Load Specifications
Load data in caliber 7 mm Blaser Mag. with .285 | 139gr | Prvi Partizan SP bullet and 77 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Accurate MAGPRO and Ramshot Grand.
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% | 52,663 psi | 86% | 3045 fps | 99.8% |
| Accurate 4350 | <<locked>> | 88% | 54,172 psi | 89% | 3087 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 53,853 psi | 88% | 3192 fps | 97.9% |
| Accurate MAGPRO | <<locked>> | 96% | 54,694 psi | 90% | 3189 fps | 96.8% |
| ADI AR 2208 | <<locked>> | 82% | 52,837 psi | 87% | 3005 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 54,911 psi | 90% | 3133 fps | 98.7% |
| ADI AR 2213 | <<locked>> | 96% | 52,765 psi | 87% | 3130 fps | 97.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 39,030 psi | 64% | 2894 fps | 97% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 51,808 psi | 85% | 3074 fps | 98.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 53,664 psi | 88% | 3025 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 55,013 psi | 90% | 3150 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 52,446 psi | 86% | 3110 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 54,491 psi | 89% | 3123 fps | 98.7% |
| Alliant Reloder-22 | <<locked>> | 96% | 52,286 psi | 86% | 3127 fps | 98.5% |
| Alliant Reloder-23 | <<locked>> | 98% | 53,243 psi | 87% | 3114 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 48,994 psi | 80% | 3100 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 94% | 53,258 psi | 87% | 3202 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 54,737 psi | 90% | 3169 fps | 98.8% |
| Bofors RP3 | <<locked>> | 82% | 54,520 psi | 90% | 3041 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 44,947 psi | 74% | 3018 fps | 96.2% |
| Bofors RP5 | <<locked>> | 96% | 52,286 psi | 86% | 3127 fps | 98.5% |
| Bofors RP7 | <<locked>> | 86% | 53,766 psi | 88% | 3031 fps | 99.1% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 48,457 psi | 80% | 3038 fps | 97.2% |
| Hodgdon H380 | <<locked>> | 82% | 54,853 psi | 90% | 3064 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 52,562 psi | 86% | 3084 fps | 99.4% |
| Hodgdon H4350 | <<locked>> | 84% | 52,040 psi | 85% | 3038 fps | 98.5% |
| Hodgdon H4831 | <<locked>> | 94% | 52,866 psi | 87% | 3071 fps | 96.7% |
| Hodgdon H4831 SC | <<locked>> | 94% | 51,663 psi | 85% | 3048 fps | 96.4% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 51,735 psi | 85% | 3012 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 48,037 psi | 79% | 3153 fps | 98.6% |
| Hodgdon Superformance | <<locked>> | 86% | 52,591 psi | 86% | 3117 fps | 99.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,695 psi | 60% | 1942 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 51,866 psi | 85% | 3015 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 84% | 52,025 psi | 85% | 3005 fps | 99.2% |
| IMR 4831 | <<locked>> | 90% | 54,549 psi | 90% | 3077 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 54,201 psi | 89% | 3058 fps | 97.1% |
| IMR 7828 SSC | <<locked>> | 98% | 54,027 psi | 89% | 3166 fps | 97.7% |
| Lovex S065 | <<locked>> | 86% | 52,388 psi | 86% | 3002 fps | 99.8% |
| Lovex S070 | <<locked>> | 88% | 53,766 psi | 88% | 3048 fps | 99.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 49,995 psi | 82% | 2999 fps | 99.6% |
| Norma 204 | <<locked>> | 88% | 52,417 psi | 86% | 3064 fps | 98.2% |
| Norma MRP | <<locked>> | 94% | 52,011 psi | 85% | 3156 fps | 99.4% |
| Norma URP | <<locked>> | 88% | 52,808 psi | 87% | 3071 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 54,462 psi | 89% | 3186 fps | 98.1% |
| Ramshot Hunter | <<locked>> | 88% | 51,764 psi | 85% | 3071 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 52,649 psi | 86% | 3117 fps | 99.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,492 psi | 62% | 1991 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 54,665 psi | 90% | 3048 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 51,822 psi | 85% | 3100 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 54,070 psi | 89% | 3110 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 52,301 psi | 86% | 3136 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 48,472 psi | 80% | 3150 fps | 99.4% |
