Load Specifications
Load data in caliber 7 mm Rem. Ultra Mag. with .284 | 150gr | Barnes X S bullet and 40 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 ReloadSwiss RS 80.
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% | 55,158 psi | 86% | 2848 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 54,723 psi | 86% | 2920 fps | 97.9% |
| Accurate MAGPRO | <<locked>> | 82% | 57,435 psi | 90% | 2999 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 84% | 57,450 psi | 90% | 2989 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 92% | 57,188 psi | 90% | 2972 fps | 100% |
| ADI AR 2218 | <<locked>> | 94% | 54,244 psi | 85% | 3028 fps | 98.5% |
| ADI AR 2225 | <<locked>> | 94% | 57,290 psi | 90% | 2999 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 82% | 54,737 psi | 86% | 2933 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 56,797 psi | 89% | 2897 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 57,537 psi | 90% | 2969 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 56,753 psi | 89% | 3015 fps | 98.6% |
| Alliant Reloder-50 | <<locked>> | 94% | 54,114 psi | 85% | 2956 fps | 97.7% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 57,246 psi | 90% | 2936 fps | 98.8% |
| Bofors RP15 | <<locked>> | 84% | 54,418 psi | 85% | 2927 fps | 100% |
| Bofors RP30 | <<locked>> | 88% | 54,302 psi | 85% | 2940 fps | 99.9% |
| Bofors RP5 | <<locked>> | 82% | 54,737 psi | 86% | 2933 fps | 100% |
| Hodgdon H1000 | <<locked>> | 88% | 54,650 psi | 86% | 2933 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 56,028 psi | 88% | 2920 fps | 99.6% |
| Hodgdon H4831 SC | <<locked>> | 82% | 55,100 psi | 86% | 2904 fps | 99.6% |
| Hodgdon Retumbo | <<locked>> | 88% | 57,101 psi | 89% | 3061 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,116 psi | 60% | 1949 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 55,912 psi | 88% | 2894 fps | 99.7% |
| IMR 7828 SSC | <<locked>> | 84% | 56,260 psi | 88% | 2979 fps | 99.9% |
| IMR 8133 Enduron | <<locked>> | 96% | 56,869 psi | 89% | 2992 fps | 100% |
| Lovex S071 | <<locked>> | 88% | 57,377 psi | 90% | 2877 fps | 100% |
| Norma 217 | <<locked>> | 94% | 54,795 psi | 86% | 2959 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 53,766 psi | 84% | 2940 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 86% | 56,695 psi | 89% | 2927 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,349 psi | 62% | 1995 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 54,302 psi | 85% | 2986 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 53,969 psi | 85% | 2956 fps | 99.4% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 56,579 psi | 89% | 2930 fps | 97.8% |
| Vihtavuori N165 | <<locked>> | 84% | 55,056 psi | 86% | 2858 fps | 100% |
| Vihtavuori N170 | <<locked>> | 88% | 55,013 psi | 86% | 2884 fps | 96.9% |
| Vihtavuori N560 | <<locked>> | 82% | 57,740 psi | 90% | 3005 fps | 99.8% |
| Vihtavuori N565 | <<locked>> | 86% | 56,173 psi | 88% | 2953 fps | 99.8% |
| Vihtavuori N568 | <<locked>> | 88% | 54,302 psi | 85% | 2959 fps | 99.1% |
| Vihtavuori N570 | <<locked>> | 90% | 55,651 psi | 87% | 3022 fps | 98.1% |
| Winchester StaBALL HD | <<locked>> | 82% | 54,389 psi | 85% | 2940 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 82% | 54,607 psi | 86% | 2867 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% | 51,880 psi | 81% | 2799 fps | 100% |
| Accurate 8700 | <<locked>> | 94% | 44,237 psi | 69% | 2740 fps | 95.1% |
| Accurate MAGPRO | <<locked>> | 80% | 53,679 psi | 84% | 2940 fps | 99.2% |
