Load Specifications
Load data in caliber 7 mm Rem. Ultra Mag. with .284 | 155gr | Geco EXPRESS 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>> | 84% | 56,115 psi | 88% | 2835 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 52,591 psi | 82% | 2858 fps | 97.7% |
| Accurate MAGPRO | <<locked>> | 82% | 55,521 psi | 87% | 2940 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 82% | 56,855 psi | 89% | 2917 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 55,869 psi | 88% | 2936 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 92% | 55,666 psi | 87% | 2920 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 56,753 psi | 89% | 3041 fps | 99.2% |
| ADI AR 2225 | <<locked>> | 94% | 55,521 psi | 87% | 2940 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 57,188 psi | 90% | 2920 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 57,188 psi | 90% | 2920 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 56,608 psi | 89% | 2910 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 56,463 psi | 88% | 2930 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 54,766 psi | 86% | 2841 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 55,782 psi | 87% | 2913 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 54,563 psi | 86% | 2949 fps | 98.5% |
| Alliant Reloder-50 | <<locked>> | 96% | 54,955 psi | 86% | 2940 fps | 98.1% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 56,217 psi | 88% | 2894 fps | 98.8% |
| Bofors RP15 | <<locked>> | 86% | 56,101 psi | 88% | 2923 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 55,666 psi | 87% | 2933 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 56,463 psi | 88% | 2930 fps | 100% |
| Hodgdon H1000 | <<locked>> | 90% | 57,087 psi | 89% | 2936 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 54,462 psi | 85% | 2867 fps | 99.6% |
| Hodgdon H4831 SC | <<locked>> | 84% | 57,246 psi | 90% | 2910 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 88% | 55,405 psi | 87% | 3002 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,029 psi | 60% | 1926 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 54,520 psi | 85% | 2848 fps | 99.7% |
| IMR 7828 SSC | <<locked>> | 84% | 54,549 psi | 85% | 2920 fps | 99.9% |
| IMR 7977 Enduron | <<locked>> | 90% | 56,985 psi | 89% | 2851 fps | 96.1% |
| IMR 8133 Enduron | <<locked>> | 96% | 54,462 psi | 85% | 2923 fps | 100% |
| Lovex S071 | <<locked>> | 88% | 54,737 psi | 86% | 2815 fps | 100% |
| Norma 217 | <<locked>> | 96% | 55,999 psi | 88% | 2943 fps | 100% |
| Norma MRP | <<locked>> | 82% | 56,637 psi | 89% | 2943 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 55,970 psi | 88% | 2943 fps | 100% |
| Ramshot Magnum | <<locked>> | 86% | 54,708 psi | 86% | 2871 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,030 psi | 61% | 1969 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 56,507 psi | 89% | 2982 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 55,738 psi | 87% | 2953 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 82% | 57,145 psi | 90% | 2890 fps | 100% |
| Rottweil R 905 | <<locked>> | 82% | 56,478 psi | 89% | 2904 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 54,462 psi | 85% | 2871 fps | 97.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 56,115 psi | 88% | 2900 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 56,666 psi | 89% | 2867 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 56,826 psi | 89% | 2854 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 56,521 psi | 89% | 2884 fps | 97.5% |
| Vihtavuori N555 | <<locked>> | 82% | 56,347 psi | 88% | 2867 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 55,927 psi | 88% | 2946 fps | 99.8% |
| Vihtavuori N565 | <<locked>> | 88% | 57,638 psi | 90% | 2946 fps | 100% |
| Vihtavuori N568 | <<locked>> | 90% | 55,927 psi | 88% | 2956 fps | 99.5% |
| Vihtavuori N570 | <<locked>> | 92% | 57,493 psi | 90% | 3022 fps | 98.6% |
| Winchester StaBALL HD | <<locked>> | 84% | 55,941 psi | 88% | 2923 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 56,666 psi | 89% | 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% | 49,168 psi | 77% | 2733 fps | 100% |
| Accurate 8700 | <<locked>> | 96% | 45,295 psi | 71% | 2733 fps | 95.8% |
| Accurate MAGPRO | <<locked>> | 80% | 51,517 psi | 81% | 2874 fps | 99.1% |
