Load Specifications
Load data in caliber 7 mm Blaser Mag. with .284 | 145gr | Prvi Partizan SP bullet and 75 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate MAGPRO, Winchester StaBALL HD 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% | 54,549 psi | 90% | 3018 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 52,431 psi | 86% | 3002 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 52,156 psi | 86% | 3107 fps | 97.9% |
| Accurate MAGPRO | <<locked>> | 94% | 52,953 psi | 87% | 3104 fps | 96.9% |
| ADI AR 2208 | <<locked>> | 82% | 54,172 psi | 89% | 2969 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 53,374 psi | 88% | 3054 fps | 98.8% |
| ADI AR 2213 | <<locked>> | 96% | 54,505 psi | 89% | 3110 fps | 98.1% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 45,672 psi | 75% | 2930 fps | 96.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 40,596 psi | 67% | 2887 fps | 98.2% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 53,476 psi | 88% | 3051 fps | 98.8% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 53,476 psi | 88% | 3051 fps | 98.8% |
| Alliant Reloder-16 | <<locked>> | 88% | 53,287 psi | 87% | 3061 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 54,317 psi | 89% | 3077 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 52,808 psi | 87% | 3041 fps | 98.8% |
| Alliant Reloder-22 | <<locked>> | 96% | 54,215 psi | 89% | 3107 fps | 99.1% |
| Alliant Reloder-23 | <<locked>> | 96% | 51,750 psi | 85% | 3031 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 51,082 psi | 84% | 3084 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 51,648 psi | 85% | 3117 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 53,403 psi | 88% | 3091 fps | 98.9% |
| Bofors RP30ᴾ | <<locked>> | 100% | 47,065 psi | 77% | 3009 fps | 97.3% |
| Bofors RP5 | <<locked>> | 96% | 54,215 psi | 89% | 3107 fps | 99.1% |
| Bofors RP7 | <<locked>> | 84% | 52,141 psi | 86% | 2949 fps | 99.2% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 50,401 psi | 83% | 3028 fps | 98.2% |
| Hodgdon H414 | <<locked>> | 86% | 54,230 psi | 89% | 3054 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 84% | 53,563 psi | 88% | 3012 fps | 99% |
| Hodgdon H4831 | <<locked>> | 94% | 54,592 psi | 90% | 3048 fps | 97.5% |
| Hodgdon H4831 SC | <<locked>> | 94% | 53,592 psi | 88% | 3031 fps | 97.3% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 53,751 psi | 88% | 2982 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 50,067 psi | 82% | 3143 fps | 99.3% |
| Hodgdon Superformance | <<locked>> | 86% | 54,476 psi | 89% | 3091 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,796 psi | 60% | 1906 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 53,374 psi | 88% | 2989 fps | 99.4% |
| IMR 4451 Enduron | <<locked>> | 84% | 53,374 psi | 88% | 2972 fps | 99.6% |
| IMR 4831 | <<locked>> | 88% | 52,852 psi | 87% | 2995 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 52,663 psi | 86% | 2979 fps | 97.3% |
| IMR 7828 SSC | <<locked>> | 96% | 52,344 psi | 86% | 3084 fps | 97.8% |
| Lovex S065 | <<locked>> | 86% | 54,056 psi | 89% | 2976 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 51,996 psi | 85% | 2963 fps | 99.6% |
| Lovex S071ᴾ | <<locked>> | 100% | 52,054 psi | 85% | 2979 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 54,056 psi | 89% | 3041 fps | 98.8% |
| Norma MRP | <<locked>> | 94% | 54,027 psi | 89% | 3133 fps | 99.7% |
| Norma URP | <<locked>> | 88% | 54,737 psi | 90% | 3045 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 52,794 psi | 87% | 3104 fps | 98.2% |
| Ramshot Hunter | <<locked>> | 88% | 53,476 psi | 88% | 3045 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 55,071 psi | 90% | 3100 fps | 99.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,623 psi | 62% | 1952 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 53,708 psi | 88% | 3064 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 52,504 psi | 86% | 3025 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 54,447 psi | 89% | 3114 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 50,343 psi | 83% | 3136 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 82% | 53,055 psi | 87% | 2956 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 54,737 psi | 90% | 3022 fps | 98.1% |
