Load Specifications
Load data in caliber 7 mm Rem. Ultra Mag. with .284 | 180gr | Sierra MatchKing bullet and 41 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ADI AR 2218, Vihtavuori N570 and IMR 8133 Enduron.
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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 82% | 56,666 psi | 89% | 2674 fps | 100% |
| Accurate 8700 | <<locked>> | 98% | 53,795 psi | 84% | 2733 fps | 99% |
| ADI AR 2213 | <<locked>> | 82% | 56,347 psi | 88% | 2776 fps | 100% |
| ADI AR 2217 | <<locked>> | 90% | 56,623 psi | 89% | 2769 fps | 100% |
| ADI AR 2218 | <<locked>> | 92% | 53,490 psi | 84% | 2835 fps | 99.5% |
| ADI AR 2225 | <<locked>> | 92% | 56,869 psi | 89% | 2789 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 82% | 56,971 psi | 89% | 2769 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 82% | 55,405 psi | 87% | 2677 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 86% | 56,797 psi | 89% | 2753 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 55,564 psi | 87% | 2808 fps | 99.5% |
| Alliant Reloder-50 | <<locked>> | 94% | 56,376 psi | 88% | 2812 fps | 99.3% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 56,347 psi | 88% | 2743 fps | 99.6% |
| Bofors RP15 | <<locked>> | 84% | 56,637 psi | 89% | 2766 fps | 100% |
| Bofors RP30 | <<locked>> | 88% | 56,608 psi | 89% | 2779 fps | 100% |
| Bofors RP5 | <<locked>> | 82% | 56,971 psi | 89% | 2769 fps | 100% |
| Hodgdon H1000 | <<locked>> | 86% | 53,911 psi | 84% | 2730 fps | 100% |
| Hodgdon H4831 SC | <<locked>> | 82% | 57,450 psi | 90% | 2749 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 56,797 psi | 89% | 2844 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,232 psi | 60% | 1798 fps | 100% |
| IMR 7828 SSC | <<locked>> | 82% | 55,143 psi | 86% | 2762 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 88% | 57,145 psi | 90% | 2703 fps | 97.5% |
| IMR 8133 Enduron | <<locked>> | 94% | 55,854 psi | 88% | 2782 fps | 100% |
| Lovex D100 | <<locked>> | 90% | 54,998 psi | 86% | 2697 fps | 96.2% |
| Lovex S071 | <<locked>> | 86% | 55,448 psi | 87% | 2657 fps | 100% |
| Norma 217 | <<locked>> | 94% | 57,653 psi | 90% | 2799 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 56,768 psi | 89% | 2785 fps | 100% |
| Ramshot LRT | <<locked>> | 94% | 57,145 psi | 90% | 2831 fps | 96.4% |
| Ramshot Magnum | <<locked>> | 84% | 55,216 psi | 87% | 2713 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,320 psi | 62% | 1837 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 57,609 psi | 90% | 2825 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 56,608 psi | 89% | 2805 fps | 100% |
| Shooters World 50 BMG | <<locked>> | 90% | 54,998 psi | 86% | 2697 fps | 96.2% |
| SNPE Vectan SP 13 | <<locked>> | 98% | 55,463 psi | 87% | 2740 fps | 98.9% |
| Vihtavuori 20N29ᴾ | <<locked>> | 100% | 52,794 psi | 83% | 2717 fps | 97.2% |
| Vihtavuori N165 | <<locked>> | 84% | 57,188 psi | 90% | 2697 fps | 100% |
| Vihtavuori N170 | <<locked>> | 88% | 57,014 psi | 89% | 2740 fps | 98.7% |
| Vihtavuori N565 | <<locked>> | 84% | 54,447 psi | 85% | 2736 fps | 100% |
| Vihtavuori N568 | <<locked>> | 88% | 56,840 psi | 89% | 2812 fps | 100% |
| Vihtavuori N570 | <<locked>> | 88% | 54,708 psi | 86% | 2818 fps | 99.1% |
| Winchester StaBALL HD | <<locked>> | 82% | 57,421 psi | 90% | 2766 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 82% | 56,710 psi | 89% | 2703 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 52,881 psi | 83% | 2625 fps | 100% |
| Accurate 8700 | <<locked>> | 90% | 40,001 psi | 63% | 2493 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 80% | 52,504 psi | 82% | 2720 fps | 100% |
| ADI AR 2217 | <<locked>> | 80% | 39,624 psi | 62% | 2493 fps | 99.1% |
