Load Specifications
Load data in caliber 7 mm Rem. Ultra Mag. with .284 | 168gr | Sierra MatchKing bullet and 42 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 Alliant Reloder-50.
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% | 55,201 psi | 87% | 2733 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 56,246 psi | 88% | 2838 fps | 99% |
| ADI AR 2213 | <<locked>> | 82% | 54,766 psi | 86% | 2831 fps | 100% |
| ADI AR 2217 | <<locked>> | 90% | 54,853 psi | 86% | 2822 fps | 100% |
| ADI AR 2218 | <<locked>> | 94% | 55,898 psi | 88% | 2946 fps | 99.5% |
| ADI AR 2225 | <<locked>> | 92% | 55,071 psi | 86% | 2844 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 82% | 55,434 psi | 87% | 2825 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 82% | 53,954 psi | 85% | 2736 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 86% | 55,027 psi | 86% | 2812 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 53,838 psi | 84% | 2854 fps | 98.9% |
| Alliant Reloder-50 | <<locked>> | 94% | 54,404 psi | 85% | 2854 fps | 98.7% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 54,998 psi | 86% | 2792 fps | 99.1% |
| Bofors RP15 | <<locked>> | 84% | 55,085 psi | 86% | 2822 fps | 100% |
| Bofors RP30 | <<locked>> | 88% | 55,114 psi | 86% | 2838 fps | 100% |
| Bofors RP5 | <<locked>> | 82% | 55,434 psi | 87% | 2825 fps | 100% |
| Hodgdon H1000 | <<locked>> | 88% | 56,217 psi | 88% | 2838 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 56,971 psi | 89% | 2818 fps | 100% |
| Hodgdon H4831 SC | <<locked>> | 82% | 55,985 psi | 88% | 2805 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 86% | 54,940 psi | 86% | 2900 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,116 psi | 60% | 1857 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 56,956 psi | 89% | 2795 fps | 100% |
| IMR 7828 SSC | <<locked>> | 84% | 57,464 psi | 90% | 2877 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 88% | 55,666 psi | 87% | 2756 fps | 96.7% |
| IMR 8133 Enduron | <<locked>> | 94% | 54,128 psi | 85% | 2835 fps | 100% |
| Lovex D100 | <<locked>> | 92% | 57,522 psi | 90% | 2802 fps | 96.1% |
| Lovex S071 | <<locked>> | 88% | 57,377 psi | 90% | 2762 fps | 100% |
| Norma 217 | <<locked>> | 94% | 55,811 psi | 87% | 2854 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 55,114 psi | 86% | 2841 fps | 100% |
| Ramshot Magnum | <<locked>> | 84% | 53,737 psi | 84% | 2769 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,160 psi | 61% | 1900 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 55,695 psi | 87% | 2881 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 54,955 psi | 86% | 2858 fps | 99.9% |
| Shooters World 50 BMG | <<locked>> | 92% | 57,522 psi | 90% | 2802 fps | 96.1% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 57,595 psi | 90% | 2841 fps | 98.8% |
| Vihtavuori 20N29ᴾ | <<locked>> | 100% | 51,082 psi | 80% | 2756 fps | 96.2% |
| Vihtavuori N165 | <<locked>> | 84% | 55,883 psi | 88% | 2756 fps | 100% |
| Vihtavuori N170 | <<locked>> | 88% | 55,622 psi | 87% | 2792 fps | 98% |
| Vihtavuori N565 | <<locked>> | 86% | 56,826 psi | 89% | 2848 fps | 100% |
| Vihtavuori N568 | <<locked>> | 88% | 55,158 psi | 86% | 2861 fps | 99.7% |
| Vihtavuori N570 | <<locked>> | 90% | 56,811 psi | 89% | 2927 fps | 99.1% |
| Winchester StaBALL HD | <<locked>> | 82% | 55,419 psi | 87% | 2822 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 82% | 55,434 psi | 87% | 2762 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% | 51,576 psi | 81% | 2684 fps | 100% |
| Accurate 8700 | <<locked>> | 92% | 41,640 psi | 65% | 2589 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 80% | 51,082 psi | 80% | 2776 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 80% | 38,464 psi | 60% | 2536 fps | 98.3% |
