Load Specifications
Load data in caliber 7 mm Rem. Ultra Mag. with .284 | 175gr | 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 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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 82% | 55,709 psi | 87% | 2694 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 56,710 psi | 89% | 2802 fps | 99.2% |
| ADI AR 2213 | <<locked>> | 82% | 55,361 psi | 87% | 2792 fps | 100% |
| ADI AR 2217 | <<locked>> | 90% | 55,492 psi | 87% | 2785 fps | 100% |
| ADI AR 2218 | <<locked>> | 94% | 56,463 psi | 88% | 2913 fps | 99.7% |
| ADI AR 2225 | <<locked>> | 92% | 55,666 psi | 87% | 2805 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 82% | 56,014 psi | 88% | 2789 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 82% | 54,476 psi | 85% | 2697 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 86% | 55,738 psi | 87% | 2772 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 54,505 psi | 85% | 2822 fps | 99.2% |
| Alliant Reloder-50 | <<locked>> | 94% | 55,027 psi | 86% | 2822 fps | 99% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 55,477 psi | 87% | 2759 fps | 99.4% |
| Bofors RP15 | <<locked>> | 84% | 55,666 psi | 87% | 2782 fps | 100% |
| Bofors RP30 | <<locked>> | 88% | 55,724 psi | 87% | 2802 fps | 100% |
| Bofors RP5 | <<locked>> | 82% | 56,014 psi | 88% | 2789 fps | 100% |
| Hodgdon H1000 | <<locked>> | 88% | 56,840 psi | 89% | 2802 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 57,551 psi | 90% | 2782 fps | 100% |
| Hodgdon H4831 SC | <<locked>> | 82% | 56,521 psi | 89% | 2769 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 55,579 psi | 87% | 2861 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,203 psi | 60% | 1821 fps | 100% |
| Hodgdon US 869 | <<locked>> | 98% | 57,392 psi | 90% | 2805 fps | 96% |
| IMR 4955 Enduron | <<locked>> | 82% | 57,392 psi | 90% | 2756 fps | 100% |
| IMR 7828 SSC | <<locked>> | 82% | 54,172 psi | 85% | 2779 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 88% | 56,289 psi | 88% | 2720 fps | 97.1% |
| IMR 8133 Enduron | <<locked>> | 94% | 54,650 psi | 86% | 2795 fps | 100% |
| Lovex S071 | <<locked>> | 86% | 54,534 psi | 85% | 2677 fps | 100% |
| Norma 217 | <<locked>> | 94% | 56,362 psi | 88% | 2815 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 55,622 psi | 87% | 2802 fps | 100% |
| Ramshot Magnum | <<locked>> | 84% | 54,317 psi | 85% | 2733 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,262 psi | 62% | 1864 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 56,507 psi | 89% | 2844 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 55,593 psi | 87% | 2822 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 98% | 54,302 psi | 85% | 2753 fps | 98.6% |
| Vihtavuori 20N29ᴾ | <<locked>> | 100% | 51,547 psi | 81% | 2723 fps | 96.7% |
| Vihtavuori N165 | <<locked>> | 84% | 56,463 psi | 88% | 2720 fps | 100% |
| Vihtavuori N170 | <<locked>> | 88% | 55,999 psi | 88% | 2756 fps | 98.3% |
| Vihtavuori N565 | <<locked>> | 86% | 57,377 psi | 90% | 2808 fps | 100% |
| Vihtavuori N568 | <<locked>> | 88% | 55,854 psi | 88% | 2825 fps | 99.9% |
| Vihtavuori N570 | <<locked>> | 90% | 57,638 psi | 90% | 2894 fps | 99.3% |
| Winchester StaBALL HD | <<locked>> | 82% | 56,202 psi | 88% | 2782 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 82% | 55,796 psi | 87% | 2723 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% | 52,040 psi | 82% | 2644 fps | 100% |
| Accurate 8700 | <<locked>> | 92% | 42,192 psi | 66% | 2562 fps | 96% |
| ADI AR 2213 | <<locked>> | 80% | 51,779 psi | 81% | 2740 fps | 100% |
| ADI AR 2217 | <<locked>> | 80% | 38,856 psi | 61% | 2503 fps | 98.7% |
| ADI AR 2218 | 83 gr | 84% | 38,740 psi | 61% | 2572 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 80% | 36,216 psi | 57% | 2480 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 52,504 psi | 82% | 2736 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 51,010 psi | 80% | 2651 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 45,208 psi | 71% | 2618 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 82% | 40,422 psi | 63% | 2569 fps | 95.8% |
| Alliant Reloder-50 | 86.3 gr | 86% | 40,901 psi | 64% | 2566 fps | 95.4% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 48,675 psi | 76% | 2648 fps | 98.4% |
| Bofors RP15 | <<locked>> | 80% | 48,733 psi | 76% | 2674 fps | 100% |
| Bofors RP30 | <<locked>> | 80% | 42,250 psi | 66% | 2575 fps | 99.3% |
| Bofors RP5 | <<locked>> | 80% | 52,504 psi | 82% | 2736 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 42,511 psi | 67% | 2575 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 80% | 53,737 psi | 84% | 2726 fps | 99.9% |
| Hodgdon H4831 SC | <<locked>> | 80% | 52,968 psi | 83% | 2713 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 80% | 44,614 psi | 70% | 2690 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,660 psi | 45% | 1631 fps | 100% |
| Hodgdon US 869 | <<locked>> | 96% | 53,388 psi | 84% | 2743 fps | 95% |
| IMR 4955 Enduron | <<locked>> | 80% | 53,766 psi | 84% | 2703 fps | 99.9% |
| IMR 7828 SSC | <<locked>> | 80% | 50,618 psi | 79% | 2726 fps | 99.9% |
| IMR 7977 Enduron | <<locked>> | 84% | 49,385 psi | 77% | 2612 fps | 95.5% |
| IMR 8133 Enduron | <<locked>> | 80% | 33,765 psi | 53% | 2405 fps | 96.9% |
| Lovex S071 | <<locked>> | 80% | 44,976 psi | 70% | 2536 fps | 100% |
| Norma 217 | <<locked>> | 80% | 34,461 psi | 54% | 2434 fps | 98.9% |
| Ramshot Grand | <<locked>> | 80% | 51,692 psi | 81% | 2743 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 46,833 psi | 73% | 2621 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,530 psi | 46% | 1670 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 44,730 psi | 70% | 2667 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 40,973 psi | 64% | 2572 fps | 98% |
| SNPE Vectan SP 13 | <<locked>> | 90% | 41,147 psi | 64% | 2523 fps | 95.2% |
| Vihtavuori 20N29 | <<locked>> | 98% | 48,051 psi | 75% | 2664 fps | 95.7% |
| Vihtavuori N165 | <<locked>> | 80% | 49,327 psi | 77% | 2615 fps | 100% |
| Vihtavuori N170 | <<locked>> | 80% | 42,757 psi | 67% | 2526 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 80% | 46,804 psi | 73% | 2644 fps | 99.5% |
| Vihtavuori N568 | <<locked>> | 80% | 41,887 psi | 66% | 2585 fps | 97.8% |
| Vihtavuori N570 | 77.5 gr | 80% | 40,045 psi | 63% | 2579 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 52,199 psi | 82% | 2733 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 52,083 psi | 82% | 2671 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 | 175gr | Sierra MatchKing. ADI AR 2218 delivers the highest muzzle velocity at 2,913 fps; across all powders the maximum-charge window runs from 1,821 fps to 2,913 fps. Accurate 8700 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 175.0 gr projectile in 0.284" calls for a 1:10.0 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 | 175gr | 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.