Load Specifications
Load data in caliber 7 mm Blaser Mag. with .284 | 175gr | Speer Grand Slam bullet and 71 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% | 52,069 psi | 85% | 2733 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 53,098 psi | 87% | 2756 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 54,099 psi | 89% | 2884 fps | 98.9% |
| ADI AR 2209 | <<locked>> | 88% | 53,751 psi | 88% | 2818 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 90% | 51,663 psi | 85% | 2825 fps | 99.2% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 53,069 psi | 87% | 2848 fps | 99.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 47,645 psi | 78% | 2815 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 53,867 psi | 88% | 2812 fps | 99.8% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 53,867 psi | 88% | 2812 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 84% | 53,969 psi | 89% | 2808 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 53,258 psi | 87% | 2805 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 90% | 51,996 psi | 85% | 2822 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 92% | 53,388 psi | 88% | 2792 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 52,779 psi | 87% | 2854 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 53,548 psi | 88% | 2877 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 49,501 psi | 81% | 2864 fps | 96.4% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 53,156 psi | 87% | 2789 fps | 97.2% |
| Bofors RP15 | <<locked>> | 94% | 54,650 psi | 90% | 2864 fps | 99.9% |
| Bofors RP30 | <<locked>> | 98% | 52,460 psi | 86% | 2864 fps | 99.6% |
| Bofors RP5 | <<locked>> | 90% | 51,996 psi | 85% | 2822 fps | 99.8% |
| Bofors RP7 | <<locked>> | 82% | 54,969 psi | 90% | 2753 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 54,839 psi | 90% | 2874 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 82% | 54,505 psi | 89% | 2808 fps | 100% |
| Hodgdon H4831 | <<locked>> | 90% | 55,013 psi | 90% | 2818 fps | 99.1% |
| Hodgdon H4831 SC | <<locked>> | 90% | 53,998 psi | 89% | 2805 fps | 99% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 54,215 psi | 89% | 2733 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 51,561 psi | 85% | 2930 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 54,723 psi | 90% | 2844 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,304 psi | 61% | 1745 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 53,359 psi | 88% | 2746 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 53,432 psi | 88% | 2749 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 52,489 psi | 86% | 2746 fps | 98.9% |
| IMR 7828 SSC | <<locked>> | 92% | 53,345 psi | 88% | 2861 fps | 99.4% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 43,294 psi | 71% | 2726 fps | 98.2% |
| Lovex S065 | <<locked>> | 82% | 53,708 psi | 88% | 2723 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 51,967 psi | 85% | 2720 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 53,287 psi | 87% | 2749 fps | 100% |
| Norma 204 | <<locked>> | 84% | 53,925 psi | 89% | 2799 fps | 99.8% |
| Norma 217ᴾ | <<locked>> | 100% | 43,439 psi | 71% | 2749 fps | 99.7% |
| Norma MRP | <<locked>> | 88% | 51,692 psi | 85% | 2841 fps | 100% |
| Norma URP | <<locked>> | 84% | 54,897 psi | 90% | 2785 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 54,027 psi | 89% | 2884 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 84% | 53,693 psi | 88% | 2795 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 52,170 psi | 86% | 2815 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,276 psi | 63% | 1791 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 53,098 psi | 87% | 2779 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 55,056 psi | 90% | 2858 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 52,011 psi | 85% | 2923 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 54,853 psi | 90% | 2943 fps | 99.2% |
| Rottweil R 904 | <<locked>> | 88% | 54,882 psi | 90% | 2789 fps | 99.5% |
| Rottweil R 905 | <<locked>> | 88% | 53,040 psi | 87% | 2799 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 82% | 54,969 psi | 90% | 2753 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 53,708 psi | 88% | 2723 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 51,967 psi | 85% | 2720 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 52,721 psi | 87% | 2677 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 52,634 psi | 86% | 2795 fps | 99.8% |
| Somchem S361 | <<locked>> | 86% | 52,547 psi | 86% | 2726 fps | 98.8% |
| Somchem S365 | <<locked>> | 84% | 52,272 psi | 86% | 2743 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 53,345 psi | 88% | 2769 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 53,171 psi | 87% | 2730 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 53,011 psi | 87% | 2753 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 82% | 52,272 psi | 86% | 2733 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 52,054 psi | 85% | 2769 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 51,503 psi | 85% | 2838 fps | 98.9% |
| Vihtavuori N565 | <<locked>> | 94% | 51,503 psi | 85% | 2822 fps | 99.1% |
| Vihtavuori N568 | <<locked>> | 98% | 52,069 psi | 85% | 2884 fps | 98.3% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 52,779 psi | 87% | 2936 fps | 96.8% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 52,272 psi | 86% | 2684 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 54,766 psi | 90% | 2812 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 92% | 51,213 psi | 84% | 2871 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 52,982 psi | 87% | 2762 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% | 37,173 psi | 61% | 2470 fps | 99.2% |
| Accurate 4350 | <<locked>> | 80% | 49,472 psi | 81% | 2700 fps | 100% |