| Rottweil R 903 | <<locked>> | 84% | 54,868 psi | 90% | 3045 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 52,939 psi | 87% | 3045 fps | 97.4% |
| Rottweil R 905 | <<locked>> | 94% | 53,838 psi | 88% | 3110 fps | 98.7% |
| Rottweil R 907 | <<locked>> | 86% | 53,766 psi | 88% | 3031 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 86% | 52,388 psi | 86% | 3002 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 88% | 53,766 psi | 88% | 3048 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 52,707 psi | 87% | 3045 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 51,938 psi | 85% | 2867 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 55,100 psi | 90% | 3005 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 53,388 psi | 88% | 3104 fps | 98.6% |
| Somchem S355 | <<locked>> | 84% | 54,592 psi | 90% | 3035 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 54,694 psi | 90% | 3038 fps | 97% |
| Somchem S365 | <<locked>> | 90% | 52,620 psi | 86% | 3074 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 54,389 psi | 89% | 3081 fps | 99.2% |
| Vihtavuori N150 | <<locked>> | 84% | 52,475 psi | 86% | 2956 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 54,708 psi | 90% | 3064 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 53,925 psi | 89% | 3058 fps | 99% |
| Vihtavuori N550 | <<locked>> | 88% | 53,998 psi | 89% | 3071 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 52,040 psi | 85% | 3087 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 52,127 psi | 86% | 3143 fps | 96.9% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 51,459 psi | 84% | 3114 fps | 97% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 54,273 psi | 89% | 3022 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 52,562 psi | 86% | 3084 fps | 99.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 53,359 psi | 88% | 3248 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 54,447 psi | 89% | 3077 fps | 98.6% |
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% | 32,590 psi | 54% | 2625 fps | 95.5% |
| Accurate 4350 | <<locked>> | 80% | 41,249 psi | 68% | 2851 fps | 99.3% |
| Accurate High Country | <<locked>> | 88% | 43,584 psi | 72% | 2989 fps | 95.3% |
| Accurate MAGPRO | 71.8 gr | 94% | 50,981 psi | 84% | 3123 fps | 95.9% |
| ADI AR 2208 | <<locked>> | 80% | 49,603 psi | 81% | 2949 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 39,523 psi | 65% | 2825 fps | 95% |
| ADI AR 2213 | <<locked>> | 92% | 46,122 psi | 76% | 2999 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 98% | 36,666 psi | 60% | 2828 fps | 96% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 39,711 psi | 65% | 2828 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,401 psi | 83% | 2972 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,668 psi | 65% | 2858 fps | 99.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 45,455 psi | 75% | 2989 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 39,305 psi | 65% | 2818 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 88% | 39,914 psi | 66% | 2877 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,283 psi | 48% | 2598 fps | 97.9% |
| Alliant Reloder-25 | <<locked>> | 86% | 31,140 psi | 51% | 2667 fps | 95.4% |
| Alliant Reloder-26 | 61.8 gr | 80% | 31,618 psi | 52% | 2723 fps | 96.6% |
| Bofors RP15 | <<locked>> | 90% | 39,378 psi | 65% | 2861 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 51,155 psi | 84% | 2989 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 42,090 psi | 69% | 2956 fps | 95.3% |
| Bofors RP5 | <<locked>> | 88% | 39,914 psi | 66% | 2877 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 44,585 psi | 73% | 2858 fps | 97.6% |
| Hodgdon H1000 | <<locked>> | 96% | 42,293 psi | 69% | 2907 fps | 95.3% |
| Hodgdon H380 | <<locked>> | 80% | 51,285 psi | 84% | 3005 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 43,033 psi | 71% | 2900 fps | 97.8% |
| Hodgdon H4350 | <<locked>> | 80% | 45,745 psi | 75% | 2917 fps | 97.2% |
| Hodgdon H4831 | <<locked>> | 90% | 46,166 psi | 76% | 2946 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 92% | 48,356 psi | 79% | 2989 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,260 psi | 61% | 2740 fps | 99.7% |
| Hodgdon Retumbo | <<locked>> | 94% | 39,508 psi | 65% | 2946 fps | 95.8% |