| ADI AR 2218 | 82.8 gr | 84% | 39,610 psi | 62% | 2566 fps | 96% |
| ADI AR 2225 | <<locked>> | 80% | 37,028 psi | 58% | 2467 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 53,214 psi | 83% | 2713 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 51,909 psi | 81% | 2631 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 46,122 psi | 72% | 2602 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 80% | 38,218 psi | 60% | 2493 fps | 95.3% |
| Alliant Reloder-50 | <<locked>> | 86% | 41,901 psi | 66% | 2562 fps | 96.1% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 49,443 psi | 77% | 2631 fps | 98.7% |
| Bofors RP15 | <<locked>> | 80% | 49,574 psi | 78% | 2657 fps | 100% |
| Bofors RP30 | <<locked>> | 80% | 43,091 psi | 68% | 2562 fps | 99.5% |
| Bofors RP5 | <<locked>> | 80% | 53,214 psi | 83% | 2713 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 43,395 psi | 68% | 2562 fps | 99.8% |
| Hodgdon H4831 SC | <<locked>> | 80% | 53,621 psi | 84% | 2694 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 80% | 45,614 psi | 71% | 2674 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,660 psi | 45% | 1608 fps | 100% |
| IMR 7828 SSC | <<locked>> | 80% | 51,547 psi | 81% | 2710 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 82% | 47,021 psi | 74% | 2543 fps | 95.1% |
| IMR 8133 Enduron | 72.4 gr | 80% | 34,534 psi | 54% | 2398 fps | 97.5% |
| Lovex D100 | <<locked>> | 88% | 51,198 psi | 80% | 2638 fps | 95.2% |
| Lovex S071 | <<locked>> | 80% | 45,730 psi | 72% | 2516 fps | 100% |
| Norma 217 | <<locked>> | 80% | 35,302 psi | 55% | 2425 fps | 99.3% |
| Ramshot Grand | <<locked>> | 80% | 52,750 psi | 83% | 2726 fps | 100% |
| Ramshot LRT | <<locked>> | 92% | 53,084 psi | 83% | 2766 fps | 95.4% |
| Ramshot Magnum | <<locked>> | 80% | 47,601 psi | 75% | 2605 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,544 psi | 46% | 1647 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 45,788 psi | 72% | 2654 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 41,930 psi | 66% | 2562 fps | 98.5% |
| Shooters World 50 BMG | <<locked>> | 88% | 51,198 psi | 80% | 2638 fps | 95.2% |
| SNPE Vectan SP 13 | <<locked>> | 90% | 42,076 psi | 66% | 2513 fps | 95.8% |
| Vihtavuori 20N29 | <<locked>> | 96% | 45,629 psi | 72% | 2592 fps | 95.3% |
| Vihtavuori N165 | <<locked>> | 80% | 50,140 psi | 79% | 2598 fps | 100% |
| Vihtavuori N170 | <<locked>> | 80% | 43,511 psi | 68% | 2513 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 80% | 47,529 psi | 74% | 2628 fps | 99.7% |
| Vihtavuori N568 | <<locked>> | 80% | 42,786 psi | 67% | 2575 fps | 98.2% |
| Vihtavuori N570 | 77.3 gr | 80% | 40,944 psi | 64% | 2569 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 53,185 psi | 83% | 2713 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 52,953 psi | 83% | 2651 fps | 100% |
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 41 powders for 7 mm Rem. Ultra Mag. loaded with the .284 | 180gr | Sierra MatchKing. Hodgdon Retumbo delivers the highest muzzle velocity at 2,844 fps; across all powders the maximum-charge window runs from 1,798 fps to 2,844 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 41 of the 41 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 60–90 %, leaving at least 10 % headroom. The 180.0 gr projectile in 0.284" calls for a 1:10.0 twist; slower twists will usually not stabilise this weight. Hodgdon TrailBoss, ReloadSwiss RS 14, Vihtavuori 20N29 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. ADI AR 2218, Vihtavuori N570, IMR 8133 Enduron rank at the top here: for 7 mm Rem. Ultra Mag. with the .284 | 180gr | 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.