Load Specifications
Load data in caliber 7 mm Rem. Ultra Mag. with .284 | 174gr | Prvi Partizan SP 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% | 56,507 psi | 89% | 2707 fps | 100% |
| Accurate 8700 | <<locked>> | 98% | 53,940 psi | 85% | 2766 fps | 98.8% |
| ADI AR 2213 | <<locked>> | 82% | 56,347 psi | 88% | 2812 fps | 100% |
| ADI AR 2217 | <<locked>> | 90% | 56,608 psi | 89% | 2802 fps | 100% |
| ADI AR 2218 | <<locked>> | 92% | 53,577 psi | 84% | 2871 fps | 99.4% |
| ADI AR 2225 | <<locked>> | 92% | 56,971 psi | 89% | 2825 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 82% | 57,000 psi | 89% | 2805 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 82% | 55,506 psi | 87% | 2713 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 86% | 56,724 psi | 89% | 2789 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 55,680 psi | 87% | 2844 fps | 99.3% |
| Alliant Reloder-50 | <<locked>> | 94% | 56,333 psi | 88% | 2844 fps | 99.1% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 56,347 psi | 88% | 2776 fps | 99.5% |
| Bofors RP15 | <<locked>> | 84% | 56,608 psi | 89% | 2799 fps | 100% |
| Bofors RP30 | <<locked>> | 88% | 56,608 psi | 89% | 2815 fps | 100% |
| Bofors RP5 | <<locked>> | 82% | 57,000 psi | 89% | 2805 fps | 100% |
| Hodgdon H1000 | <<locked>> | 86% | 53,795 psi | 84% | 2762 fps | 100% |
| Hodgdon H4831 SC | <<locked>> | 82% | 57,435 psi | 90% | 2785 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 56,898 psi | 89% | 2884 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,247 psi | 60% | 1831 fps | 100% |
| IMR 7828 SSC | <<locked>> | 82% | 55,172 psi | 86% | 2799 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 88% | 56,985 psi | 89% | 2736 fps | 97.3% |
| IMR 8133 Enduron | <<locked>> | 94% | 55,927 psi | 88% | 2815 fps | 100% |
| Lovex D100 | <<locked>> | 90% | 55,085 psi | 86% | 2730 fps | 96% |
| Lovex S071 | <<locked>> | 86% | 55,332 psi | 87% | 2694 fps | 100% |
| Norma 217 | <<locked>> | 94% | 57,508 psi | 90% | 2831 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 56,666 psi | 89% | 2822 fps | 100% |
| Ramshot LRT | <<locked>> | 94% | 57,130 psi | 90% | 2864 fps | 96.1% |
| Ramshot Magnum | <<locked>> | 84% | 55,230 psi | 87% | 2746 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,305 psi | 62% | 1873 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 57,711 psi | 90% | 2864 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 56,782 psi | 89% | 2844 fps | 100% |
| Shooters World 50 BMG | <<locked>> | 90% | 55,085 psi | 86% | 2730 fps | 96% |
| SNPE Vectan SP 13 | <<locked>> | 98% | 55,492 psi | 87% | 2772 fps | 98.8% |
| Vihtavuori 20N29ᴾ | <<locked>> | 100% | 52,852 psi | 83% | 2746 fps | 97% |
| Vihtavuori N165 | <<locked>> | 84% | 57,159 psi | 90% | 2733 fps | 100% |
| Vihtavuori N170 | <<locked>> | 88% | 56,927 psi | 89% | 2772 fps | 98.5% |
| Vihtavuori N565 | <<locked>> | 84% | 54,563 psi | 86% | 2772 fps | 100% |
| Vihtavuori N568 | <<locked>> | 88% | 56,913 psi | 89% | 2844 fps | 99.9% |
| Vihtavuori N570 | <<locked>> | 88% | 54,578 psi | 86% | 2851 fps | 98.9% |
| Winchester StaBALL HD | <<locked>> | 82% | 57,377 psi | 90% | 2802 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 82% | 56,710 psi | 89% | 2740 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% | 53,011 psi | 83% | 2661 fps | 100% |
| Accurate 8700 | <<locked>> | 90% | 40,016 psi | 63% | 2520 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 80% | 52,562 psi | 82% | 2756 fps | 100% |