| Accurate MAGPRO | <<locked>> | 82% | 40,988 psi | 67% | 2641 fps | 96% |
| ADI AR 2209 | <<locked>> | 80% | 41,133 psi | 68% | 2592 fps | 98.2% |
| ADI AR 2213 | <<locked>> | 80% | 36,869 psi | 61% | 2530 fps | 95.7% |
| ADI AR 2217 | <<locked>> | 88% | 35,723 psi | 59% | 2503 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 84% | 28,340 psi | 47% | 2352 fps | 95.4% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 41,524 psi | 68% | 2592 fps | 98.3% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 41,524 psi | 68% | 2592 fps | 98.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 47,514 psi | 78% | 2707 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 41,176 psi | 68% | 2589 fps | 98.2% |
| Alliant Reloder-22 | <<locked>> | 80% | 37,188 psi | 61% | 2539 fps | 97.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,853 psi | 59% | 2493 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,995 psi | 51% | 2418 fps | 98.4% |
| Alliant Reloder-26 | <<locked>> | 80% | 39,581 psi | 65% | 2641 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 46,122 psi | 76% | 2802 fps | 95.5% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 47,021 psi | 77% | 2680 fps | 95.7% |
| Bofors RP15 | <<locked>> | 80% | 34,534 psi | 57% | 2477 fps | 96.2% |
| Bofors RP30 | <<locked>> | 86% | 34,896 psi | 57% | 2520 fps | 95.7% |
| Bofors RP5 | <<locked>> | 80% | 37,188 psi | 61% | 2539 fps | 97.3% |
| Bofors RP7 | <<locked>> | 80% | 51,619 psi | 85% | 2700 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 84% | 34,011 psi | 56% | 2464 fps | 95.5% |
| Hodgdon H414 | <<locked>> | 80% | 50,952 psi | 84% | 2753 fps | 100% |
| Hodgdon H4831 | <<locked>> | 80% | 39,175 psi | 64% | 2530 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 80% | 38,638 psi | 63% | 2520 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 44,759 psi | 73% | 2592 fps | 100% |
| Hodgdon Retumbo | 57.4 gr | 80% | 30,385 psi | 50% | 2441 fps | 95% |
| Hodgdon Superformance | <<locked>> | 80% | 50,821 psi | 83% | 2782 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,978 psi | 46% | 1558 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 46,905 psi | 77% | 2638 fps | 99.7% |
| IMR 4831 | <<locked>> | 80% | 47,036 psi | 77% | 2651 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 40,785 psi | 67% | 2530 fps | 96.5% |
| IMR 7828 SSC | <<locked>> | 80% | 35,505 psi | 58% | 2510 fps | 95.3% |
| IMR 8133 Enduron | <<locked>> | 94% | 35,491 psi | 58% | 2552 fps | 95.7% |
| Lovex S065 | <<locked>> | 80% | 50,531 psi | 83% | 2674 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 48,849 psi | 80% | 2671 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 32,082 psi | 53% | 2352 fps | 98% |
| Norma 204 | <<locked>> | 80% | 47,253 psi | 78% | 2687 fps | 99.1% |
| Norma 217 | <<locked>> | 88% | 29,138 psi | 48% | 2405 fps | 95.3% |
| Norma MRP | <<locked>> | 80% | 38,943 psi | 64% | 2605 fps | 98.9% |
| Norma URP | <<locked>> | 80% | 48,312 psi | 79% | 2687 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 34,998 psi | 57% | 2513 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 47,181 psi | 77% | 2690 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 31,256 psi | 51% | 2398 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,718 psi | 47% | 1598 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 49,588 psi | 81% | 2726 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 47,776 psi | 78% | 2746 fps | 100% |
| ReloadSwiss RS 76 | 61.4 gr | 80% | 29,312 psi | 48% | 2411 fps | 95.8% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 37,724 psi | 62% | 2618 fps | 95.1% |
| Rottweil R 904 | <<locked>> | 80% | 42,366 psi | 70% | 2569 fps | 97.5% |
| Rottweil R 905 | <<locked>> | 80% | 40,640 psi | 67% | 2575 fps | 98.2% |
| Rottweil R 907 | <<locked>> | 80% | 51,619 psi | 85% | 2700 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 50,531 psi | 83% | 2674 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 48,849 psi | 80% | 2671 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 49,458 psi | 81% | 2628 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 40,306 psi | 66% | 2572 fps | 98.1% |
| Somchem S361 | <<locked>> | 80% | 43,221 psi | 71% | 2562 fps | 97% |
| Somchem S365 | <<locked>> | 80% | 45,542 psi | 75% | 2641 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 41,278 psi | 68% | 2559 fps | 98.9% |
| Vihtavuori N160 | <<locked>> | 80% | 49,690 psi | 82% | 2677 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 35,694 psi | 59% | 2434 fps | 97.3% |
| Vihtavuori N550 | <<locked>> | 80% | 49,139 psi | 81% | 2687 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 40,132 psi | 66% | 2566 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 38,986 psi | 64% | 2595 fps | 96% |
| Vihtavuori N565 | <<locked>> | 84% | 36,796 psi | 60% | 2536 fps | 95.5% |
| Vihtavuori N568 | <<locked>> | 92% | 42,076 psi | 69% | 2697 fps | 95.9% |
| Vihtavuori N570 | <<locked>> | 98% | 49,124 psi | 81% | 2871 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 48,878 psi | 80% | 2638 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 51,169 psi | 84% | 2756 fps | 100% |
| Winchester StaBALL HD | 58.9 gr | 80% | 32,300 psi | 53% | 2533 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 37,579 psi | 62% | 2484 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 71 powders for 7 mm Blaser Mag. loaded with the .284 | 175gr | Speer Grand Slam. ReloadSwiss RS 80 delivers the highest muzzle velocity at 2,943 fps; across all powders the maximum-charge window runs from 1,745 fps to 2,943 fps. ADI AR 2217 gives the best case fill at 100 %, and 71 of the 71 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 175.0 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-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 .284 | 175gr | Speer Grand Slam 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.