Load Specifications
Load data in caliber 7 mm Blaser Mag. with .285 | 173gr | Prvi Partizan SP bullet and 69 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ReloadSwiss RS 76 and Winchester StaBALL HD.
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>> | 90% | 52,286 psi | 86% | 2756 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 53,229 psi | 87% | 2776 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 54,476 psi | 89% | 2907 fps | 98.9% |
| ADI AR 2209 | <<locked>> | 88% | 53,983 psi | 89% | 2838 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 90% | 51,851 psi | 85% | 2844 fps | 99.2% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 53,345 psi | 88% | 2871 fps | 99.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 47,921 psi | 79% | 2835 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 54,346 psi | 89% | 2831 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 53,519 psi | 88% | 2828 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 90% | 52,185 psi | 86% | 2844 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 92% | 53,621 psi | 88% | 2815 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 52,881 psi | 87% | 2874 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 53,708 psi | 88% | 2897 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 49,879 psi | 82% | 2887 fps | 96.5% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 53,214 psi | 87% | 2808 fps | 97.2% |
| Bofors RP15 | <<locked>> | 94% | 54,795 psi | 90% | 2884 fps | 99.9% |
| Bofors RP30 | <<locked>> | 98% | 52,562 psi | 86% | 2881 fps | 99.6% |
| Bofors RP5 | <<locked>> | 90% | 52,185 psi | 86% | 2844 fps | 99.8% |
| Bofors RP7 | <<locked>> | 82% | 55,071 psi | 90% | 2772 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 54,882 psi | 90% | 2894 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 82% | 54,549 psi | 90% | 2828 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 51,547 psi | 85% | 2782 fps | 98.7% |
| Hodgdon H4831 SC | <<locked>> | 90% | 54,172 psi | 89% | 2825 fps | 99% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 54,549 psi | 90% | 2756 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 51,938 psi | 85% | 2953 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 54,926 psi | 90% | 2864 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,318 psi | 61% | 1762 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 53,417 psi | 88% | 2762 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 53,490 psi | 88% | 2766 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 52,707 psi | 87% | 2769 fps | 98.9% |
| IMR 7828 SSC | <<locked>> | 92% | 53,534 psi | 88% | 2884 fps | 99.4% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 43,381 psi | 71% | 2746 fps | 98.2% |
| Lovex S065 | <<locked>> | 82% | 53,867 psi | 88% | 2743 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 52,330 psi | 86% | 2743 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 53,490 psi | 88% | 2772 fps | 100% |
| Norma 204 | <<locked>> | 84% | 54,201 psi | 89% | 2818 fps | 99.8% |
| Norma 217ᴾ | <<locked>> | 100% | 43,787 psi | 72% | 2772 fps | 99.7% |
| Norma MRP | <<locked>> | 88% | 51,938 psi | 85% | 2861 fps | 100% |
| Norma URP | <<locked>> | 82% | 51,866 psi | 85% | 2759 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 54,172 psi | 89% | 2904 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 84% | 53,983 psi | 89% | 2818 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 52,518 psi | 86% | 2835 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,276 psi | 63% | 1804 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 53,156 psi | 87% | 2799 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 51,561 psi | 85% | 2825 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 52,243 psi | 86% | 2946 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 51,111 psi | 84% | 2897 fps | 98.6% |
| Rottweil R 904 | <<locked>> | 88% | 54,882 psi | 90% | 2805 fps | 99.5% |
| Rottweil R 905 | <<locked>> | 88% | 53,055 psi | 87% | 2818 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 82% | 55,071 psi | 90% | 2772 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 53,867 psi | 88% | 2743 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 52,330 psi | 86% | 2743 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 52,823 psi | 87% | 2697 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 52,649 psi | 86% | 2812 fps | 99.8% |
| Somchem S361 | <<locked>> | 86% | 52,692 psi | 87% | 2746 fps | 98.8% |
| Somchem S365 | <<locked>> | 84% | 52,373 psi | 86% | 2762 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 53,548 psi | 88% | 2789 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 53,301 psi | 88% | 2749 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 53,214 psi | 87% | 2776 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 82% | 52,562 psi | 86% | 2756 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 52,301 psi | 86% | 2789 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 51,677 psi | 85% | 2858 fps | 98.9% |
| Vihtavuori N565 | <<locked>> | 94% | 51,808 psi | 85% | 2844 fps | 99.1% |
| Vihtavuori N568 | <<locked>> | 98% | 52,315 psi | 86% | 2904 fps | 98.3% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 53,040 psi | 87% | 2956 fps | 96.8% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 52,504 psi | 86% | 2707 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 54,824 psi | 90% | 2831 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 51,663 psi | 85% | 2894 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 53,417 psi | 88% | 2785 fps | 99.8% |
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% | 37,478 psi | 62% | 2490 fps | 99.2% |
| Accurate 4350 | <<locked>> | 80% | 49,835 psi | 82% | 2723 fps | 100% |
