Load Specifications
Load data in caliber 7 mm Rem. Ultra Mag. with .285 | 173gr | Prvi Partizan FMJ BT 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% | 56,594 psi | 89% | 2717 fps | 100% |
| Accurate 8700 | <<locked>> | 98% | 54,128 psi | 85% | 2772 fps | 98.8% |
| ADI AR 2213 | <<locked>> | 82% | 56,507 psi | 89% | 2822 fps | 100% |
| ADI AR 2217 | <<locked>> | 90% | 56,695 psi | 89% | 2808 fps | 100% |
| ADI AR 2218 | <<locked>> | 92% | 53,621 psi | 84% | 2874 fps | 99.4% |
| ADI AR 2225 | <<locked>> | 92% | 57,029 psi | 89% | 2831 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 82% | 57,101 psi | 89% | 2812 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 82% | 55,463 psi | 87% | 2720 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 86% | 56,811 psi | 89% | 2795 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 55,898 psi | 88% | 2851 fps | 99.3% |
| Alliant Reloder-50 | <<locked>> | 94% | 56,550 psi | 89% | 2851 fps | 99.1% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 56,246 psi | 88% | 2779 fps | 99.4% |
| Bofors RP15 | <<locked>> | 84% | 56,536 psi | 89% | 2805 fps | 100% |
| Bofors RP30 | <<locked>> | 88% | 56,710 psi | 89% | 2825 fps | 100% |
| Bofors RP5 | <<locked>> | 82% | 57,101 psi | 89% | 2812 fps | 100% |
| Hodgdon H1000 | <<locked>> | 86% | 53,896 psi | 84% | 2769 fps | 100% |
| Hodgdon H4831 SC | <<locked>> | 82% | 57,551 psi | 90% | 2795 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 57,014 psi | 89% | 2890 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,159 psi | 60% | 1834 fps | 100% |
| IMR 7828 SSC | <<locked>> | 82% | 55,100 psi | 86% | 2805 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 88% | 57,072 psi | 89% | 2746 fps | 97.3% |
| IMR 8133 Enduron | <<locked>> | 94% | 55,985 psi | 88% | 2825 fps | 100% |
| Lovex D100 | <<locked>> | 90% | 55,129 psi | 86% | 2736 fps | 95.9% |
| Lovex S071 | <<locked>> | 86% | 55,434 psi | 87% | 2700 fps | 100% |
| Norma 217 | <<locked>> | 92% | 53,896 psi | 84% | 2789 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 56,811 psi | 89% | 2828 fps | 100% |
| Ramshot LRT | <<locked>> | 94% | 57,145 psi | 90% | 2867 fps | 96.1% |
| Ramshot Magnum | <<locked>> | 84% | 55,317 psi | 87% | 2756 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,218 psi | 61% | 1877 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 84% | 53,592 psi | 84% | 2815 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 56,840 psi | 89% | 2848 fps | 100% |
| Shooters World 50 BMG | <<locked>> | 90% | 55,129 psi | 86% | 2736 fps | 95.9% |
| SNPE Vectan SP 13 | <<locked>> | 98% | 55,477 psi | 87% | 2779 fps | 98.7% |
| Vihtavuori 20N29ᴾ | <<locked>> | 100% | 52,837 psi | 83% | 2753 fps | 97% |
| Vihtavuori N165 | <<locked>> | 84% | 57,261 psi | 90% | 2740 fps | 100% |
| Vihtavuori N170 | <<locked>> | 88% | 56,971 psi | 89% | 2779 fps | 98.5% |
| Vihtavuori N565 | <<locked>> | 84% | 54,621 psi | 86% | 2779 fps | 100% |
| Vihtavuori N568 | <<locked>> | 88% | 56,971 psi | 89% | 2854 fps | 99.9% |
| Vihtavuori N570 | <<locked>> | 88% | 54,636 psi | 86% | 2858 fps | 98.9% |
| Winchester StaBALL HD | <<locked>> | 82% | 57,464 psi | 90% | 2808 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 82% | 56,826 psi | 89% | 2746 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% | 52,968 psi | 83% | 2667 fps | 100% |
| Accurate 8700 | <<locked>> | 90% | 40,089 psi | 63% | 2526 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 80% | 52,518 psi | 82% | 2762 fps | 100% |
