Load Specifications
Load data in caliber 7 mm Rem. Ultra Mag. with .284 | 171gr | Barnes Match Burner BT bullet and 42 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.
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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 82% | 54,955 psi | 86% | 2710 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 55,637 psi | 87% | 2812 fps | 98.9% |
| ADI AR 2213 | <<locked>> | 82% | 54,578 psi | 86% | 2808 fps | 100% |
| ADI AR 2217 | <<locked>> | 90% | 54,563 psi | 86% | 2799 fps | 100% |
| ADI AR 2218 | <<locked>> | 94% | 55,405 psi | 87% | 2920 fps | 99.5% |
| ADI AR 2225 | <<locked>> | 92% | 54,636 psi | 86% | 2818 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 82% | 55,230 psi | 87% | 2802 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 57,305 psi | 90% | 2759 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 86% | 54,839 psi | 86% | 2785 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 57,682 psi | 90% | 2894 fps | 99.4% |
| Alliant Reloder-50 | <<locked>> | 94% | 53,969 psi | 85% | 2828 fps | 98.6% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 54,766 psi | 86% | 2769 fps | 99.2% |
| Bofors RP15 | <<locked>> | 84% | 54,897 psi | 86% | 2795 fps | 100% |
| Bofors RP30 | <<locked>> | 88% | 54,810 psi | 86% | 2812 fps | 100% |
| Bofors RP5 | <<locked>> | 82% | 55,230 psi | 87% | 2802 fps | 100% |
| Hodgdon H1000 | <<locked>> | 88% | 55,927 psi | 88% | 2815 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 56,811 psi | 89% | 2799 fps | 100% |
| Hodgdon H4831 SC | <<locked>> | 82% | 55,796 psi | 87% | 2782 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 86% | 54,534 psi | 85% | 2874 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,101 psi | 60% | 1837 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 56,753 psi | 89% | 2772 fps | 100% |
| IMR 7828 SSC | <<locked>> | 84% | 57,276 psi | 90% | 2851 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 88% | 55,593 psi | 87% | 2733 fps | 96.7% |
| IMR 8133 Enduron | <<locked>> | 96% | 57,421 psi | 90% | 2861 fps | 100% |
| Lovex D100 | <<locked>> | 92% | 57,276 psi | 90% | 2779 fps | 96.2% |
| Lovex S071 | <<locked>> | 88% | 57,203 psi | 90% | 2740 fps | 100% |
| Norma 217 | <<locked>> | 94% | 55,347 psi | 87% | 2828 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 54,723 psi | 86% | 2815 fps | 100% |
| Ramshot Magnum | <<locked>> | 86% | 57,435 psi | 90% | 2799 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,160 psi | 61% | 1880 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 55,463 psi | 87% | 2858 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 54,549 psi | 85% | 2831 fps | 99.9% |
| Shooters World 50 BMG | <<locked>> | 92% | 57,276 psi | 90% | 2779 fps | 96.2% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 57,217 psi | 90% | 2818 fps | 98.8% |
| Vihtavuori 20N29ᴾ | <<locked>> | 100% | 50,575 psi | 79% | 2726 fps | 96.2% |
| Vihtavuori N165 | <<locked>> | 84% | 55,535 psi | 87% | 2730 fps | 100% |
| Vihtavuori N170 | <<locked>> | 88% | 55,230 psi | 87% | 2766 fps | 98% |
| Vihtavuori N565 | <<locked>> | 86% | 56,536 psi | 89% | 2822 fps | 100% |
| Vihtavuori N568 | <<locked>> | 88% | 54,926 psi | 86% | 2838 fps | 99.7% |
| Vihtavuori N570 | <<locked>> | 90% | 56,420 psi | 88% | 2900 fps | 99.1% |
| Winchester StaBALL HD | <<locked>> | 82% | 55,216 psi | 87% | 2799 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 82% | 55,071 psi | 86% | 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% | 51,314 psi | 80% | 2657 fps | 100% |
