Load Specifications
Load data in caliber 7 mm Rem. Ultra Mag. with .284 | 160gr | Sierra GameKing bullet and 46 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>> | 84% | 57,392 psi | 90% | 2815 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 54,172 psi | 85% | 2854 fps | 98.3% |
| Accurate MAGPRO | <<locked>> | 82% | 56,681 psi | 89% | 2923 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 84% | 57,188 psi | 90% | 2920 fps | 100% |
| ADI AR 2217 | <<locked>> | 92% | 56,956 psi | 89% | 2904 fps | 100% |
| ADI AR 2218 | <<locked>> | 94% | 53,911 psi | 84% | 2963 fps | 99% |
| ADI AR 2225 | <<locked>> | 94% | 57,101 psi | 89% | 2927 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 57,609 psi | 90% | 2890 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 82% | 53,809 psi | 84% | 2854 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 56,072 psi | 88% | 2822 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 57,014 psi | 89% | 2894 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 56,130 psi | 88% | 2943 fps | 98.9% |
| Alliant Reloder-50 | <<locked>> | 96% | 56,623 psi | 89% | 2936 fps | 98.7% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 57,203 psi | 90% | 2877 fps | 99.2% |
| Bofors RP15 | <<locked>> | 86% | 57,203 psi | 90% | 2907 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 57,087 psi | 89% | 2920 fps | 100% |
| Bofors RP5 | <<locked>> | 82% | 53,809 psi | 84% | 2854 fps | 100% |
| Hodgdon H1000 | <<locked>> | 88% | 54,317 psi | 85% | 2864 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 55,434 psi | 87% | 2848 fps | 99.8% |
| Hodgdon H4831 SC | <<locked>> | 82% | 54,447 psi | 85% | 2835 fps | 99.7% |
| Hodgdon Retumbo | <<locked>> | 88% | 56,840 psi | 89% | 2986 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,971 psi | 60% | 1896 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 55,579 psi | 87% | 2831 fps | 99.9% |
| IMR 7828 SSC | <<locked>> | 84% | 55,666 psi | 87% | 2904 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 88% | 54,418 psi | 85% | 2782 fps | 95.9% |
| IMR 8133 Enduron | <<locked>> | 96% | 55,956 psi | 88% | 2913 fps | 100% |
| Lovex S071 | <<locked>> | 88% | 55,985 psi | 88% | 2799 fps | 100% |
| Norma 217 | <<locked>> | 96% | 57,609 psi | 90% | 2933 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 57,450 psi | 90% | 2927 fps | 100% |
| Ramshot Magnum | <<locked>> | 86% | 55,927 psi | 88% | 2854 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,001 psi | 61% | 1939 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 53,708 psi | 84% | 2907 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 57,145 psi | 90% | 2943 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 82% | 57,522 psi | 90% | 2884 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 55,753 psi | 87% | 2861 fps | 98.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 57,145 psi | 90% | 2877 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 57,682 psi | 90% | 2848 fps | 100% |
| Vihtavuori N165 | <<locked>> | 84% | 54,375 psi | 85% | 2789 fps | 100% |
| Vihtavuori N170 | <<locked>> | 88% | 53,954 psi | 85% | 2812 fps | 97.3% |
| Vihtavuori N555 | <<locked>> | 82% | 57,595 psi | 90% | 2848 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 57,217 psi | 90% | 2933 fps | 99.9% |
| Vihtavuori N565 | <<locked>> | 86% | 55,071 psi | 86% | 2874 fps | 99.9% |
| Vihtavuori N568 | <<locked>> | 90% | 57,217 psi | 90% | 2943 fps | 99.7% |
| Vihtavuori N570 | <<locked>> | 90% | 54,926 psi | 86% | 2946 fps | 98.4% |
| Winchester StaBALL HD | <<locked>> | 84% | 57,551 psi | 90% | 2907 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 57,696 psi | 90% | 2848 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% | 50,111 psi | 79% | 2713 fps | 100% |
| Accurate 8700 | <<locked>> | 94% | 43,120 psi | 68% | 2664 fps | 95.4% |