| ADI AR 2209 | <<locked>> | 80% | 53,069 psi | 83% | 2864 fps | 100% |
| ADI AR 2213 | <<locked>> | 80% | 48,530 psi | 76% | 2815 fps | 99.3% |
| ADI AR 2217 | <<locked>> | 80% | 36,201 psi | 57% | 2559 fps | 96.8% |
| ADI AR 2218 | 88.9 gr | 88% | 41,887 psi | 66% | 2749 fps | 95% |
| ADI AR 2225 | <<locked>> | 80% | 33,663 psi | 53% | 2533 fps | 98.7% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 53,505 psi | 84% | 2861 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 53,505 psi | 84% | 2861 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 52,997 psi | 83% | 2854 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 49,298 psi | 77% | 2815 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 47,935 psi | 75% | 2743 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 42,076 psi | 66% | 2694 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 86% | 43,511 psi | 68% | 2746 fps | 95.6% |
| Alliant Reloder-50 | <<locked>> | 90% | 43,874 psi | 69% | 2740 fps | 95.1% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 46,079 psi | 72% | 2723 fps | 96.8% |
| Bofors RP15 | <<locked>> | 80% | 45,774 psi | 72% | 2753 fps | 99.5% |
| Bofors RP30 | <<locked>> | 80% | 39,450 psi | 62% | 2638 fps | 97.8% |
| Bofors RP5 | <<locked>> | 80% | 49,298 psi | 77% | 2815 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 80% | 39,552 psi | 62% | 2635 fps | 98.4% |
| Hodgdon H4831 | <<locked>> | 80% | 50,879 psi | 80% | 2812 fps | 99.3% |
| Hodgdon H4831 SC | <<locked>> | 80% | 49,966 psi | 78% | 2792 fps | 99.1% |
| Hodgdon Retumbo | 76.3 gr | 80% | 41,292 psi | 65% | 2753 fps | 99.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,572 psi | 45% | 1729 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 51,097 psi | 80% | 2792 fps | 99.4% |
| IMR 7828 SSC | <<locked>> | 80% | 47,340 psi | 74% | 2799 fps | 99.2% |
| IMR 7977 Enduron | <<locked>> | 88% | 53,374 psi | 84% | 2792 fps | 95.2% |
| IMR 8133 Enduron | <<locked>> | 82% | 33,533 psi | 53% | 2510 fps | 95.4% |
| Lovex S071 | <<locked>> | 80% | 42,206 psi | 66% | 2612 fps | 100% |
| Norma 217 | <<locked>> | 80% | 31,633 psi | 50% | 2477 fps | 96.9% |
| Norma MRP | <<locked>> | 80% | 52,924 psi | 83% | 2887 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 48,153 psi | 75% | 2815 fps | 99.5% |
| Ramshot Magnum | <<locked>> | 80% | 43,598 psi | 68% | 2690 fps | 99.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,370 psi | 46% | 1768 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 41,075 psi | 64% | 2726 fps | 99.9% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 37,884 psi | 59% | 2618 fps | 95.8% |
| Rottweil R 904 | <<locked>> | 80% | 53,505 psi | 84% | 2835 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 80% | 52,779 psi | 83% | 2848 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 96% | 47,268 psi | 74% | 2749 fps | 95.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 52,431 psi | 82% | 2844 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 53,069 psi | 83% | 2815 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 46,673 psi | 73% | 2700 fps | 99.8% |
| Vihtavuori N170 | <<locked>> | 86% | 49,385 psi | 77% | 2766 fps | 95.9% |
| Vihtavuori N555 | <<locked>> | 80% | 52,881 psi | 83% | 2818 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 52,257 psi | 82% | 2887 fps | 99.5% |
| Vihtavuori N565 | <<locked>> | 80% | 43,700 psi | 68% | 2710 fps | 98.3% |
| Vihtavuori N568 | <<locked>> | 80% | 38,870 psi | 61% | 2638 fps | 95.5% |
| Vihtavuori N570 | 85.1 gr | 86% | 46,209 psi | 72% | 2822 fps | 96% |
| Winchester StaBALL HD | <<locked>> | 80% | 48,008 psi | 75% | 2812 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 49,269 psi | 77% | 2756 fps | 99.8% |
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 | 155gr | Geco EXPRESS. ADI AR 2218 delivers the highest muzzle velocity at 3,041 fps; across all powders the maximum-charge window runs from 1,926 fps to 3,041 fps. Accurate 8700 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 60–90 %, leaving at least 10 % headroom. The 155.0 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. Hodgdon Retumbo, ADI AR 2218, Vihtavuori N570 rank at the top here: for 7 mm Rem. Ultra Mag. with the .284 | 155gr | Geco EXPRESS 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.