Load Specifications
Load data in caliber 7 mm Rem. Ultra Mag. with .284 | 150gr | Hornady GMX bullet and 51 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ADI AR 2218 and Vihtavuori N570.
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>> | 86% | 55,912 psi | 88% | 2874 fps | 100% |
| Accurate MAGPRO | <<locked>> | 84% | 55,172 psi | 86% | 2976 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 84% | 57,145 psi | 90% | 2966 fps | 100% |
| ADI AR 2213 | <<locked>> | 86% | 55,869 psi | 88% | 2976 fps | 99.8% |
| ADI AR 2217 | <<locked>> | 94% | 55,187 psi | 86% | 2956 fps | 100% |
| ADI AR 2218 | <<locked>> | 98% | 56,159 psi | 88% | 3071 fps | 98.8% |
| ADI AR 2225 | <<locked>> | 96% | 54,665 psi | 86% | 2972 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 57,261 psi | 90% | 2959 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 56,666 psi | 89% | 2953 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 86% | 56,289 psi | 88% | 2969 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 86% | 54,404 psi | 85% | 2881 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 55,201 psi | 87% | 2949 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 55,216 psi | 87% | 2959 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 53,896 psi | 84% | 2979 fps | 98% |
| Alliant Reloder-50 | <<locked>> | 98% | 53,751 psi | 84% | 2963 fps | 97.6% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 56,434 psi | 88% | 2936 fps | 98.6% |
| Bofors RP15 | <<locked>> | 88% | 55,680 psi | 87% | 2959 fps | 100% |
| Bofors RP30 | <<locked>> | 92% | 54,998 psi | 86% | 2963 fps | 99.9% |
| Bofors RP5 | <<locked>> | 86% | 56,289 psi | 88% | 2969 fps | 100% |
| Hodgdon H1000 | <<locked>> | 92% | 56,811 psi | 89% | 2976 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 54,752 psi | 86% | 2910 fps | 99.5% |
| Hodgdon H4831 SC | <<locked>> | 86% | 57,450 psi | 90% | 2953 fps | 99.7% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 57,188 psi | 90% | 2871 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 54,563 psi | 86% | 3035 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,666 psi | 59% | 1942 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 54,969 psi | 86% | 2890 fps | 99.6% |
| IMR 7828 SSC | <<locked>> | 86% | 54,375 psi | 85% | 2959 fps | 99.8% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 57,392 psi | 90% | 3009 fps | 100% |
| Lovex S071 | <<locked>> | 90% | 54,041 psi | 85% | 2848 fps | 100% |
| Norma 217 | <<locked>> | 98% | 54,868 psi | 86% | 2976 fps | 100% |
| Norma MRP | <<locked>> | 84% | 56,521 psi | 89% | 2982 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 55,637 psi | 87% | 2979 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 88% | 54,230 psi | 85% | 2904 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,624 psi | 61% | 1985 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 55,695 psi | 87% | 3018 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 54,810 psi | 86% | 2979 fps | 99.5% |
| Rottweil R 904 | <<locked>> | 84% | 57,392 psi | 90% | 2933 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 84% | 56,391 psi | 88% | 2946 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 49,748 psi | 78% | 2831 fps | 96.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 56,028 psi | 88% | 2940 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 55,158 psi | 86% | 2864 fps | 99.5% |
| Somchem S385 | <<locked>> | 84% | 56,753 psi | 89% | 2913 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 56,898 psi | 89% | 2897 fps | 100% |
| Vihtavuori N170 | <<locked>> | 92% | 56,347 psi | 88% | 2917 fps | 97.1% |
| Vihtavuori N555 | <<locked>> | 84% | 56,028 psi | 88% | 2907 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 55,898 psi | 88% | 2989 fps | 99.7% |
| Vihtavuori N565 | <<locked>> | 90% | 57,072 psi | 89% | 2979 fps | 99.8% |
| Vihtavuori N568 | <<locked>> | 92% | 55,288 psi | 87% | 2986 fps | 99.2% |
| Vihtavuori N570 | <<locked>> | 94% | 56,869 psi | 89% | 3054 fps | 98.2% |
| Winchester StaBALL HD | <<locked>> | 86% | 55,143 psi | 86% | 2963 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 56,797 psi | 89% | 2910 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% | 45,252 psi | 71% | 2707 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 47,688 psi | 75% | 2848 fps | 98.1% |
| ADI AR 2209 | <<locked>> | 80% | 49,748 psi | 78% | 2848 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 80% | 44,991 psi | 71% | 2789 fps | 98.4% |