| Accurate MAGPRO | <<locked>> | 80% | 52,779 psi | 83% | 2861 fps | 99.4% |
| ADI AR 2213 | <<locked>> | 80% | 49,530 psi | 78% | 2799 fps | 99.6% |
| ADI AR 2217 | <<locked>> | 80% | 37,173 psi | 58% | 2552 fps | 97.5% |
| ADI AR 2218 | 88.8 gr | 88% | 42,902 psi | 67% | 2746 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 80% | 34,505 psi | 54% | 2526 fps | 99.2% |
| Alliant Reloder-19 | <<locked>> | 80% | 53,911 psi | 84% | 2835 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 50,314 psi | 79% | 2799 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 49,095 psi | 77% | 2723 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 43,250 psi | 68% | 2684 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 84% | 41,292 psi | 65% | 2671 fps | 95.2% |
| Alliant Reloder-50 | <<locked>> | 90% | 45,063 psi | 71% | 2736 fps | 95.9% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 46,891 psi | 73% | 2707 fps | 97.3% |
| Bofors RP15 | <<locked>> | 80% | 46,876 psi | 73% | 2740 fps | 99.7% |
| Bofors RP30 | <<locked>> | 80% | 40,364 psi | 63% | 2628 fps | 98.3% |
| Bofors RP5 | <<locked>> | 80% | 50,314 psi | 79% | 2799 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 40,466 psi | 63% | 2625 fps | 98.9% |
| Hodgdon H4831 | <<locked>> | 80% | 51,822 psi | 81% | 2792 fps | 99.5% |
| Hodgdon H4831 SC | <<locked>> | 80% | 50,894 psi | 80% | 2776 fps | 99.4% |
| Hodgdon Retumbo | <<locked>> | 80% | 42,380 psi | 66% | 2746 fps | 99.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,514 psi | 45% | 1703 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 52,098 psi | 82% | 2776 fps | 99.6% |
| IMR 7828 SSC | <<locked>> | 80% | 48,356 psi | 76% | 2785 fps | 99.5% |
| IMR 7977 Enduron | <<locked>> | 86% | 50,952 psi | 80% | 2723 fps | 95% |
| IMR 8133 Enduron | 74.2 gr | 80% | 32,111 psi | 50% | 2444 fps | 95.1% |
| Lovex S071 | <<locked>> | 80% | 43,236 psi | 68% | 2602 fps | 100% |
| Norma 217 | <<locked>> | 80% | 32,547 psi | 51% | 2470 fps | 97.6% |
| Ramshot Grand | <<locked>> | 80% | 49,284 psi | 77% | 2802 fps | 99.7% |
| Ramshot Magnum | <<locked>> | 80% | 44,628 psi | 70% | 2677 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,327 psi | 46% | 1742 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 42,366 psi | 66% | 2720 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 38,928 psi | 61% | 2612 fps | 96.5% |
| Rottweil R 905 | <<locked>> | 80% | 53,766 psi | 84% | 2828 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 94% | 45,208 psi | 71% | 2684 fps | 95.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 53,417 psi | 84% | 2825 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 54,041 psi | 85% | 2795 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 47,558 psi | 75% | 2684 fps | 99.9% |
| Vihtavuori N170 | <<locked>> | 84% | 47,137 psi | 74% | 2694 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 80% | 53,882 psi | 84% | 2795 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 53,301 psi | 84% | 2874 fps | 99.7% |
| Vihtavuori N565 | <<locked>> | 80% | 44,817 psi | 70% | 2700 fps | 98.7% |
| Vihtavuori N568 | <<locked>> | 80% | 39,842 psi | 62% | 2628 fps | 96.3% |
| Vihtavuori N570 | 83.1 gr | 84% | 44,150 psi | 69% | 2749 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 49,472 psi | 78% | 2799 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 50,169 psi | 79% | 2736 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 | 160gr | Sierra GameKing. Hodgdon Retumbo delivers the highest muzzle velocity at 2,986 fps; across all powders the maximum-charge window runs from 1,896 fps to 2,986 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 160.0 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, IMR 8133 Enduron rank at the top here: for 7 mm Rem. Ultra Mag. with the .284 | 160gr | Sierra GameKing 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.