| Accurate MAGPRO | <<locked>> | 82% | 41,031 psi | 67% | 2657 fps | 95.9% |
| ADI AR 2209 | <<locked>> | 80% | 41,263 psi | 68% | 2612 fps | 98.2% |
| ADI AR 2213 | <<locked>> | 80% | 36,956 psi | 61% | 2546 fps | 95.6% |
| ADI AR 2217 | <<locked>> | 88% | 35,737 psi | 59% | 2520 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 84% | 28,514 psi | 47% | 2372 fps | 95.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 47,500 psi | 78% | 2726 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 41,481 psi | 68% | 2608 fps | 98.2% |
| Alliant Reloder-22 | <<locked>> | 80% | 37,289 psi | 61% | 2556 fps | 97.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 36,013 psi | 59% | 2513 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 31,096 psi | 51% | 2438 fps | 98.4% |
| Alliant Reloder-26 | <<locked>> | 80% | 39,827 psi | 65% | 2664 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 46,296 psi | 76% | 2818 fps | 95.4% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 47,137 psi | 77% | 2697 fps | 95.7% |
| Bofors RP15 | <<locked>> | 80% | 34,664 psi | 57% | 2493 fps | 96.2% |
| Bofors RP30 | <<locked>> | 86% | 35,099 psi | 58% | 2539 fps | 95.7% |
| Bofors RP5 | <<locked>> | 80% | 37,289 psi | 61% | 2556 fps | 97.3% |
| Bofors RP7 | <<locked>> | 80% | 51,779 psi | 85% | 2720 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 84% | 34,069 psi | 56% | 2480 fps | 95.5% |
| Hodgdon H414 | <<locked>> | 80% | 51,285 psi | 84% | 2776 fps | 100% |
| Hodgdon H4831 | <<locked>> | 80% | 39,479 psi | 65% | 2552 fps | 95.9% |
| Hodgdon H4831 SC | <<locked>> | 80% | 38,740 psi | 64% | 2539 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 44,933 psi | 74% | 2608 fps | 100% |
| Hodgdon Retumbo | 59.5 gr | 82% | 32,489 psi | 53% | 2520 fps | 96.1% |
| Hodgdon Superformance | <<locked>> | 80% | 51,068 psi | 84% | 2805 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,108 psi | 46% | 1575 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 47,036 psi | 77% | 2657 fps | 99.6% |
| IMR 4831 | <<locked>> | 80% | 47,166 psi | 77% | 2667 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 40,886 psi | 67% | 2549 fps | 96.5% |
| IMR 7828 SSC | <<locked>> | 80% | 35,636 psi | 59% | 2526 fps | 95.2% |
| IMR 8133 Enduron | <<locked>> | 94% | 35,621 psi | 58% | 2572 fps | 95.7% |
| Lovex S065 | <<locked>> | 80% | 50,676 psi | 83% | 2694 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 48,994 psi | 80% | 2690 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 32,242 psi | 53% | 2372 fps | 98% |
| Norma 204 | <<locked>> | 80% | 47,355 psi | 78% | 2703 fps | 99.1% |
| Norma 217 | <<locked>> | 88% | 29,341 psi | 48% | 2425 fps | 95.3% |
| Norma MRP | <<locked>> | 80% | 39,233 psi | 64% | 2628 fps | 98.9% |
| Norma URP | <<locked>> | 80% | 48,457 psi | 80% | 2707 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 35,259 psi | 58% | 2533 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 47,239 psi | 78% | 2710 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 31,473 psi | 52% | 2418 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,645 psi | 47% | 1611 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 49,647 psi | 82% | 2746 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 47,834 psi | 79% | 2766 fps | 100% |
| ReloadSwiss RS 76 | 62.1 gr | 80% | 29,341 psi | 48% | 2428 fps | 95.7% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 37,985 psi | 62% | 2641 fps | 95.1% |
| Rottweil R 904 | <<locked>> | 80% | 42,511 psi | 70% | 2589 fps | 97.5% |
| Rottweil R 905 | <<locked>> | 80% | 40,770 psi | 67% | 2595 fps | 98.2% |
| Rottweil R 907 | <<locked>> | 80% | 51,779 psi | 85% | 2720 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 50,676 psi | 83% | 2694 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 48,994 psi | 80% | 2690 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 49,617 psi | 81% | 2648 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 40,480 psi | 66% | 2592 fps | 98.1% |
| Somchem S361 | <<locked>> | 80% | 43,265 psi | 71% | 2579 fps | 96.9% |
| Somchem S365 | <<locked>> | 80% | 45,745 psi | 75% | 2661 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 41,365 psi | 68% | 2575 fps | 98.9% |
| Vihtavuori N160 | <<locked>> | 80% | 50,053 psi | 82% | 2700 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 35,998 psi | 59% | 2457 fps | 97.4% |
| Vihtavuori N550 | <<locked>> | 80% | 49,226 psi | 81% | 2703 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 40,277 psi | 66% | 2585 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 39,262 psi | 64% | 2618 fps | 96% |
| Vihtavuori N565 | <<locked>> | 84% | 36,985 psi | 61% | 2556 fps | 95.5% |
| Vihtavuori N568 | <<locked>> | 92% | 42,351 psi | 70% | 2720 fps | 96% |
| Vihtavuori N570 | <<locked>> | 98% | 49,371 psi | 81% | 2894 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 48,936 psi | 80% | 2654 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 51,285 psi | 84% | 2776 fps | 100% |
| Winchester StaBALL HD | 59.6 gr | 80% | 32,460 psi | 53% | 2549 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 37,869 psi | 62% | 2507 fps | 97.3% |
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 69 powders for 7 mm Blaser Mag. loaded with the .285 | 173gr | Prvi Partizan SP. Vihtavuori N570 delivers the highest muzzle velocity at 2,956 fps; across all powders the maximum-charge window runs from 1,762 fps to 2,956 fps. ADI AR 2217 gives the best case fill at 100 %, and 69 of the 69 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 173.0 gr projectile in 0.285" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-33 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. Hodgdon Retumbo, ReloadSwiss RS 76, Winchester StaBALL HD rank at the top here: for 7 mm Blaser Mag. with the .285 | 173gr | 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.