Load Specifications
Load data in caliber 7 mm Blaser Mag. with .284 | 145gr | Speer Boat-Tail bullet and 73 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Winchester StaBALL HD and IMR 7828 SSC.
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% | 55,056 psi | 90% | 3028 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 52,997 psi | 87% | 3015 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 53,388 psi | 88% | 3117 fps | 97.1% |
| ADI AR 2208 | <<locked>> | 82% | 54,462 psi | 89% | 2976 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 53,592 psi | 88% | 3064 fps | 98.9% |
| ADI AR 2213 | <<locked>> | 94% | 51,474 psi | 85% | 3058 fps | 97.6% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 46,035 psi | 76% | 2943 fps | 96.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 40,886 psi | 67% | 2897 fps | 98.3% |
| Alliant Reloder-16 | <<locked>> | 88% | 53,824 psi | 88% | 3074 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 54,853 psi | 90% | 3087 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 53,258 psi | 87% | 3051 fps | 98.9% |
| Alliant Reloder-22 | <<locked>> | 96% | 54,911 psi | 90% | 3120 fps | 99.2% |
| Alliant Reloder-23 | <<locked>> | 96% | 52,243 psi | 86% | 3041 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 51,488 psi | 85% | 3094 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 52,156 psi | 86% | 3127 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 53,824 psi | 88% | 3100 fps | 99% |
| Bofors RP30ᴾ | <<locked>> | 100% | 47,456 psi | 78% | 3018 fps | 97.4% |
| Bofors RP5 | <<locked>> | 96% | 54,911 psi | 90% | 3120 fps | 99.2% |
| Bofors RP7 | <<locked>> | 84% | 52,373 psi | 86% | 2956 fps | 99.3% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 50,734 psi | 83% | 3038 fps | 98.3% |
| Hodgdon H414 | <<locked>> | 86% | 54,752 psi | 90% | 3068 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 84% | 54,041 psi | 89% | 3025 fps | 99.1% |
| Hodgdon H4831 | <<locked>> | 94% | 55,013 psi | 90% | 3058 fps | 97.6% |
| Hodgdon H4831 SC | <<locked>> | 94% | 54,027 psi | 89% | 3041 fps | 97.4% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 53,983 psi | 89% | 2989 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 50,473 psi | 83% | 3156 fps | 99.4% |
| Hodgdon Superformance | <<locked>> | 86% | 54,984 psi | 90% | 3104 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,869 psi | 61% | 1913 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 53,809 psi | 88% | 2999 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 84% | 53,867 psi | 88% | 2986 fps | 99.6% |
| IMR 4831 | <<locked>> | 88% | 53,359 psi | 88% | 3005 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 52,837 psi | 87% | 2986 fps | 97.4% |
| IMR 7828 SSC | <<locked>> | 96% | 52,765 psi | 87% | 3097 fps | 98% |
| Lovex S065 | <<locked>> | 86% | 54,331 psi | 89% | 2982 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 52,489 psi | 86% | 2976 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 52,518 psi | 86% | 2989 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 54,534 psi | 90% | 3051 fps | 98.9% |
| Norma 217ᴾ | <<locked>> | 100% | 36,390 psi | 60% | 2815 fps | 96.1% |
| Norma MRP | <<locked>> | 94% | 54,534 psi | 90% | 3143 fps | 99.8% |
| Norma URP | <<locked>> | 88% | 55,013 psi | 90% | 3051 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 53,200 psi | 87% | 3114 fps | 98.4% |
| Ramshot Hunter | <<locked>> | 88% | 53,896 psi | 88% | 3054 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 98% | 51,488 psi | 85% | 3045 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,695 psi | 62% | 1959 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 54,302 psi | 89% | 3077 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 52,750 psi | 87% | 3031 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 54,926 psi | 90% | 3123 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 50,923 psi | 84% | 3150 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 82% | 53,345 psi | 88% | 2963 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 51,634 psi | 85% | 2972 fps | 97.6% |
