Load Specifications
Load data in caliber 7 mm Rem. Ultra Mag. with .284 | 174gr | Prvi Partizan PSP BT bullet and 39 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-33.
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% | 56,086 psi | 88% | 2703 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 57,464 psi | 90% | 2815 fps | 99.3% |
| ADI AR 2213 | <<locked>> | 82% | 55,767 psi | 87% | 2805 fps | 100% |
| ADI AR 2217 | <<locked>> | 90% | 56,014 psi | 88% | 2795 fps | 100% |
| ADI AR 2218 | <<locked>> | 94% | 57,101 psi | 89% | 2923 fps | 99.7% |
| ADI AR 2225 | <<locked>> | 92% | 56,376 psi | 88% | 2818 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 82% | 56,376 psi | 88% | 2799 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 82% | 54,882 psi | 86% | 2707 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 86% | 56,101 psi | 88% | 2782 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 55,158 psi | 86% | 2838 fps | 99.3% |
| Alliant Reloder-50 | <<locked>> | 94% | 55,622 psi | 87% | 2835 fps | 99% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 55,898 psi | 88% | 2769 fps | 99.4% |
| Bofors RP15 | <<locked>> | 84% | 56,043 psi | 88% | 2792 fps | 100% |
| Bofors RP30 | <<locked>> | 88% | 56,014 psi | 88% | 2808 fps | 100% |
| Bofors RP5 | <<locked>> | 82% | 56,376 psi | 88% | 2799 fps | 100% |
| Hodgdon H1000 | <<locked>> | 88% | 57,174 psi | 90% | 2808 fps | 100% |
| Hodgdon H4831 SC | <<locked>> | 82% | 56,869 psi | 89% | 2776 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 56,202 psi | 88% | 2874 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,159 psi | 60% | 1827 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 57,725 psi | 90% | 2766 fps | 100% |
| IMR 7828 SSC | <<locked>> | 82% | 54,563 psi | 86% | 2792 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 88% | 56,536 psi | 89% | 2730 fps | 97.1% |
| IMR 8133 Enduron | <<locked>> | 94% | 55,143 psi | 86% | 2805 fps | 100% |
| Lovex S071 | <<locked>> | 86% | 54,926 psi | 86% | 2690 fps | 100% |
| Norma 217 | <<locked>> | 94% | 56,927 psi | 89% | 2828 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 56,246 psi | 88% | 2815 fps | 100% |
| Ramshot Magnum | <<locked>> | 84% | 54,636 psi | 86% | 2743 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,233 psi | 61% | 1870 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 57,058 psi | 89% | 2854 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 56,043 psi | 88% | 2835 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 98% | 54,853 psi | 86% | 2762 fps | 98.6% |
| Vihtavuori 20N29ᴾ | <<locked>> | 100% | 52,243 psi | 82% | 2736 fps | 96.8% |
| Vihtavuori N165 | <<locked>> | 84% | 56,782 psi | 89% | 2730 fps | 100% |
| Vihtavuori N170 | <<locked>> | 88% | 56,420 psi | 88% | 2766 fps | 98.4% |
| Vihtavuori N565 | <<locked>> | 86% | 57,696 psi | 90% | 2818 fps | 100% |
| Vihtavuori N568 | <<locked>> | 88% | 56,376 psi | 88% | 2838 fps | 99.9% |
| Vihtavuori N570 | <<locked>> | 88% | 54,027 psi | 85% | 2841 fps | 98.8% |
| Winchester StaBALL HD | <<locked>> | 82% | 56,637 psi | 89% | 2792 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 82% | 56,333 psi | 88% | 2736 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% | 52,402 psi | 82% | 2654 fps | 100% |
| Accurate 8700 | <<locked>> | 90% | 39,581 psi | 62% | 2513 fps | 95% |
| ADI AR 2213 | <<locked>> | 80% | 51,967 psi | 81% | 2746 fps | 100% |
| ADI AR 2217 | <<locked>> | 80% | 39,204 psi | 61% | 2513 fps | 98.8% |
| ADI AR 2218 | 83.9 gr | 84% | 39,131 psi | 61% | 2582 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 80% | 36,579 psi | 57% | 2493 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 52,692 psi | 83% | 2743 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 51,445 psi | 81% | 2661 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 45,629 psi | 72% | 2628 fps | 100% |
| Alliant Reloder-33 | 83.4 gr | 82% | 40,727 psi | 64% | 2575 fps | 95.9% |
| Alliant Reloder-50 | <<locked>> | 86% | 41,321 psi | 65% | 2579 fps | 95.5% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 48,936 psi | 77% | 2657 fps | 98.4% |
| Bofors RP15 | <<locked>> | 80% | 49,124 psi | 77% | 2687 fps | 100% |
| Bofors RP30 | <<locked>> | 80% | 42,627 psi | 67% | 2585 fps | 99.3% |
| Bofors RP5 | <<locked>> | 80% | 52,692 psi | 83% | 2743 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 42,888 psi | 67% | 2585 fps | 99.7% |
| Hodgdon H4831 SC | <<locked>> | 80% | 53,142 psi | 83% | 2723 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 80% | 45,020 psi | 71% | 2700 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,732 psi | 45% | 1637 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 54,128 psi | 85% | 2717 fps | 99.9% |
| IMR 7828 SSC | <<locked>> | 80% | 51,010 psi | 80% | 2736 fps | 99.9% |
| IMR 7977 Enduron | <<locked>> | 84% | 49,661 psi | 78% | 2621 fps | 95.5% |
| IMR 8133 Enduron | <<locked>> | 80% | 34,127 psi | 53% | 2418 fps | 97% |
| Lovex S071 | <<locked>> | 80% | 45,368 psi | 71% | 2546 fps | 100% |
| Norma 217 | <<locked>> | 80% | 34,853 psi | 55% | 2444 fps | 99% |
| Ramshot Grand | <<locked>> | 80% | 52,098 psi | 82% | 2756 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 47,195 psi | 74% | 2631 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,588 psi | 46% | 1677 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 45,121 psi | 71% | 2677 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 41,466 psi | 65% | 2585 fps | 98.1% |
| SNPE Vectan SP 13 | <<locked>> | 90% | 41,524 psi | 65% | 2533 fps | 95.3% |
| Vihtavuori 20N29 | <<locked>> | 98% | 48,544 psi | 76% | 2677 fps | 95.8% |
| Vihtavuori N165 | <<locked>> | 80% | 49,690 psi | 78% | 2628 fps | 100% |
| Vihtavuori N170 | <<locked>> | 80% | 43,018 psi | 67% | 2536 fps | 95.2% |
| Vihtavuori N565 | <<locked>> | 80% | 47,152 psi | 74% | 2654 fps | 99.5% |
| Vihtavuori N568 | <<locked>> | 80% | 42,235 psi | 66% | 2595 fps | 97.8% |
| Vihtavuori N570 | 78.3 gr | 80% | 40,379 psi | 63% | 2589 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 52,663 psi | 83% | 2743 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 52,431 psi | 82% | 2680 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 39 powders for 7 mm Rem. Ultra Mag. loaded with the .284 | 174gr | Prvi Partizan PSP BT. ADI AR 2218 delivers the highest muzzle velocity at 2,923 fps; across all powders the maximum-charge window runs from 1,827 fps to 2,923 fps. Accurate 8700 gives the best case fill at 100 %, and 39 of the 39 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 174.0 gr projectile in 0.284" calls for a 1:11.0 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-33 rank at the top here: for 7 mm Rem. Ultra Mag. with the .284 | 174gr | Prvi Partizan PSP BT 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.