| Accurate 8700 | <<locked>> | 92% | 41,336 psi | 65% | 2566 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 80% | 50,836 psi | 80% | 2749 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 80% | 38,203 psi | 60% | 2513 fps | 98.4% |
| ADI AR 2218 | 85.1 gr | 86% | 41,017 psi | 64% | 2644 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 80% | 35,563 psi | 56% | 2490 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 80% | 51,576 psi | 81% | 2746 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 50,285 psi | 79% | 2667 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 44,483 psi | 70% | 2631 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 82% | 39,508 psi | 62% | 2572 fps | 95.2% |
| Alliant Reloder-50 | 88.4 gr | 88% | 43,192 psi | 68% | 2638 fps | 96% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 48,051 psi | 75% | 2661 fps | 98% |
| Bofors RP15 | <<locked>> | 80% | 48,037 psi | 75% | 2690 fps | 99.9% |
| Bofors RP30 | <<locked>> | 80% | 41,553 psi | 65% | 2585 fps | 99% |
| Bofors RP5 | <<locked>> | 80% | 51,576 psi | 81% | 2746 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 41,655 psi | 65% | 2582 fps | 99.4% |
| Hodgdon H4831 | <<locked>> | 80% | 53,040 psi | 83% | 2740 fps | 99.8% |
| Hodgdon H4831 SC | <<locked>> | 80% | 52,083 psi | 82% | 2726 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 80% | 43,758 psi | 69% | 2700 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,587 psi | 45% | 1647 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 53,156 psi | 83% | 2720 fps | 99.9% |
| IMR 7828 SSC | <<locked>> | 80% | 49,661 psi | 78% | 2736 fps | 99.8% |
| IMR 7977 Enduron | <<locked>> | 84% | 48,776 psi | 76% | 2621 fps | 95% |
| IMR 8133 Enduron | <<locked>> | 80% | 33,127 psi | 52% | 2411 fps | 96.3% |
| Lovex D100 | <<locked>> | 90% | 53,330 psi | 84% | 2720 fps | 95.2% |
| Lovex S071 | <<locked>> | 80% | 44,353 psi | 70% | 2549 fps | 100% |
| Norma 217 | <<locked>> | 80% | 33,794 psi | 53% | 2438 fps | 98.6% |
| Ramshot Grand | <<locked>> | 80% | 50,836 psi | 80% | 2756 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 45,861 psi | 72% | 2628 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,443 psi | 46% | 1686 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 43,859 psi | 69% | 2680 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 40,205 psi | 63% | 2579 fps | 97.6% |
| Shooters World 50 BMG | <<locked>> | 90% | 53,330 psi | 84% | 2720 fps | 95.2% |
| SNPE Vectan SP 13 | <<locked>> | 92% | 43,352 psi | 68% | 2585 fps | 95.7% |
| Vihtavuori 20N29 | <<locked>> | 98% | 47,079 psi | 74% | 2667 fps | 95.1% |
| Vihtavuori N165 | <<locked>> | 80% | 48,660 psi | 76% | 2628 fps | 100% |
| Vihtavuori N170 | <<locked>> | 82% | 45,049 psi | 71% | 2592 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 80% | 45,934 psi | 72% | 2651 fps | 99.3% |
| Vihtavuori N568 | <<locked>> | 80% | 41,147 psi | 64% | 2595 fps | 97.3% |
| Vihtavuori N570 | 79.5 gr | 82% | 42,264 psi | 66% | 2648 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 51,053 psi | 80% | 2743 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 51,387 psi | 81% | 2684 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 46 powders for 7 mm Rem. Ultra Mag. loaded with the .284 | 171gr | Barnes Match Burner BT. ADI AR 2218 delivers the highest muzzle velocity at 2,920 fps; across all powders the maximum-charge window runs from 1,837 fps to 2,920 fps. Accurate 8700 gives the best case fill at 100 %, and 46 of the 46 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 171.0 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 | 171gr | Barnes Match Burner BT they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Hodgdon 50BMG burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.