Load Specifications
Load data in caliber 7 mm Blaser Mag. with .284 | 183gr | Sierra MatchKing bullet and 70 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 Vihtavuori N560.
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>> | 92% | 53,650 psi | 88% | 2684 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 55,071 psi | 90% | 2710 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 52,257 psi | 86% | 2785 fps | 98.7% |
| ADI AR 2209 | <<locked>> | 88% | 52,069 psi | 85% | 2720 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 92% | 53,403 psi | 88% | 2782 fps | 99.5% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 51,169 psi | 84% | 2743 fps | 99.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 45,745 psi | 75% | 2713 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 52,446 psi | 86% | 2713 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 51,706 psi | 85% | 2710 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 92% | 53,621 psi | 88% | 2779 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 94% | 54,940 psi | 90% | 2743 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 54,259 psi | 89% | 2805 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 51,387 psi | 84% | 2779 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 47,355 psi | 78% | 2759 fps | 96% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 55,027 psi | 90% | 2746 fps | 97.6% |
| Bofors RP15 | <<locked>> | 94% | 52,837 psi | 87% | 2766 fps | 99.8% |
| Bofors RP30ᴾ | <<locked>> | 100% | 53,954 psi | 89% | 2818 fps | 99.8% |
| Bofors RP5 | <<locked>> | 92% | 53,621 psi | 88% | 2779 fps | 99.9% |
| Bofors RP7 | <<locked>> | 82% | 53,563 psi | 88% | 2657 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 52,852 psi | 87% | 2772 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 82% | 53,026 psi | 87% | 2713 fps | 100% |
| Hodgdon H4831 | <<locked>> | 90% | 53,229 psi | 87% | 2720 fps | 99% |
| Hodgdon H4831 SC | <<locked>> | 90% | 52,185 psi | 86% | 2703 fps | 98.9% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 52,605 psi | 86% | 2638 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 53,142 psi | 87% | 2884 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 53,040 psi | 87% | 2746 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,217 psi | 61% | 1683 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 52,011 psi | 85% | 2651 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 55,027 psi | 90% | 2680 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 51,895 psi | 85% | 2654 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 54,476 psi | 89% | 2703 fps | 99.2% |
| IMR 7828 SSC | <<locked>> | 94% | 55,013 psi | 90% | 2815 fps | 99.6% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 41,365 psi | 68% | 2628 fps | 97.9% |
| Lovex S065 | <<locked>> | 82% | 52,315 psi | 86% | 2628 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 54,070 psi | 89% | 2677 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 55,042 psi | 90% | 2703 fps | 100% |
| Norma 204 | <<locked>> | 84% | 52,518 psi | 86% | 2700 fps | 99.7% |
| Norma 217ᴾ | <<locked>> | 100% | 41,669 psi | 68% | 2654 fps | 99.5% |
| Norma MRP | <<locked>> | 90% | 53,374 psi | 88% | 2795 fps | 100% |
| Norma URP | <<locked>> | 84% | 53,577 psi | 88% | 2694 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 52,054 psi | 85% | 2779 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 84% | 52,243 psi | 86% | 2700 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 54,186 psi | 89% | 2772 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,232 psi | 63% | 1726 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 55,071 psi | 90% | 2733 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 53,084 psi | 87% | 2759 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 53,432 psi | 88% | 2877 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 52,286 psi | 86% | 2835 fps | 98.9% |
| Rottweil R 904 | <<locked>> | 88% | 53,258 psi | 87% | 2690 fps | 99.4% |
| Rottweil R 905 | <<locked>> | 90% | 54,708 psi | 90% | 2749 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 82% | 53,563 psi | 88% | 2657 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 52,315 psi | 86% | 2628 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 54,070 psi | 89% | 2677 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 54,795 psi | 90% | 2635 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 54,288 psi | 89% | 2746 fps | 99.9% |
| Somchem S361 | <<locked>> | 88% | 54,621 psi | 90% | 2684 fps | 99.1% |
| Somchem S365 | <<locked>> | 86% | 53,969 psi | 89% | 2694 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 51,837 psi | 85% | 2674 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 51,576 psi | 85% | 2631 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 54,897 psi | 90% | 2710 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 54,273 psi | 89% | 2690 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 53,679 psi | 88% | 2720 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 53,200 psi | 87% | 2795 fps | 99.2% |
| Vihtavuori N565 | <<locked>> | 96% | 53,011 psi | 87% | 2779 fps | 99.3% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 53,417 psi | 88% | 2838 fps | 98.7% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 50,604 psi | 83% | 2831 fps | 96.5% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 54,244 psi | 89% | 2641 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 53,026 psi | 87% | 2713 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 52,736 psi | 87% | 2825 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 54,940 psi | 90% | 2720 fps | 99.9% |
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% | 36,042 psi | 59% | 2385 fps | 99.1% |