| Hodgdon Superformance | <<locked>> | 80% | 41,989 psi | 69% | 2910 fps | 97.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,514 psi | 45% | 1742 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 40,074 psi | 66% | 2779 fps | 96.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,992 psi | 76% | 2890 fps | 98.3% |
| IMR 4831 | <<locked>> | 80% | 39,378 psi | 65% | 2795 fps | 99.1% |
| IMR 4955 Enduron | <<locked>> | 90% | 47,877 psi | 79% | 2943 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 92% | 44,193 psi | 73% | 2972 fps | 95.1% |
| Lovex S065 | <<locked>> | 80% | 43,511 psi | 71% | 2835 fps | 98.8% |
| Lovex S070 | <<locked>> | 80% | 41,713 psi | 68% | 2815 fps | 97.6% |
| Lovex S071 | <<locked>> | 86% | 31,836 psi | 52% | 2605 fps | 95.2% |
| Norma 204 | <<locked>> | 82% | 42,612 psi | 70% | 2874 fps | 95.9% |
| Norma MRP | <<locked>> | 84% | 36,535 psi | 60% | 2825 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 40,553 psi | 67% | 2838 fps | 99.2% |
| Ramshot Grand | 68.4 gr | 92% | 43,976 psi | 72% | 2979 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 39,392 psi | 65% | 2825 fps | 97.7% |
| Ramshot Magnum | <<locked>> | 92% | 39,088 psi | 64% | 2844 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,920 psi | 46% | 1778 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,169 psi | 84% | 2989 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 48,240 psi | 79% | 3041 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 40,944 psi | 67% | 2864 fps | 99.1% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,465 psi | 65% | 2877 fps | 98.8% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 36,361 psi | 60% | 2854 fps | 95.7% |
| Rottweil R 903 | <<locked>> | 80% | 48,066 psi | 79% | 2930 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 43,758 psi | 72% | 2867 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 84% | 38,595 psi | 63% | 2805 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 44,585 psi | 73% | 2858 fps | 97.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,511 psi | 71% | 2835 fps | 98.8% |
| Shooters World SW4350 | <<locked>> | 80% | 41,713 psi | 68% | 2815 fps | 97.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,298 psi | 81% | 2989 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,733 psi | 80% | 2818 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,641 psi | 70% | 2779 fps | 97.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 40,872 psi | 67% | 2861 fps | 95.8% |
| Somchem S355 | <<locked>> | 80% | 48,138 psi | 79% | 2930 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 47,805 psi | 78% | 2913 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 37,188 psi | 61% | 2792 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 36,637 psi | 60% | 2726 fps | 95.2% |
| Vihtavuori N150 | <<locked>> | 80% | 46,006 psi | 76% | 2848 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,119 psi | 69% | 2838 fps | 99.4% |
| Vihtavuori N165 | <<locked>> | 88% | 38,667 psi | 63% | 2766 fps | 95.6% |
| Vihtavuori N550 | <<locked>> | 80% | 41,466 psi | 68% | 2838 fps | 99.2% |
| Vihtavuori N555 | <<locked>> | 80% | 32,619 psi | 54% | 2680 fps | 97.9% |
| Vihtavuori N560 | <<locked>> | 90% | 45,382 psi | 75% | 3009 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 96% | 44,773 psi | 74% | 2982 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,060 psi | 67% | 2799 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 43,033 psi | 71% | 2900 fps | 97.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,933 psi | 43% | 2575 fps | 97.2% |
| Winchester Supreme 780 | <<locked>> | 88% | 41,162 psi | 68% | 2828 fps | 95.7% |
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 77 powders for 7 mm Blaser Mag. loaded with the .285 | 139gr | Prvi Partizan SP. Winchester StaBALL HD delivers the highest muzzle velocity at 3,248 fps; across all powders the maximum-charge window runs from 1,942 fps to 3,248 fps. ADI AR 2225 gives the best case fill at 100 %, and 77 of the 77 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 139.0 gr projectile in 0.285" calls for a 1:16.0 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. Alliant Reloder-26, Accurate MAGPRO, Ramshot Grand rank at the top here: for 7 mm Blaser Mag. with the .285 | 139gr | 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.