Load Specifications
Load data in caliber 7 mm Rem. Ultra Mag. with .284 | 151gr | Warner Tool Co. Flat Line bullet and 50 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% | 56,971 psi | 89% | 2877 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 48,776 psi | 76% | 2825 fps | 96.4% |
| Accurate MAGPRO | <<locked>> | 84% | 56,072 psi | 88% | 2979 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 84% | 57,696 psi | 90% | 2966 fps | 100% |
| ADI AR 2213 | <<locked>> | 86% | 56,536 psi | 89% | 2976 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 94% | 55,956 psi | 88% | 2959 fps | 100% |
| ADI AR 2218 | <<locked>> | 98% | 56,811 psi | 89% | 3071 fps | 98.9% |
| ADI AR 2225 | <<locked>> | 96% | 55,405 psi | 87% | 2976 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 57,261 psi | 90% | 2953 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 86% | 57,043 psi | 89% | 2972 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 86% | 55,390 psi | 87% | 2884 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 56,043 psi | 88% | 2953 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 55,970 psi | 88% | 2963 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 54,694 psi | 86% | 2982 fps | 98.2% |
| Alliant Reloder-50 | <<locked>> | 98% | 54,897 psi | 86% | 2976 fps | 97.8% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 57,029 psi | 89% | 2936 fps | 98.7% |
| Bofors RP15 | <<locked>> | 88% | 56,463 psi | 88% | 2963 fps | 100% |
| Bofors RP30 | <<locked>> | 92% | 55,999 psi | 88% | 2969 fps | 100% |
| Bofors RP5 | <<locked>> | 86% | 57,043 psi | 89% | 2972 fps | 100% |
| Hodgdon H1000 | <<locked>> | 92% | 57,406 psi | 90% | 2976 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 55,390 psi | 87% | 2913 fps | 99.5% |
| Hodgdon H4831 SC | <<locked>> | 84% | 54,346 psi | 85% | 2897 fps | 99.4% |
| Hodgdon Retumbo | <<locked>> | 90% | 55,390 psi | 87% | 3041 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,855 psi | 59% | 1936 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 55,506 psi | 87% | 2890 fps | 99.6% |
| IMR 7828 SSC | <<locked>> | 86% | 55,056 psi | 86% | 2963 fps | 99.8% |
| IMR 8133 Enduron | <<locked>> | 98% | 54,404 psi | 85% | 2959 fps | 99.9% |
| Lovex S071 | <<locked>> | 90% | 55,303 psi | 87% | 2854 fps | 100% |
| Norma 217 | <<locked>> | 98% | 55,811 psi | 87% | 2979 fps | 100% |
| Norma MRP | <<locked>> | 84% | 57,377 psi | 90% | 2989 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 56,449 psi | 88% | 2982 fps | 100% |
| Ramshot Magnum | <<locked>> | 88% | 55,158 psi | 86% | 2910 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,856 psi | 61% | 1978 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 56,492 psi | 89% | 3022 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 55,811 psi | 87% | 2989 fps | 99.6% |
| Rottweil R 904 | <<locked>> | 82% | 54,476 psi | 85% | 2881 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 84% | 57,276 psi | 90% | 2949 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 50,720 psi | 79% | 2838 fps | 96.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 56,898 psi | 89% | 2943 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 55,840 psi | 88% | 2864 fps | 99.6% |
| Somchem S385 | <<locked>> | 84% | 57,580 psi | 90% | 2913 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 57,653 psi | 90% | 2897 fps | 100% |
| Vihtavuori N170 | <<locked>> | 92% | 57,188 psi | 90% | 2920 fps | 97.2% |
| Vihtavuori N555 | <<locked>> | 84% | 56,884 psi | 89% | 2910 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 56,666 psi | 89% | 2992 fps | 99.7% |
| Vihtavuori N565 | <<locked>> | 88% | 54,244 psi | 85% | 2927 fps | 99.6% |
| Vihtavuori N568 | <<locked>> | 92% | 56,144 psi | 88% | 2992 fps | 99.3% |
| Vihtavuori N570 | <<locked>> | 94% | 57,740 psi | 90% | 3061 fps | 98.4% |
| Winchester StaBALL HD | <<locked>> | 86% | 55,927 psi | 88% | 2966 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 57,537 psi | 90% | 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% | 46,441 psi | 73% | 2720 fps | 100% |
| Accurate 8700 | <<locked>> | 98% | 45,223 psi | 71% | 2759 fps | 95.3% |
| Accurate MAGPRO | <<locked>> | 80% | 48,544 psi | 76% | 2854 fps | 98.3% |
| ADI AR 2209 | <<locked>> | 80% | 50,488 psi | 79% | 2851 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 80% | 45,745 psi | 72% | 2795 fps | 98.6% |