| ADI AR 2218 | 86.5 gr | 86% | 41,350 psi | 65% | 2667 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 80% | 35,795 psi | 56% | 2510 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 80% | 51,837 psi | 81% | 2772 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 50,589 psi | 79% | 2690 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 44,759 psi | 70% | 2654 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 82% | 39,900 psi | 63% | 2595 fps | 95.2% |
| Alliant Reloder-50 | 89.8 gr | 88% | 43,511 psi | 68% | 2657 fps | 95.9% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 48,196 psi | 76% | 2680 fps | 98% |
| Bofors RP15 | <<locked>> | 80% | 48,298 psi | 76% | 2713 fps | 99.9% |
| Bofors RP30 | <<locked>> | 80% | 41,785 psi | 65% | 2608 fps | 99% |
| Bofors RP5 | <<locked>> | 80% | 51,837 psi | 81% | 2772 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 41,858 psi | 66% | 2605 fps | 99.4% |
| Hodgdon H4831 | <<locked>> | 80% | 53,272 psi | 83% | 2766 fps | 99.8% |
| Hodgdon H4831 SC | <<locked>> | 80% | 52,315 psi | 82% | 2749 fps | 99.7% |
| Hodgdon Retumbo | <<locked>> | 80% | 44,048 psi | 69% | 2723 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,587 psi | 45% | 1667 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 53,388 psi | 84% | 2743 fps | 99.9% |
| IMR 7828 SSC | <<locked>> | 80% | 49,922 psi | 78% | 2759 fps | 99.8% |
| IMR 7977 Enduron | <<locked>> | 84% | 48,936 psi | 77% | 2644 fps | 95% |
| IMR 8133 Enduron | <<locked>> | 80% | 33,402 psi | 52% | 2434 fps | 96.3% |
| Lovex D100 | <<locked>> | 90% | 53,606 psi | 84% | 2743 fps | 95.2% |
| Lovex S071 | <<locked>> | 80% | 44,498 psi | 70% | 2572 fps | 100% |
| Norma 217 | <<locked>> | 80% | 34,055 psi | 53% | 2461 fps | 98.6% |
| Ramshot Grand | <<locked>> | 80% | 51,053 psi | 80% | 2779 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 46,238 psi | 72% | 2654 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,428 psi | 46% | 1706 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 44,019 psi | 69% | 2700 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 40,509 psi | 63% | 2602 fps | 97.6% |
| Shooters World 50 BMG | <<locked>> | 90% | 53,606 psi | 84% | 2743 fps | 95.2% |
| SNPE Vectan SP 13 | <<locked>> | 92% | 43,656 psi | 68% | 2608 fps | 95.7% |
| Vihtavuori 20N29 | <<locked>> | 98% | 47,485 psi | 74% | 2694 fps | 95.2% |
| Vihtavuori N165 | <<locked>> | 80% | 48,921 psi | 77% | 2654 fps | 100% |
| Vihtavuori N170 | <<locked>> | 82% | 45,353 psi | 71% | 2615 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 80% | 46,296 psi | 73% | 2677 fps | 99.3% |
| Vihtavuori N568 | <<locked>> | 80% | 41,350 psi | 65% | 2615 fps | 97.3% |
| Vihtavuori N570 | 80.8 gr | 82% | 42,583 psi | 67% | 2671 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 51,459 psi | 81% | 2769 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 51,619 psi | 81% | 2707 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 42 powders for 7 mm Rem. Ultra Mag. loaded with the .284 | 168gr | Sierra MatchKing. ADI AR 2218 delivers the highest muzzle velocity at 2,946 fps; across all powders the maximum-charge window runs from 1,857 fps to 2,946 fps. Accurate 8700 gives the best case fill at 100 %, and 42 of the 42 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 168.0 gr projectile in 0.284" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Accurate 8700, Hodgdon TrailBoss, ReloadSwiss RS 14 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, Alliant Reloder-50 rank at the top here: for 7 mm Rem. Ultra Mag. with the .284 | 168gr | 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.