| ADI AR 2213 | <<locked>> | 80% | 50,212 psi | 79% | 2874 fps | 99.4% |
| ADI AR 2217 | <<locked>> | 80% | 38,189 psi | 60% | 2628 fps | 97.2% |
| ADI AR 2218 | 88.3 gr | 88% | 43,918 psi | 69% | 2822 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 80% | 35,911 psi | 56% | 2615 fps | 99.1% |
| Alliant Reloder-22 | <<locked>> | 80% | 51,314 psi | 80% | 2881 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 50,024 psi | 78% | 2802 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 44,295 psi | 69% | 2766 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 84% | 42,612 psi | 67% | 2756 fps | 95% |
| Alliant Reloder-50 | <<locked>> | 90% | 46,963 psi | 74% | 2828 fps | 95.9% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 47,398 psi | 74% | 2769 fps | 96.8% |
| Bofors RP15 | <<locked>> | 80% | 47,819 psi | 75% | 2818 fps | 99.6% |
| Bofors RP30 | <<locked>> | 80% | 41,843 psi | 66% | 2717 fps | 98.3% |
| Bofors RP5 | <<locked>> | 80% | 51,314 psi | 80% | 2881 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 80% | 41,510 psi | 65% | 2703 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 80% | 52,533 psi | 82% | 2864 fps | 99.3% |
| Hodgdon H4831 SC | <<locked>> | 80% | 51,634 psi | 81% | 2848 fps | 99.2% |
| Hodgdon Retumbo | <<locked>> | 80% | 43,366 psi | 68% | 2825 fps | 99.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,790 psi | 45% | 1752 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 52,721 psi | 83% | 2844 fps | 99.4% |
| IMR 7828 SSC | <<locked>> | 80% | 49,124 psi | 77% | 2861 fps | 99.3% |
| IMR 8133 Enduron | <<locked>> | 80% | 33,736 psi | 53% | 2543 fps | 95.3% |
| Lovex S071 | <<locked>> | 80% | 45,092 psi | 71% | 2687 fps | 100% |
| Norma 217 | <<locked>> | 80% | 34,345 psi | 54% | 2572 fps | 97.8% |
| Ramshot Grand | <<locked>> | 80% | 50,125 psi | 79% | 2881 fps | 99.6% |
| Ramshot Magnum | <<locked>> | 80% | 45,730 psi | 72% | 2756 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,646 psi | 46% | 1795 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 43,410 psi | 68% | 2805 fps | 100% |
| ReloadSwiss RS 80 | 81.7 gr | 80% | 40,437 psi | 63% | 2703 fps | 96.5% |
| SNPE Vectan SP 13 | <<locked>> | 94% | 46,543 psi | 73% | 2762 fps | 95.4% |
| Vihtavuori N165 | <<locked>> | 80% | 48,602 psi | 76% | 2756 fps | 99.9% |
| Vihtavuori N170 | <<locked>> | 84% | 48,356 psi | 76% | 2769 fps | 95.2% |
| Vihtavuori N560 | <<locked>> | 80% | 53,925 psi | 85% | 2943 fps | 99.5% |
| Vihtavuori N565 | <<locked>> | 80% | 46,209 psi | 72% | 2782 fps | 98.6% |
| Vihtavuori N568 | <<locked>> | 80% | 41,118 psi | 64% | 2713 fps | 96.1% |
| Vihtavuori N570 | 82.6 gr | 84% | 45,266 psi | 71% | 2831 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 50,502 psi | 79% | 2884 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 51,140 psi | 80% | 2812 fps | 99.9% |
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 40 powders for 7 mm Rem. Ultra Mag. loaded with the .284 | 150gr | Barnes X S. Hodgdon Retumbo delivers the highest muzzle velocity at 3,061 fps; across all powders the maximum-charge window runs from 1,949 fps to 3,061 fps. Accurate 8700 gives the best case fill at 100 %, and 40 of the 40 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 150.0 gr projectile in 0.284" calls for a 1:10.5 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, ReloadSwiss RS 80 rank at the top here: for 7 mm Rem. Ultra Mag. with the .284 | 150gr | Barnes X S 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.