| Rottweil R 905 | <<locked>> | 92% | 52,649 psi | 86% | 3041 fps | 98.9% |
| Rottweil R 907 | <<locked>> | 84% | 52,373 psi | 86% | 2956 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 86% | 54,331 psi | 89% | 2982 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 52,489 psi | 86% | 2976 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 54,824 psi | 90% | 3025 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 53,548 psi | 88% | 2835 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 53,679 psi | 88% | 2933 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 52,214 psi | 86% | 3035 fps | 98.8% |
| Somchem S355 | <<locked>> | 82% | 53,287 psi | 87% | 2959 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 53,142 psi | 87% | 2966 fps | 97.2% |
| Somchem S365 | <<locked>> | 88% | 51,619 psi | 85% | 3002 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 53,185 psi | 87% | 3012 fps | 99.4% |
| Vihtavuori N150 | <<locked>> | 84% | 54,491 psi | 89% | 2933 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 53,447 psi | 88% | 2989 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 52,707 psi | 87% | 2989 fps | 99.1% |
| Vihtavuori N550 | <<locked>> | 86% | 52,562 psi | 86% | 2995 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 54,505 psi | 89% | 3068 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 54,520 psi | 90% | 3136 fps | 97.9% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 54,172 psi | 89% | 3110 fps | 98% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 52,794 psi | 87% | 2946 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 54,984 psi | 90% | 3071 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 98% | 52,794 psi | 87% | 3176 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 53,113 psi | 87% | 3005 fps | 98.8% |
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% | 31,923 psi | 52% | 2562 fps | 95.9% |
| Accurate 4350 | <<locked>> | 80% | 43,033 psi | 71% | 2838 fps | 99.8% |
| Accurate MAGPRO | <<locked>> | 90% | 46,470 psi | 76% | 2986 fps | 95.3% |
| ADI AR 2208 | <<locked>> | 80% | 51,198 psi | 84% | 2923 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 38,464 psi | 63% | 2756 fps | 95.3% |
| ADI AR 2213 | <<locked>> | 88% | 42,018 psi | 69% | 2864 fps | 95% |
| ADI AR 2217 | <<locked>> | 98% | 43,120 psi | 71% | 2881 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 94% | 33,707 psi | 55% | 2707 fps | 95.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 41,307 psi | 68% | 2844 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 47,659 psi | 78% | 2972 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 38,537 psi | 63% | 2756 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 86% | 39,030 psi | 64% | 2808 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,748 psi | 50% | 2595 fps | 98.8% |
| Alliant Reloder-25 | <<locked>> | 84% | 30,603 psi | 50% | 2612 fps | 95.9% |
| Alliant Reloder-26 | 62.3 gr | 80% | 33,315 psi | 55% | 2726 fps | 97.9% |
| Bofors RP15 | <<locked>> | 88% | 38,696 psi | 64% | 2799 fps | 95.5% |
| Bofors RP30 | <<locked>> | 96% | 41,394 psi | 68% | 2894 fps | 95.7% |
| Bofors RP5 | <<locked>> | 86% | 39,030 psi | 64% | 2808 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 46,267 psi | 76% | 2844 fps | 98.4% |
| Hodgdon H1000 | <<locked>> | 94% | 41,307 psi | 68% | 2844 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 80% | 44,730 psi | 73% | 2884 fps | 98.6% |
| Hodgdon H4350 | <<locked>> | 80% | 47,558 psi | 78% | 2907 fps | 98.1% |
| Hodgdon H4831 | <<locked>> | 88% | 44,933 psi | 74% | 2874 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 88% | 44,077 psi | 72% | 2854 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 38,899 psi | 64% | 2723 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 90% | 36,245 psi | 60% | 2812 fps | 95% |
| Hodgdon Superformance | <<locked>> | 80% | 44,005 psi | 72% | 2904 fps | 98.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,557 psi | 45% | 1709 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 41,698 psi | 68% | 2769 fps | 97.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 47,485 psi | 78% | 2871 fps | 98.9% |
