Load Specifications
Load data in caliber 7 mm Blaser Mag. with .284 | 158gr | Prvi Partizan Grom bullet and 70 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate MAGPRO, Ramshot Grand 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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Max Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 94% | 54,317 psi | 89% | 2900 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 52,112 psi | 86% | 2877 fps | 100% |
| Accurate MAGPRO | <<locked>> | 92% | 52,765 psi | 87% | 2992 fps | 97.7% |
| ADI AR 2209 | <<locked>> | 90% | 52,823 psi | 87% | 2933 fps | 99.3% |
| ADI AR 2213 | <<locked>> | 94% | 54,085 psi | 89% | 2995 fps | 98.8% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 48,515 psi | 80% | 2890 fps | 98.1% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 43,308 psi | 71% | 2851 fps | 99.5% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 53,214 psi | 87% | 2933 fps | 99.3% |
| Alliant Reloder-16 | <<locked>> | 86% | 52,968 psi | 87% | 2933 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 53,838 psi | 88% | 2946 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 52,591 psi | 86% | 2923 fps | 99.3% |
| Alliant Reloder-22 | <<locked>> | 94% | 54,056 psi | 89% | 2992 fps | 99.5% |
| Alliant Reloder-23 | <<locked>> | 94% | 51,677 psi | 85% | 2910 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 54,563 psi | 90% | 3025 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 51,750 psi | 85% | 2995 fps | 100% |
| Bofors RP15 | <<locked>> | 96% | 53,272 psi | 87% | 2976 fps | 99.4% |
| Bofors RP30ᴾ | <<locked>> | 100% | 50,647 psi | 83% | 2963 fps | 98.7% |
| Bofors RP5 | <<locked>> | 94% | 54,056 psi | 89% | 2992 fps | 99.5% |
| Bofors RP7 | <<locked>> | 84% | 54,650 psi | 90% | 2877 fps | 99.8% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 53,563 psi | 88% | 2979 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 84% | 53,635 psi | 88% | 2930 fps | 99.9% |
| Hodgdon H4350 | <<locked>> | 82% | 52,953 psi | 87% | 2887 fps | 99.4% |
| Hodgdon H4831 | <<locked>> | 92% | 54,070 psi | 89% | 2930 fps | 98.2% |
| Hodgdon H4831 SC | <<locked>> | 92% | 53,069 psi | 87% | 2913 fps | 98% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 53,330 psi | 88% | 2858 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 53,534 psi | 88% | 3097 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 53,983 psi | 89% | 2969 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,101 psi | 61% | 1831 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 52,794 psi | 87% | 2864 fps | 99.7% |
| IMR 4451 Enduron | <<locked>> | 82% | 52,765 psi | 87% | 2851 fps | 99.8% |
| IMR 4831 | <<locked>> | 86% | 52,518 psi | 86% | 2871 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 51,953 psi | 85% | 2861 fps | 98% |
| IMR 7828 SSC | <<locked>> | 94% | 52,025 psi | 85% | 2972 fps | 98.5% |
| Lovex S065 | <<locked>> | 84% | 53,316 psi | 88% | 2848 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 54,694 psi | 90% | 2894 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 52,025 psi | 85% | 2864 fps | 100% |
| Norma 204 | <<locked>> | 86% | 53,417 psi | 88% | 2917 fps | 99.2% |
| Norma 217ᴾ | <<locked>> | 100% | 38,812 psi | 64% | 2776 fps | 98% |
| Norma MRP | <<locked>> | 92% | 53,838 psi | 88% | 3012 fps | 100% |
| Norma URP | <<locked>> | 86% | 54,041 psi | 89% | 2913 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 52,431 psi | 86% | 2989 fps | 98.9% |
| Ramshot Hunter | <<locked>> | 86% | 52,982 psi | 87% | 2920 fps | 100% |
| Ramshot Magnum | <<locked>> | 98% | 54,621 psi | 90% | 2982 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,782 psi | 62% | 1873 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 51,895 psi | 85% | 2900 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 53,925 psi | 89% | 2986 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 54,172 psi | 89% | 3094 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 48,936 psi | 80% | 2972 fps | 97.2% |
