Load Specifications
Load data in caliber 7 mm Rem. Ultra Mag. with .284 | 170gr | Sierra RN Prohunter bullet and 38 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% | 56,318 psi | 88% | 2733 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 57,725 psi | 90% | 2844 fps | 99.2% |
| ADI AR 2213 | <<locked>> | 82% | 55,941 psi | 88% | 2831 fps | 100% |
| ADI AR 2217 | <<locked>> | 90% | 56,231 psi | 88% | 2825 fps | 100% |
| ADI AR 2218 | <<locked>> | 94% | 57,450 psi | 90% | 2953 fps | 99.7% |
| ADI AR 2225 | <<locked>> | 92% | 56,521 psi | 89% | 2844 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 82% | 56,594 psi | 89% | 2828 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 82% | 55,158 psi | 86% | 2736 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 86% | 56,217 psi | 88% | 2808 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 55,376 psi | 87% | 2864 fps | 99.2% |
| Alliant Reloder-50 | <<locked>> | 94% | 55,956 psi | 88% | 2861 fps | 99% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 55,927 psi | 88% | 2792 fps | 99.3% |
| Bofors RP15 | <<locked>> | 84% | 56,217 psi | 88% | 2822 fps | 100% |
| Bofors RP30 | <<locked>> | 88% | 56,289 psi | 88% | 2838 fps | 100% |
| Bofors RP5 | <<locked>> | 82% | 56,594 psi | 89% | 2828 fps | 100% |
| Hodgdon H1000 | <<locked>> | 88% | 57,421 psi | 90% | 2838 fps | 100% |
| Hodgdon H4831 SC | <<locked>> | 82% | 57,058 psi | 89% | 2805 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 56,347 psi | 88% | 2904 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,218 psi | 60% | 1850 fps | 100% |
| IMR 7828 SSC | <<locked>> | 82% | 54,752 psi | 86% | 2822 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 88% | 56,782 psi | 89% | 2759 fps | 97.1% |
| IMR 8133 Enduron | <<locked>> | 94% | 55,521 psi | 87% | 2835 fps | 100% |
| Lovex S071 | <<locked>> | 86% | 54,940 psi | 86% | 2713 fps | 100% |
| Norma 217 | <<locked>> | 94% | 57,276 psi | 90% | 2854 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 56,376 psi | 88% | 2841 fps | 100% |
| Ramshot Magnum | <<locked>> | 84% | 54,897 psi | 86% | 2769 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,276 psi | 62% | 1893 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 57,232 psi | 90% | 2884 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 56,304 psi | 88% | 2861 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 98% | 55,201 psi | 87% | 2792 fps | 98.6% |
| Vihtavuori 20N29ᴾ | <<locked>> | 100% | 52,489 psi | 82% | 2759 fps | 96.7% |
| Vihtavuori N165 | <<locked>> | 84% | 56,927 psi | 89% | 2756 fps | 100% |
| Vihtavuori N170 | <<locked>> | 88% | 56,753 psi | 89% | 2795 fps | 98.4% |
| Vihtavuori N565 | <<locked>> | 84% | 54,273 psi | 85% | 2795 fps | 100% |
| Vihtavuori N568 | <<locked>> | 88% | 56,521 psi | 89% | 2864 fps | 99.9% |
| Vihtavuori N570 | <<locked>> | 88% | 54,389 psi | 85% | 2871 fps | 98.8% |
| Winchester StaBALL HD | <<locked>> | 82% | 56,840 psi | 89% | 2822 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 82% | 56,492 psi | 89% | 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% | 52,663 psi | 83% | 2680 fps | 100% |
| Accurate 8700 | <<locked>> | 92% | 42,772 psi | 67% | 2595 fps | 96% |
| ADI AR 2213 | <<locked>> | 80% | 52,228 psi | 82% | 2776 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 80% | 39,276 psi | 62% | 2536 fps | 98.6% |
| ADI AR 2218 | 85.4 gr | 84% | 39,305 psi | 62% | 2605 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 80% | 36,782 psi | 58% | 2516 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 52,953 psi | 83% | 2772 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 51,561 psi | 81% | 2687 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 45,701 psi | 72% | 2654 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 82% | 40,915 psi | 64% | 2602 fps | 95.8% |
| Alliant Reloder-50 | <<locked>> | 86% | 41,597 psi | 65% | 2605 fps | 95.4% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 49,052 psi | 77% | 2684 fps | 98.3% |
| Bofors RP15 | <<locked>> | 80% | 49,226 psi | 77% | 2713 fps | 100% |
| Bofors RP30 | <<locked>> | 80% | 42,859 psi | 67% | 2612 fps | 99.3% |
| Bofors RP5 | <<locked>> | 80% | 52,953 psi | 83% | 2772 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 42,960 psi | 67% | 2608 fps | 99.6% |
| Hodgdon H4831 SC | <<locked>> | 80% | 53,359 psi | 84% | 2753 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 80% | 45,310 psi | 71% | 2730 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,660 psi | 45% | 1660 fps | 100% |
| IMR 7828 SSC | <<locked>> | 80% | 51,068 psi | 80% | 2762 fps | 99.9% |
| IMR 7977 Enduron | <<locked>> | 84% | 49,821 psi | 78% | 2648 fps | 95.4% |
| IMR 8133 Enduron | 74.7 gr | 80% | 34,214 psi | 54% | 2438 fps | 96.8% |
| Lovex S071 | <<locked>> | 80% | 45,382 psi | 71% | 2572 fps | 100% |
| Norma 217 | <<locked>> | 80% | 34,954 psi | 55% | 2464 fps | 98.9% |
| Ramshot Grand | <<locked>> | 80% | 52,301 psi | 82% | 2782 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 47,340 psi | 74% | 2657 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,501 psi | 46% | 1699 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 45,426 psi | 71% | 2703 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 41,539 psi | 65% | 2605 fps | 98% |
| SNPE Vectan SP 13 | <<locked>> | 90% | 41,814 psi | 66% | 2559 fps | 95.2% |
| Vihtavuori 20N29 | <<locked>> | 98% | 48,805 psi | 76% | 2700 fps | 95.7% |
| Vihtavuori N165 | <<locked>> | 80% | 49,922 psi | 78% | 2654 fps | 100% |
| Vihtavuori N170 | <<locked>> | 80% | 43,163 psi | 68% | 2559 fps | 95% |
| Vihtavuori N565 | <<locked>> | 80% | 47,166 psi | 74% | 2677 fps | 99.5% |
| Vihtavuori N568 | <<locked>> | 80% | 42,395 psi | 66% | 2618 fps | 97.7% |
| Vihtavuori N570 | 79.7 gr | 80% | 40,538 psi | 64% | 2608 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 80% | 52,895 psi | 83% | 2769 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 52,649 psi | 83% | 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 38 powders for 7 mm Rem. Ultra Mag. loaded with the .284 | 170gr | Sierra RN Prohunter. ADI AR 2218 delivers the highest muzzle velocity at 2,953 fps; across all powders the maximum-charge window runs from 1,850 fps to 2,953 fps. Accurate 8700 gives the best case fill at 100 %, and 38 of the 38 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 170.0 gr projectile in 0.284" calls for a 1:12.5 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, IMR 8133 Enduron rank at the top here: for 7 mm Rem. Ultra Mag. with the .284 | 170gr | Sierra RN Prohunter 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.