| ADI AR 2217 | <<locked>> | 80% | 39,697 psi | 62% | 2530 fps | 98.9% |
| ADI AR 2218 | 85 gr | 84% | 39,624 psi | 62% | 2598 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 80% | 37,043 psi | 58% | 2507 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 53,243 psi | 83% | 2756 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 52,025 psi | 82% | 2674 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 46,195 psi | 72% | 2644 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 82% | 41,278 psi | 65% | 2592 fps | 96.1% |
| Alliant Reloder-50 | <<locked>> | 86% | 42,003 psi | 66% | 2595 fps | 95.7% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 49,313 psi | 77% | 2667 fps | 98.5% |
| Bofors RP15 | <<locked>> | 80% | 49,647 psi | 78% | 2700 fps | 100% |
| Bofors RP30 | <<locked>> | 80% | 43,163 psi | 68% | 2602 fps | 99.4% |
| Bofors RP5 | <<locked>> | 80% | 53,243 psi | 83% | 2756 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 43,410 psi | 68% | 2602 fps | 99.7% |
| Hodgdon H4831 SC | <<locked>> | 80% | 53,635 psi | 84% | 2736 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 80% | 45,643 psi | 72% | 2717 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,703 psi | 45% | 1647 fps | 100% |
| IMR 7828 SSC | <<locked>> | 80% | 51,401 psi | 81% | 2749 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 84% | 50,038 psi | 78% | 2635 fps | 95.7% |
| IMR 8133 Enduron | 74.4 gr | 80% | 34,635 psi | 54% | 2431 fps | 97.1% |
| Lovex D100 | <<locked>> | 88% | 51,387 psi | 81% | 2677 fps | 95% |
| Lovex S071 | <<locked>> | 80% | 45,745 psi | 72% | 2559 fps | 100% |
| Norma 217 | <<locked>> | 80% | 35,375 psi | 55% | 2457 fps | 99.1% |
| Ramshot Grand | <<locked>> | 80% | 52,852 psi | 83% | 2772 fps | 100% |
| Ramshot LRT | <<locked>> | 92% | 53,200 psi | 83% | 2805 fps | 95.1% |
| Ramshot Magnum | <<locked>> | 80% | 47,674 psi | 75% | 2641 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,559 psi | 46% | 1686 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 45,803 psi | 72% | 2694 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 42,061 psi | 66% | 2598 fps | 98.3% |
| Shooters World 50 BMG | <<locked>> | 88% | 51,387 psi | 81% | 2677 fps | 95% |
| SNPE Vectan SP 13 | <<locked>> | 90% | 42,177 psi | 66% | 2549 fps | 95.5% |
| Vihtavuori 20N29 | <<locked>> | 96% | 45,847 psi | 72% | 2631 fps | 95% |
| Vihtavuori N165 | <<locked>> | 80% | 50,183 psi | 79% | 2638 fps | 100% |
| Vihtavuori N170 | <<locked>> | 80% | 43,439 psi | 68% | 2549 fps | 95.3% |
| Vihtavuori N565 | <<locked>> | 80% | 47,674 psi | 75% | 2667 fps | 99.6% |
| Vihtavuori N568 | <<locked>> | 80% | 42,699 psi | 67% | 2608 fps | 97.9% |
| Vihtavuori N570 | 79.3 gr | 80% | 40,857 psi | 64% | 2602 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 53,316 psi | 84% | 2756 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 52,910 psi | 83% | 2694 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 .285 | 173gr | Prvi Partizan FMJ BT. Hodgdon Retumbo delivers the highest muzzle velocity at 2,890 fps; across all powders the maximum-charge window runs from 1,834 fps to 2,890 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 173.0 gr projectile in 0.285" calls for a 1:12.0 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 .285 | 173gr | Prvi Partizan FMJ 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.