| Rottweil R 904 | <<locked>> | 90% | 54,012 psi | 89% | 2900 fps | 98.7% |
| Rottweil R 905 | <<locked>> | 90% | 52,025 psi | 85% | 2913 fps | 99.3% |
| Rottweil R 907 | <<locked>> | 84% | 54,650 psi | 90% | 2877 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 84% | 53,316 psi | 88% | 2848 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 54,694 psi | 90% | 2894 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 52,446 psi | 86% | 2799 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 55,071 psi | 90% | 2966 fps | 99.6% |
| Somchem S361 | <<locked>> | 88% | 52,011 psi | 85% | 2838 fps | 97.8% |
| Somchem S365 | <<locked>> | 88% | 54,491 psi | 89% | 2917 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 52,344 psi | 86% | 2884 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 82% | 53,185 psi | 87% | 2792 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 52,475 psi | 86% | 2854 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 51,953 psi | 85% | 2864 fps | 99.5% |
| Vihtavuori N550 | <<locked>> | 86% | 55,013 psi | 90% | 2910 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 54,070 psi | 89% | 2936 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 53,722 psi | 88% | 3005 fps | 98.4% |
| Vihtavuori N565 | <<locked>> | 98% | 53,432 psi | 88% | 2982 fps | 98.5% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 50,270 psi | 83% | 2979 fps | 96.9% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 51,634 psi | 85% | 2808 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 53,882 psi | 88% | 2933 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 96% | 52,750 psi | 87% | 3048 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 52,243 psi | 86% | 2877 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% | 33,837 psi | 56% | 2510 fps | 97.5% |
| Accurate 4350 | <<locked>> | 80% | 45,353 psi | 74% | 2766 fps | 100% |
| Accurate MAGPRO | 65.1 gr | 86% | 42,772 psi | 70% | 2802 fps | 95.2% |
| ADI AR 2209 | <<locked>> | 80% | 37,855 psi | 62% | 2638 fps | 96.1% |
| ADI AR 2213 | <<locked>> | 86% | 41,394 psi | 68% | 2749 fps | 95.8% |
| ADI AR 2217 | <<locked>> | 94% | 39,784 psi | 65% | 2707 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 90% | 31,328 psi | 51% | 2543 fps | 95.3% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 38,189 psi | 63% | 2638 fps | 96.2% |
| Alliant Reloder-16 | <<locked>> | 80% | 43,395 psi | 71% | 2772 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 50,154 psi | 82% | 2890 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 37,840 psi | 62% | 2635 fps | 96.1% |
| Alliant Reloder-22 | <<locked>> | 82% | 36,143 psi | 59% | 2635 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 32,503 psi | 53% | 2543 fps | 99.7% |
| Alliant Reloder-25 | <<locked>> | 80% | 28,311 psi | 46% | 2444 fps | 95.8% |
| Alliant Reloder-26 | 61.2 gr | 80% | 35,418 psi | 58% | 2677 fps | 99.2% |
| Bofors RP15 | <<locked>> | 84% | 35,853 psi | 59% | 2625 fps | 95.4% |
| Bofors RP30 | <<locked>> | 92% | 38,537 psi | 63% | 2723 fps | 95.8% |
| Bofors RP5 | <<locked>> | 82% | 36,143 psi | 59% | 2635 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 48,196 psi | 79% | 2769 fps | 99.2% |
| Hodgdon H1000 | <<locked>> | 90% | 38,101 psi | 63% | 2671 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 80% | 47,021 psi | 77% | 2815 fps | 99.4% |
| Hodgdon H4350 | <<locked>> | 80% | 49,719 psi | 82% | 2831 fps | 99% |
| Hodgdon H4831 | <<locked>> | 84% | 41,234 psi | 68% | 2694 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 86% | 43,410 psi | 71% | 2736 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 41,104 psi | 67% | 2657 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 33,591 psi | 55% | 2644 fps | 95% |
