | 86% | 30,661 psi | 50% | 2641 fps | 95.1% |
| Alliant Reloder-26 | 60.5 gr | 80% | 30,937 psi | 51% | 2694 fps | 96.2% |
| Bofors RP15 | <<locked>> | 92% | 41,278 psi | 68% | 2897 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 50,343 psi | 83% | 2963 fps | 100% |
| Bofors RP5 | <<locked>> | 88% | 39,175 psi | 64% | 2848 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 43,874 psi | 72% | 2828 fps | 97.4% |
| Hodgdon H1000 | <<locked>> | 98% | 44,469 psi | 73% | 2943 fps | 96% |
| Hodgdon H380 | <<locked>> | 80% | 50,531 psi | 83% | 2979 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 42,351 psi | 70% | 2871 fps | 97.6% |
| Hodgdon H4350 | <<locked>> | 80% | 45,049 psi | 74% | 2890 fps | 97% |
| Hodgdon H4831 | <<locked>> | 92% | 48,617 psi | 80% | 2979 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 92% | 47,456 psi | 78% | 2956 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,506 psi | 60% | 2713 fps | 99.6% |
| Hodgdon Retumbo | <<locked>> | 94% | 38,740 psi | 64% | 2913 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 41,249 psi | 68% | 2884 fps | 97.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,456 psi | 45% | 1726 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,372 psi | 84% | 2956 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 39,595 psi | 65% | 2756 fps | 96.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,324 psi | 74% | 2861 fps | 98.1% |
| IMR 4831 | <<locked>> | 80% | 38,667 psi | 63% | 2769 fps | 98.9% |
| IMR 4955 Enduron | <<locked>> | 90% | 47,210 psi | 78% | 2917 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 94% | 46,267 psi | 76% | 3005 fps | 95.8% |
| Lovex S062 | <<locked>> | 80% | 51,909 psi | 85% | 2953 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,975 psi | 71% | 2812 fps | 98.7% |
| Lovex S070 | <<locked>> | 80% | 41,205 psi | 68% | 2792 fps | 97.5% |
| Lovex S071 | <<locked>> | 88% | 33,228 psi | 55% | 2631 fps | 95.8% |
| Norma 204 | <<locked>> | 82% | 41,989 psi | 69% | 2848 fps | 95.6% |
| Norma MRP | 61.7 gr | 84% | 35,795 psi | 59% | 2795 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 40,001 psi | 66% | 2812 fps | 99% |
| Ramshot Grand | <<locked>> | 92% | 43,134 psi | 71% | 2946 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 38,754 psi | 64% | 2799 fps | 97.5% |
| Ramshot Magnum | <<locked>> | 92% | 38,377 psi | 63% | 2815 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,876 psi | 46% | 1765 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 50,285 psi | 83% | 2959 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 47,239 psi | 78% | 3012 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,263 psi | 66% | 2841 fps | 99% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 38,885 psi | 64% | 2851 fps | 98.6% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 35,723 psi | 59% | 2825 fps | 95.3% |
| Rottweil R 903 | <<locked>> | 80% | 47,456 psi | 78% | 2907 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 45,861 psi | 75% | 2897 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 86% | 40,437 psi | 66% | 2835 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 43,874 psi | 72% | 2828 fps | 97.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,975 psi | 71% | 2812 fps | 98.7% |
| Shooters World Precision | <<locked>> | 80% | 51,909 psi | 85% | 2953 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 41,205 psi | 68% | 2792 fps | 97.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 48,530 psi | 80% | 2963 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,153 psi | 79% | 2795 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,003 psi | 69% | 2753 fps | 97.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 40,059 psi | 66% | 2831 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 47,601 psi | 78% | 2904 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 46,978 psi | 77% | 2884 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 36,593 psi | 60% | 2769 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 36,027 psi | 59% | 2700 fps | 95% |
| Vihtavuori N150 | <<locked>> | 80% | 45,484 psi | 75% | 2828 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,394 psi | 68% | 2812 fps | 99.2% |
| Vihtavuori N165 | <<locked>> | 88% | 37,942 psi | 62% | 2736 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 40,799 psi | 67% | 2812 fps | 99% |
| Vihtavuori N555 | <<locked>> | 80% | 32,053 psi | 53% | 2654 fps | 97.7% |
| Vihtavuori N560 | 67.5 gr | 92% | 47,500 psi | 78% | 3041 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 98% | 46,934 psi | 77% | 3015 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,509 psi | 67% | 2776 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 42,351 psi | 70% | 2871 fps | 97.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,454 psi | 42% | 2549 fps | 96.8% |
| Winchester Supreme 780 | <<locked>> | 88% | 40,422 psi | 66% | 2799 fps | 95.4% |
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 79 powders for 7 mm Blaser Mag. loaded with the .284 | 140gr | Sierra SBT GameKing. Winchester StaBALL HD delivers the highest muzzle velocity at 3,212 fps; across all powders the maximum-charge window runs from 1,926 fps to 3,212 fps. ADI AR 2225 gives the best case fill at 100 %, and 79 of the 79 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 140.0 gr projectile in 0.284" calls for a 1:12.0 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. Norma MRP, Vihtavuori N560, Alliant Reloder-26 rank at the top here: for 7 mm Blaser Mag. with the .284 | 140gr | Sierra SBT 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.