| ADI AR 2217 | <<locked>> | 82% | 35,708 psi | 56% | 2585 fps | 96.1% |
| ADI AR 2218 | 90.8 gr | 92% | 44,585 psi | 70% | 2848 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 80% | 30,545 psi | 48% | 2484 fps | 96.9% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 50,024 psi | 78% | 2848 fps | 99.7% |
| Alliant Reloder-19 | <<locked>> | 80% | 49,545 psi | 78% | 2838 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 80% | 45,643 psi | 72% | 2792 fps | 99.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 44,338 psi | 69% | 2726 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 38,551 psi | 60% | 2667 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 51,082 psi | 80% | 2897 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 45,948 psi | 72% | 2835 fps | 96% |
| Alliant Reloder-50 | <<locked>> | 94% | 45,963 psi | 72% | 2818 fps | 95.4% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 43,134 psi | 68% | 2697 fps | 95.3% |
| Bofors RP15 | <<locked>> | 80% | 42,380 psi | 66% | 2726 fps | 98.7% |
| Bofors RP30 | <<locked>> | 80% | 35,839 psi | 56% | 2595 fps | 96.1% |
| Bofors RP5 | <<locked>> | 80% | 45,643 psi | 72% | 2792 fps | 99.3% |
| Hodgdon H1000 | <<locked>> | 80% | 36,260 psi | 57% | 2602 fps | 96.9% |
| Hodgdon H4831 | <<locked>> | 80% | 47,485 psi | 74% | 2789 fps | 98.4% |
| Hodgdon H4831 SC | <<locked>> | 80% | 46,601 psi | 73% | 2772 fps | 98.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 53,476 psi | 84% | 2822 fps | 100% |
| Hodgdon Retumbo | 74.5 gr | 80% | 37,608 psi | 59% | 2713 fps | 98.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,297 psi | 44% | 1745 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 48,196 psi | 76% | 2779 fps | 98.7% |
| IMR 7828 SSC | <<locked>> | 80% | 43,671 psi | 68% | 2769 fps | 98.2% |
| IMR 8133 Enduron | <<locked>> | 86% | 34,809 psi | 55% | 2582 fps | 95.5% |
| Lovex S071 | <<locked>> | 80% | 38,812 psi | 61% | 2585 fps | 99.5% |
| Norma 217 | <<locked>> | 82% | 30,371 psi | 48% | 2480 fps | 95.8% |
| Norma MRP | <<locked>> | 80% | 48,776 psi | 76% | 2861 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 44,193 psi | 69% | 2785 fps | 98.6% |
| Ramshot Magnum | <<locked>> | 80% | 39,697 psi | 62% | 2654 fps | 98.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,051 psi | 46% | 1788 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 37,144 psi | 58% | 2684 fps | 99.2% |
| ReloadSwiss RS 80 | <<locked>> | 84% | 39,987 psi | 63% | 2703 fps | 96.1% |
| Rottweil R 904 | <<locked>> | 80% | 50,357 psi | 79% | 2825 fps | 99.3% |
| Rottweil R 905 | <<locked>> | 80% | 49,095 psi | 77% | 2828 fps | 99.7% |
| SNPE Vectan SP 13 | <<locked>> | 98% | 46,267 psi | 73% | 2766 fps | 95.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 48,747 psi | 76% | 2825 fps | 99.7% |
| Somchem S361 | <<locked>> | 80% | 51,430 psi | 81% | 2805 fps | 99.1% |
| Somchem S385 | <<locked>> | 80% | 49,487 psi | 78% | 2799 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 80% | 43,308 psi | 68% | 2677 fps | 99.3% |
| Vihtavuori N170 | <<locked>> | 88% | 49,081 psi | 77% | 2795 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 80% | 48,979 psi | 77% | 2805 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 48,341 psi | 76% | 2861 fps | 98.7% |
| Vihtavuori N565 | <<locked>> | 80% | 40,016 psi | 63% | 2671 fps | 96.8% |
| Vihtavuori N568 | <<locked>> | 84% | 40,973 psi | 64% | 2723 fps | 95.9% |
| Vihtavuori N570 | 85.1 gr | 88% | 45,382 psi | 71% | 2844 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 43,381 psi | 68% | 2785 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 45,832 psi | 72% | 2733 fps | 99.3% |
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 51 powders for 7 mm Rem. Ultra Mag. loaded with the .284 | 150gr | Hornady GMX. ADI AR 2218 delivers the highest muzzle velocity at 3,071 fps; across all powders the maximum-charge window runs from 1,942 fps to 3,071 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 51 of the 51 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.284" calls for a 1:9.5 twist; slower twists will usually not stabilise this weight. Hodgdon TrailBoss, IMR 8133 Enduron, 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. Hodgdon Retumbo, ADI AR 2218, Vihtavuori N570 rank at the top here: for 7 mm Rem. Ultra Mag. with the .284 | 150gr | Hornady GMX 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.