| Hodgdon Superformance | <<locked>> | 80% | 46,485 psi | 76% | 2841 fps | 99.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,789 psi | 46% | 1637 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 43,569 psi | 72% | 2700 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 49,603 psi | 81% | 2795 fps | 99.6% |
| IMR 4831 | <<locked>> | 80% | 43,308 psi | 71% | 2713 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 40,306 psi | 66% | 2635 fps | 95% |
| IMR 7828 SSC | <<locked>> | 86% | 39,769 psi | 65% | 2723 fps | 95.4% |
| Lovex S065 | <<locked>> | 80% | 47,123 psi | 77% | 2746 fps | 99.9% |
| Lovex S070 | <<locked>> | 80% | 45,397 psi | 75% | 2733 fps | 99.3% |
| Lovex S071 | <<locked>> | 80% | 29,138 psi | 48% | 2385 fps | 95.6% |
| Norma 204 | <<locked>> | 80% | 43,613 psi | 72% | 2740 fps | 97.6% |
| Norma 217 | <<locked>> | 94% | 31,850 psi | 52% | 2592 fps | 95.1% |
| Norma MRP | <<locked>> | 80% | 35,215 psi | 58% | 2641 fps | 96.8% |
| Norma URP | <<locked>> | 80% | 44,527 psi | 73% | 2753 fps | 100% |
| Ramshot Grand | 63.3 gr | 86% | 39,320 psi | 65% | 2730 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 43,410 psi | 71% | 2749 fps | 99.4% |
| Ramshot Magnum | <<locked>> | 84% | 32,706 psi | 54% | 2543 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,456 psi | 47% | 1677 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 45,411 psi | 75% | 2789 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 43,395 psi | 71% | 2802 fps | 99.9% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 32,808 psi | 54% | 2621 fps | 96% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 42,119 psi | 69% | 2835 fps | 95.2% |
| Rottweil R 904 | <<locked>> | 80% | 39,218 psi | 64% | 2618 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 80% | 37,202 psi | 61% | 2618 fps | 96.1% |
| Rottweil R 907 | <<locked>> | 80% | 48,196 psi | 79% | 2769 fps | 99.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 47,123 psi | 77% | 2746 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 80% | 45,397 psi | 75% | 2733 fps | 99.3% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 46,137 psi | 76% | 2694 fps | 99.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 36,869 psi | 61% | 2615 fps | 96% |
| Somchem S361 | <<locked>> | 82% | 42,757 psi | 70% | 2667 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 41,466 psi | 68% | 2707 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 37,869 psi | 62% | 2605 fps | 97.2% |
| Vihtavuori N150 | <<locked>> | 80% | 49,937 psi | 82% | 2743 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 45,905 psi | 75% | 2746 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 35,041 psi | 58% | 2533 fps | 95.9% |
| Vihtavuori N550 | <<locked>> | 80% | 45,397 psi | 75% | 2753 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 36,463 psi | 60% | 2618 fps | 99.6% |
| Vihtavuori N560 | <<locked>> | 84% | 40,799 psi | 67% | 2756 fps | 95.2% |
| Vihtavuori N565 | <<locked>> | 90% | 40,828 psi | 67% | 2746 fps | 95.6% |
| Vihtavuori N568 | <<locked>> | 96% | 43,656 psi | 72% | 2851 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 45,092 psi | 74% | 2710 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 47,224 psi | 78% | 2822 fps | 99.5% |
| Winchester StaBALL HD | <<locked>> | 80% | 28,877 psi | 47% | 2556 fps | 99.8% |
| Winchester Supreme 780 | <<locked>> | 82% | 36,970 psi | 61% | 2585 fps | 95.9% |
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 70 powders for 7 mm Blaser Mag. loaded with the .284 | 158gr | Prvi Partizan Grom. Hodgdon Retumbo delivers the highest muzzle velocity at 3,097 fps; across all powders the maximum-charge window runs from 1,831 fps to 3,097 fps. ADI AR 2217 gives the best case fill at 100 %, and 70 of the 70 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 158.0 gr projectile in 0.284" calls for a 1:11.0 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, Ramshot Grand, Alliant Reloder-26 rank at the top here: for 7 mm Blaser Mag. with the .284 | 158gr | Prvi Partizan Grom 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.