| IMR 4831 | <<locked>> | 80% | 41,017 psi | 67% | 2779 fps | 99.6% |
| IMR 4955 Enduron | <<locked>> | 86% | 43,772 psi | 72% | 2815 fps | 95.1% |
| IMR 7828 SSC | 65.4 gr | 90% | 43,033 psi | 71% | 2900 fps | 95.5% |
| Lovex S065 | <<locked>> | 80% | 45,208 psi | 74% | 2822 fps | 99.4% |
| Lovex S070 | <<locked>> | 80% | 43,439 psi | 71% | 2805 fps | 98.5% |
| Lovex S071 | <<locked>> | 84% | 31,328 psi | 51% | 2546 fps | 95.6% |
| Norma 204 | <<locked>> | 80% | 41,466 psi | 68% | 2802 fps | 96.1% |
| Norma 217 | <<locked>> | 98% | 34,142 psi | 56% | 2753 fps | 95.1% |
| Norma MRP | <<locked>> | 82% | 35,766 psi | 59% | 2759 fps | 96.1% |
| Norma URP | <<locked>> | 80% | 42,424 psi | 70% | 2825 fps | 99.7% |
| Ramshot Grand | <<locked>> | 90% | 42,859 psi | 70% | 2910 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 41,220 psi | 68% | 2815 fps | 98.5% |
| Ramshot Magnum | <<locked>> | 88% | 35,520 psi | 58% | 2713 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,166 psi | 46% | 1752 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 50,575 psi | 83% | 3022 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 42,946 psi | 71% | 2854 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 41,263 psi | 68% | 2871 fps | 99.4% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 35,534 psi | 58% | 2792 fps | 96.1% |
| Rottweil R 903 | <<locked>> | 80% | 50,082 psi | 82% | 2910 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 42,728 psi | 70% | 2799 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 82% | 37,695 psi | 62% | 2736 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 46,267 psi | 76% | 2844 fps | 98.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 45,208 psi | 74% | 2822 fps | 99.4% |
| Shooters World SW4350 | <<locked>> | 80% | 43,439 psi | 71% | 2805 fps | 98.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 51,285 psi | 84% | 2969 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 50,502 psi | 83% | 2792 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 44,077 psi | 72% | 2762 fps | 98.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 37,347 psi | 61% | 2730 fps | 95.1% |
| Somchem S355 | <<locked>> | 80% | 50,082 psi | 82% | 2907 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 46,499 psi | 76% | 2844 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 39,175 psi | 64% | 2779 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 35,940 psi | 59% | 2664 fps | 95.6% |
| Vihtavuori N150 | <<locked>> | 80% | 47,834 psi | 79% | 2828 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 43,772 psi | 72% | 2818 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 84% | 35,389 psi | 58% | 2641 fps | 95% |
| Vihtavuori N550 | <<locked>> | 80% | 43,294 psi | 71% | 2825 fps | 99.6% |
| Vihtavuori N555 | <<locked>> | 80% | 34,374 psi | 56% | 2674 fps | 98.8% |
| Vihtavuori N560 | <<locked>> | 88% | 44,309 psi | 73% | 2940 fps | 95.4% |
| Vihtavuori N565 | <<locked>> | 94% | 44,063 psi | 72% | 2920 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 42,815 psi | 70% | 2782 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 44,904 psi | 74% | 2887 fps | 98.6% |
| Winchester StaBALL HD | 59.8 gr | 80% | 27,209 psi | 45% | 2592 fps | 98.6% |
| Winchester Supreme 780 | <<locked>> | 84% | 37,521 psi | 62% | 2697 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 79 powders for 7 mm Blaser Mag. loaded with the .284 | 145gr | Speer Boat-Tail. Winchester StaBALL HD delivers the highest muzzle velocity at 3,176 fps; across all powders the maximum-charge window runs from 1,913 fps to 3,176 fps. ADI AR 2217 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 145.0 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. Alliant Reloder-26, Winchester StaBALL HD, IMR 7828 SSC rank at the top here: for 7 mm Blaser Mag. with the .284 | 145gr | Speer Boat-Tail they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, IMR 8133 Enduron, Vihtavuori N170, Vihtavuori N570 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.