| Accurate 4350 | <<locked>> | 80% | 48,095 psi | 79% | 2608 fps | 100% |
| Accurate MAGPRO | <<locked>> | 82% | 39,494 psi | 65% | 2546 fps | 95.7% |
| ADI AR 2209 | <<locked>> | 80% | 39,987 psi | 66% | 2503 fps | 98.1% |
| ADI AR 2213 | <<locked>> | 80% | 35,737 psi | 59% | 2441 fps | 95.4% |
| ADI AR 2217 | <<locked>> | 88% | 34,505 psi | 57% | 2411 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 84% | 27,485 psi | 45% | 2270 fps | 95.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 46,021 psi | 76% | 2612 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 40,045 psi | 66% | 2500 fps | 98.1% |
| Alliant Reloder-22 | <<locked>> | 80% | 35,926 psi | 59% | 2451 fps | 97.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 34,592 psi | 57% | 2408 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,052 psi | 49% | 2336 fps | 98.3% |
| Alliant Reloder-26 | <<locked>> | 80% | 38,000 psi | 62% | 2549 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 44,164 psi | 73% | 2697 fps | 95% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 45,629 psi | 75% | 2582 fps | 95.4% |
| Bofors RP15 | <<locked>> | 80% | 33,417 psi | 55% | 2392 fps | 96.1% |
| Bofors RP30 | <<locked>> | 86% | 33,576 psi | 55% | 2428 fps | 95.5% |
| Bofors RP5 | <<locked>> | 80% | 35,926 psi | 59% | 2451 fps | 97.1% |
| Bofors RP7 | <<locked>> | 80% | 50,357 psi | 83% | 2608 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 84% | 32,909 psi | 54% | 2372 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 80% | 49,603 psi | 81% | 2657 fps | 100% |
| Hodgdon H4831 | <<locked>> | 80% | 38,029 psi | 62% | 2444 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 80% | 37,463 psi | 62% | 2431 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 43,555 psi | 72% | 2500 fps | 100% |
| Hodgdon Retumbo | 55.1 gr | 82% | 31,285 psi | 51% | 2411 fps | 95.9% |
| Hodgdon Superformance | <<locked>> | 80% | 49,269 psi | 81% | 2690 fps | 99.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,905 psi | 46% | 1503 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 45,788 psi | 75% | 2549 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 51,808 psi | 85% | 2631 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 45,527 psi | 75% | 2556 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 39,769 psi | 65% | 2444 fps | 96.4% |
| IMR 7828 SSC | <<locked>> | 80% | 34,360 psi | 56% | 2418 fps | 95% |
| IMR 8133 Enduron | <<locked>> | 94% | 34,040 psi | 56% | 2461 fps | 95.4% |
| Lovex S065 | <<locked>> | 80% | 49,240 psi | 81% | 2582 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 47,630 psi | 78% | 2579 fps | 99.9% |
| Lovex S071 | <<locked>> | 80% | 31,140 psi | 51% | 2274 fps | 97.9% |
| Norma 204 | <<locked>> | 80% | 45,832 psi | 75% | 2592 fps | 99% |
| Norma 217 | <<locked>> | 88% | 28,094 psi | 46% | 2320 fps | 95% |
| Norma MRP | <<locked>> | 80% | 37,550 psi | 62% | 2513 fps | 98.8% |
| Norma URP | <<locked>> | 80% | 46,963 psi | 77% | 2595 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 33,968 psi | 56% | 2425 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 45,716 psi | 75% | 2598 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 30,226 psi | 50% | 2313 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,674 psi | 47% | 1542 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 48,066 psi | 79% | 2631 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 46,122 psi | 76% | 2654 fps | 100% |
| ReloadSwiss RS 76 | 57.6 gr | 80% | 28,311 psi | 46% | 2326 fps | 95.5% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 38,798 psi | 64% | 2585 fps | 95.7% |
| Rottweil R 904 | <<locked>> | 80% | 41,263 psi | 68% | 2480 fps | 97.4% |
| Rottweil R 905 | <<locked>> | 80% | 39,465 psi | 65% | 2487 fps | 98.1% |
| Rottweil R 907 | <<locked>> | 80% | 50,357 psi | 83% | 2608 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 49,240 psi | 81% | 2582 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 47,630 psi | 78% | 2579 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 48,182 psi | 79% | 2536 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 39,131 psi | 64% | 2484 fps | 98% |
| Somchem S361 | <<locked>> | 80% | 41,989 psi | 69% | 2470 fps | 96.8% |
| Somchem S365 | <<locked>> | 80% | 44,164 psi | 73% | 2552 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,016 psi | 66% | 2467 fps | 98.8% |
| Vihtavuori N160 | <<locked>> | 80% | 48,414 psi | 79% | 2585 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 34,708 psi | 57% | 2352 fps | 97.2% |
| Vihtavuori N550 | <<locked>> | 80% | 47,819 psi | 79% | 2595 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 38,957 psi | 64% | 2480 fps | 100% |
| Vihtavuori N560 | 55.8 gr | 80% | 37,681 psi | 62% | 2503 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 84% | 35,505 psi | 58% | 2448 fps | 95.3% |
| Vihtavuori N568 | <<locked>> | 92% | 40,364 psi | 66% | 2598 fps | 95.6% |
| Vihtavuori N570 | <<locked>> | 98% | 47,166 psi | 77% | 2769 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 47,514 psi | 78% | 2546 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 49,850 psi | 82% | 2664 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 30,734 psi | 50% | 2441 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 36,477 psi | 60% | 2398 fps | 97.1% |
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 | 183gr | Sierra MatchKing. Hodgdon Retumbo delivers the highest muzzle velocity at 2,884 fps; across all powders the maximum-charge window runs from 1,683 fps to 2,884 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 183.0 gr projectile in 0.284" calls for a 1:8.5 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, Vihtavuori N560 rank at the top here: for 7 mm Blaser Mag. with the .284 | 183gr | Sierra MatchKing 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.