| Rottweil R 905 | <<locked>> | 92% | 52,228 psi | 86% | 3028 fps | 98.8% |
| Rottweil R 907 | <<locked>> | 84% | 52,141 psi | 86% | 2949 fps | 99.2% |
| Shooters World Long Rifle | <<locked>> | 86% | 54,056 psi | 89% | 2976 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 51,996 psi | 85% | 2963 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 54,549 psi | 90% | 3018 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 53,243 psi | 87% | 2828 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 53,185 psi | 87% | 2920 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 51,793 psi | 85% | 3022 fps | 98.7% |
| Somchem S355 | <<locked>> | 82% | 52,982 psi | 87% | 2953 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 52,779 psi | 87% | 2953 fps | 97.1% |
| Somchem S365 | <<locked>> | 90% | 54,549 psi | 90% | 3041 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 52,736 psi | 87% | 3002 fps | 99.3% |
| Vihtavuori N150 | <<locked>> | 84% | 53,983 psi | 89% | 2920 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 52,953 psi | 87% | 2979 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 52,286 psi | 86% | 2979 fps | 99.1% |
| Vihtavuori N550 | <<locked>> | 86% | 52,315 psi | 86% | 2986 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 53,983 psi | 89% | 3058 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 54,041 psi | 89% | 3127 fps | 97.7% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 53,534 psi | 88% | 3097 fps | 97.9% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 52,344 psi | 86% | 2936 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 54,491 psi | 89% | 3061 fps | 99.7% |
| Winchester StaBALL HD | <<locked>> | 98% | 51,938 psi | 85% | 3163 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 52,649 psi | 86% | 2995 fps | 98.7% |
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 3100 | <<locked>> | 80% | 31,676 psi | 52% | 2552 fps | 95.7% |
| Accurate 4350 | <<locked>> | 80% | 42,714 psi | 70% | 2828 fps | 99.7% |
| Accurate High Country | <<locked>> | 86% | 42,235 psi | 69% | 2910 fps | 95.4% |
| Accurate MAGPRO | 68.8 gr | 90% | 46,050 psi | 76% | 2976 fps | 95.1% |
| ADI AR 2208 | <<locked>> | 80% | 50,923 psi | 84% | 2917 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 38,218 psi | 63% | 2746 fps | 95.1% |
| ADI AR 2213 | <<locked>> | 90% | 44,628 psi | 73% | 2920 fps | 95.8% |
| ADI AR 2217 | <<locked>> | 98% | 42,772 psi | 70% | 2867 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 94% | 33,373 psi | 55% | 2694 fps | 95.1% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 38,493 psi | 63% | 2746 fps | 95.2% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 38,493 psi | 63% | 2746 fps | 95.2% |
| Alliant Reloder-16 | <<locked>> | 80% | 41,002 psi | 67% | 2835 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 47,137 psi | 77% | 2959 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 38,130 psi | 63% | 2743 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 86% | 38,783 psi | 64% | 2799 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,371 psi | 50% | 2585 fps | 98.7% |
| Alliant Reloder-25 | <<locked>> | 84% | 30,269 psi | 50% | 2595 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 80% | 32,909 psi | 54% | 2713 fps | 97.7% |
| Bofors RP15 | <<locked>> | 88% | 38,464 psi | 63% | 2789 fps | 95.3% |
| Bofors RP30 | <<locked>> | 96% | 41,017 psi | 67% | 2881 fps | 95.5% |
| Bofors RP5 | <<locked>> | 86% | 38,783 psi | 64% | 2799 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 45,832 psi | 75% | 2831 fps | 98.3% |
| Hodgdon H1000 | <<locked>> | 94% | 40,973 psi | 67% | 2831 fps | 95.5% |
| Hodgdon H414 | <<locked>> | 80% | 44,440 psi | 73% | 2877 fps | 98.5% |
| Hodgdon H4350 | <<locked>> | 80% | 47,094 psi | 77% | 2894 fps | 97.9% |
| Hodgdon H4831 | <<locked>> | 88% | 44,498 psi | 73% | 2861 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 90% | 46,833 psi | 77% | 2910 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 38,595 psi | 63% | 2717 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 92% | 38,421 psi | 63% | 2871 fps | 96% |