| ADI AR 2217 | <<locked>> | 80% | 39,566 psi | 62% | 2520 fps | 98.9% |
| ADI AR 2218 | 84.6 gr | 84% | 39,566 psi | 62% | 2592 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 80% | 37,086 psi | 58% | 2500 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 53,287 psi | 84% | 2753 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 51,866 psi | 81% | 2667 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 46,035 psi | 72% | 2635 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 80% | 38,276 psi | 60% | 2523 fps | 95% |
| Alliant Reloder-50 | <<locked>> | 86% | 41,959 psi | 66% | 2589 fps | 95.8% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 49,414 psi | 77% | 2667 fps | 98.5% |
| Bofors RP15 | <<locked>> | 80% | 49,530 psi | 78% | 2694 fps | 100% |
| Bofors RP30 | <<locked>> | 80% | 43,192 psi | 68% | 2598 fps | 99.4% |
| Bofors RP5 | <<locked>> | 80% | 53,287 psi | 84% | 2753 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 43,294 psi | 68% | 2592 fps | 99.7% |
| Hodgdon H4831 SC | <<locked>> | 80% | 53,708 psi | 84% | 2730 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 80% | 45,687 psi | 72% | 2710 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,732 psi | 45% | 1640 fps | 100% |
| IMR 7828 SSC | <<locked>> | 80% | 51,430 psi | 81% | 2743 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 84% | 50,140 psi | 79% | 2628 fps | 95.7% |
| IMR 8133 Enduron | 74 gr | 80% | 34,519 psi | 54% | 2425 fps | 97.1% |
| Lovex D100 | <<locked>> | 88% | 51,372 psi | 81% | 2671 fps | 95% |
| Lovex S071 | <<locked>> | 80% | 45,614 psi | 71% | 2549 fps | 100% |
| Norma 217 | <<locked>> | 80% | 35,259 psi | 55% | 2451 fps | 99.1% |
| Ramshot Grand | <<locked>> | 80% | 52,721 psi | 83% | 2762 fps | 100% |
| Ramshot LRT | <<locked>> | 92% | 53,185 psi | 83% | 2799 fps | 95.1% |
| Ramshot Magnum | <<locked>> | 80% | 47,587 psi | 75% | 2638 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,588 psi | 46% | 1680 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 45,716 psi | 72% | 2687 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 41,974 psi | 66% | 2592 fps | 98.3% |
| Shooters World 50 BMG | <<locked>> | 88% | 51,372 psi | 81% | 2671 fps | 95% |
| SNPE Vectan SP 13 | <<locked>> | 90% | 42,134 psi | 66% | 2543 fps | 95.6% |
| Vihtavuori 20N29 | <<locked>> | 96% | 45,658 psi | 72% | 2625 fps | 95% |
| Vihtavuori N165 | <<locked>> | 80% | 50,227 psi | 79% | 2635 fps | 100% |
| Vihtavuori N170 | <<locked>> | 80% | 43,337 psi | 68% | 2543 fps | 95.3% |
| Vihtavuori N565 | <<locked>> | 80% | 47,558 psi | 75% | 2661 fps | 99.6% |
| Vihtavuori N568 | <<locked>> | 80% | 42,757 psi | 67% | 2605 fps | 98% |
| Vihtavuori N570 | 78.9 gr | 80% | 40,770 psi | 64% | 2595 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 53,156 psi | 83% | 2749 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 52,968 psi | 83% | 2690 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 | 174gr | Prvi Partizan SP. Hodgdon Retumbo delivers the highest muzzle velocity at 2,884 fps; across all powders the maximum-charge window runs from 1,831 fps to 2,884 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 174.0 gr projectile in 0.284" calls for a 1:11.5 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 .284 | 174gr | Prvi Partizan SP 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.