| ADI AR 2217 | <<locked>> | 80% | 34,098 psi | 53% | 2536 fps | 95.4% |
| ADI AR 2218 | 89.8 gr | 92% | 45,382 psi | 71% | 2854 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 80% | 31,473 psi | 49% | 2503 fps | 97.4% |
| Alliant Reloder-19 | <<locked>> | 80% | 50,299 psi | 79% | 2844 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 46,528 psi | 73% | 2802 fps | 99.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 45,237 psi | 71% | 2733 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 39,450 psi | 62% | 2680 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 80% | 52,011 psi | 82% | 2904 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 88% | 43,381 psi | 68% | 2779 fps | 95.2% |
| Alliant Reloder-50 | <<locked>> | 94% | 47,065 psi | 74% | 2835 fps | 95.8% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 43,787 psi | 69% | 2703 fps | 95.6% |
| Bofors RP15 | <<locked>> | 80% | 43,265 psi | 68% | 2736 fps | 98.9% |
| Bofors RP30 | <<locked>> | 80% | 36,854 psi | 58% | 2612 fps | 96.6% |
| Bofors RP5 | <<locked>> | 80% | 46,528 psi | 73% | 2802 fps | 99.5% |
| Hodgdon H1000 | <<locked>> | 80% | 37,115 psi | 58% | 2612 fps | 97.3% |
| Hodgdon H4831 | <<locked>> | 80% | 48,269 psi | 76% | 2795 fps | 98.6% |
| Hodgdon H4831 SC | <<locked>> | 80% | 47,384 psi | 74% | 2779 fps | 98.4% |
| Hodgdon Retumbo | 73.7 gr | 80% | 38,522 psi | 60% | 2726 fps | 98.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,398 psi | 45% | 1736 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 48,849 psi | 77% | 2779 fps | 98.8% |
| IMR 7828 SSC | <<locked>> | 80% | 44,512 psi | 70% | 2779 fps | 98.4% |
| IMR 8133 Enduron | <<locked>> | 84% | 33,417 psi | 52% | 2543 fps | 95% |
| Lovex S071 | <<locked>> | 80% | 39,929 psi | 63% | 2598 fps | 99.7% |
| Norma 217 | <<locked>> | 80% | 29,240 psi | 46% | 2448 fps | 95.3% |
| Norma MRP | <<locked>> | 80% | 49,763 psi | 78% | 2871 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 44,933 psi | 70% | 2792 fps | 98.8% |
| Ramshot Magnum | <<locked>> | 80% | 40,596 psi | 64% | 2667 fps | 99.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,182 psi | 46% | 1778 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 38,174 psi | 60% | 2700 fps | 99.5% |
| ReloadSwiss RS 80 | <<locked>> | 82% | 37,971 psi | 60% | 2654 fps | 95.4% |
| Rottweil R 904 | <<locked>> | 80% | 50,850 psi | 80% | 2822 fps | 99.4% |
| Rottweil R 905 | <<locked>> | 80% | 49,951 psi | 78% | 2835 fps | 99.8% |
| SNPE Vectan SP 13 | <<locked>> | 98% | 47,239 psi | 74% | 2779 fps | 95.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 49,603 psi | 78% | 2828 fps | 99.8% |
| Somchem S361 | <<locked>> | 80% | 52,272 psi | 82% | 2808 fps | 99.2% |
| Somchem S385 | <<locked>> | 80% | 50,401 psi | 79% | 2805 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 44,150 psi | 69% | 2684 fps | 99.4% |
| Vihtavuori N170 | <<locked>> | 88% | 49,879 psi | 78% | 2802 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 80% | 49,850 psi | 78% | 2808 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 49,240 psi | 77% | 2867 fps | 98.9% |
| Vihtavuori N565 | <<locked>> | 80% | 41,089 psi | 64% | 2687 fps | 97.3% |
| Vihtavuori N568 | <<locked>> | 82% | 38,972 psi | 61% | 2674 fps | 95.2% |
| Vihtavuori N570 | 84.1 gr | 88% | 46,224 psi | 72% | 2854 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 44,527 psi | 70% | 2795 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 46,702 psi | 73% | 2740 fps | 99.5% |
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 57 powders for 7 mm Rem. Ultra Mag. loaded with the .284 | 151gr | Warner Tool Co. Flat Line. ADI AR 2218 delivers the highest muzzle velocity at 3,071 fps; across all powders the maximum-charge window runs from 1,936 fps to 3,071 fps. Accurate 8700 gives the best case fill at 100 %, and 57 of the 57 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 151.0 gr projectile in 0.284" calls for a 1:8.5 twist; slower twists will usually not stabilise this weight. Accurate 8700, Hodgdon TrailBoss, Hodgdon US 869 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 | 151gr | Warner Tool Co. Flat Line they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Hodgdon US 869, IMR 7977 Enduron, Lovex D100 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.