| Hodgdon Superformance | <<locked>> | 80% | 43,540 psi | 71% | 2894 fps | 98.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,615 psi | 45% | 1706 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 41,452 psi | 68% | 2759 fps | 97.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 47,239 psi | 78% | 2861 fps | 98.8% |
| IMR 4831 | <<locked>> | 80% | 40,727 psi | 67% | 2772 fps | 99.5% |
| IMR 4955 Enduron | <<locked>> | 86% | 43,555 psi | 72% | 2805 fps | 95% |
| IMR 7828 SSC | <<locked>> | 90% | 42,815 psi | 70% | 2894 fps | 95.3% |
| Lovex S065 | <<locked>> | 80% | 44,730 psi | 73% | 2808 fps | 99.3% |
| Lovex S070 | <<locked>> | 80% | 43,163 psi | 71% | 2795 fps | 98.4% |
| Lovex S071 | <<locked>> | 84% | 31,096 psi | 51% | 2536 fps | 95.4% |
| Norma 204 | <<locked>> | 80% | 41,234 psi | 68% | 2795 fps | 96% |
| Norma MRP | 61.5 gr | 82% | 35,360 psi | 58% | 2746 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 42,105 psi | 69% | 2818 fps | 99.6% |
| Ramshot Grand | <<locked>> | 90% | 42,467 psi | 70% | 2897 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 40,973 psi | 67% | 2808 fps | 98.5% |
| Ramshot Magnum | <<locked>> | 88% | 35,360 psi | 58% | 2707 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,050 psi | 46% | 1745 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 49,980 psi | 82% | 3009 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 42,453 psi | 70% | 2844 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 40,814 psi | 67% | 2858 fps | 99.3% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 35,244 psi | 58% | 2782 fps | 95.9% |
| Rottweil R 903 | <<locked>> | 80% | 49,763 psi | 82% | 2904 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 42,322 psi | 69% | 2789 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 82% | 37,405 psi | 61% | 2726 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 80% | 45,832 psi | 75% | 2831 fps | 98.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 44,730 psi | 73% | 2808 fps | 99.3% |
| Shooters World SW4350 | <<locked>> | 80% | 43,163 psi | 71% | 2795 fps | 98.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 51,024 psi | 84% | 2959 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 50,212 psi | 82% | 2785 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,801 psi | 72% | 2753 fps | 98.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 37,115 psi | 61% | 2720 fps | 95% |
| Somchem S355 | <<locked>> | 80% | 49,545 psi | 81% | 2897 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 46,137 psi | 76% | 2835 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 38,856 psi | 64% | 2772 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 35,563 psi | 58% | 2651 fps | 95.4% |
| Vihtavuori N150 | <<locked>> | 80% | 47,572 psi | 78% | 2822 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 43,468 psi | 71% | 2812 fps | 99.7% |
| Vihtavuori N165 | <<locked>> | 86% | 37,521 psi | 62% | 2690 fps | 95.7% |
| Vihtavuori N550 | <<locked>> | 80% | 42,844 psi | 70% | 2812 fps | 99.6% |
| Vihtavuori N555 | <<locked>> | 80% | 34,113 psi | 56% | 2667 fps | 98.7% |
| Vihtavuori N560 | <<locked>> | 88% | 43,874 psi | 72% | 2927 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 94% | 43,613 psi | 72% | 2907 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 42,569 psi | 70% | 2776 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 44,657 psi | 73% | 2881 fps | 98.5% |
| Winchester StaBALL HD | 59.4 gr | 80% | 27,006 psi | 44% | 2582 fps | 98.5% |
| Winchester Supreme 780 | <<locked>> | 86% | 39,871 psi | 65% | 2749 fps | 95.8% |
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 75 powders for 7 mm Blaser Mag. loaded with the .284 | 145gr | Prvi Partizan SP. Winchester StaBALL HD delivers the highest muzzle velocity at 3,163 fps; across all powders the maximum-charge window runs from 1,906 fps to 3,163 fps. ADI AR 2217 gives the best case fill at 100 %, and 75 of the 75 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 1:13.0 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. Accurate MAGPRO, Winchester StaBALL HD, Norma MRP rank at the top here: for 7 mm Blaser Mag. with the .284 | 145gr | Prvi Partizan SP 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.