Load Specifications
Load data in caliber 7 mm Rem. Ultra Mag. with .284 | 158gr | Sellier & Bellot HPC 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>> | 84% | 55,956 psi | 88% | 2812 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 52,272 psi | 82% | 2841 fps | 97.8% |
| Accurate MAGPRO | <<locked>> | 82% | 55,230 psi | 87% | 2920 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 82% | 56,608 psi | 89% | 2897 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 55,695 psi | 87% | 2917 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 92% | 55,434 psi | 87% | 2897 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 56,333 psi | 88% | 3018 fps | 99.2% |
| ADI AR 2225 | <<locked>> | 94% | 55,158 psi | 86% | 2917 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 56,971 psi | 89% | 2894 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 56,405 psi | 88% | 2887 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 56,304 psi | 88% | 2910 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 54,549 psi | 85% | 2818 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 55,477 psi | 87% | 2890 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 54,317 psi | 85% | 2930 fps | 98.5% |
| Alliant Reloder-50 | <<locked>> | 96% | 54,563 psi | 86% | 2923 fps | 98.2% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 56,043 psi | 88% | 2874 fps | 98.9% |
| Bofors RP15 | <<locked>> | 86% | 55,738 psi | 87% | 2900 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 55,376 psi | 87% | 2910 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 56,304 psi | 88% | 2910 fps | 100% |
| Hodgdon H1000 | <<locked>> | 90% | 56,811 psi | 89% | 2917 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 54,259 psi | 85% | 2848 fps | 99.7% |
| Hodgdon H4831 SC | <<locked>> | 84% | 57,087 psi | 89% | 2887 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 88% | 55,129 psi | 86% | 2979 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,029 psi | 60% | 1906 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 54,331 psi | 85% | 2825 fps | 99.7% |
| IMR 7828 SSC | <<locked>> | 84% | 54,389 psi | 85% | 2900 fps | 99.9% |
| IMR 7977 Enduron | <<locked>> | 90% | 56,768 psi | 89% | 2828 fps | 96.2% |
| IMR 8133 Enduron | <<locked>> | 96% | 54,273 psi | 85% | 2904 fps | 100% |
| Lovex S071 | <<locked>> | 88% | 54,534 psi | 85% | 2792 fps | 100% |
| Norma 217 | <<locked>> | 96% | 55,811 psi | 87% | 2927 fps | 100% |
| Norma MRP | <<locked>> | 82% | 56,507 psi | 89% | 2923 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 55,840 psi | 88% | 2923 fps | 100% |
| Ramshot Magnum | <<locked>> | 86% | 54,259 psi | 85% | 2848 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,030 psi | 61% | 1949 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 56,072 psi | 88% | 2959 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 55,434 psi | 87% | 2933 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 82% | 56,942 psi | 89% | 2867 fps | 100% |
| Rottweil R 905 | <<locked>> | 82% | 56,231 psi | 88% | 2881 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 54,070 psi | 85% | 2851 fps | 97.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 55,912 psi | 88% | 2877 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 56,492 psi | 89% | 2848 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 56,724 psi | 89% | 2838 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 56,376 psi | 88% | 2864 fps | 97.6% |
| Vihtavuori N555 | <<locked>> | 82% | 56,275 psi | 88% | 2848 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 55,767 psi | 87% | 2927 fps | 99.8% |
| Vihtavuori N565 | <<locked>> | 88% | 57,406 psi | 90% | 2923 fps | 100% |
| Vihtavuori N568 | <<locked>> | 90% | 55,535 psi | 87% | 2933 fps | 99.5% |
| Vihtavuori N570 | <<locked>> | 92% | 57,145 psi | 90% | 2999 fps | 98.7% |
| Winchester StaBALL HD | <<locked>> | 84% | 55,709 psi | 87% | 2904 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 56,333 psi | 88% | 2844 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% | 48,921 psi | 77% | 2710 fps | 100% |
| Accurate 8700 | <<locked>> | 96% | 44,918 psi | 70% | 2713 fps | 95.8% |
| Accurate MAGPRO | <<locked>> | 80% | 51,387 psi | 81% | 2858 fps | 99.1% |
| ADI AR 2209 | <<locked>> | 80% | 53,026 psi | 83% | 2844 fps | 100% |
| ADI AR 2213 | <<locked>> | 80% | 48,327 psi | 76% | 2795 fps | 99.4% |
| ADI AR 2217 | <<locked>> | 80% | 36,143 psi | 57% | 2543 fps | 96.9% |
| ADI AR 2218 | 87.5 gr | 88% | 41,597 psi | 65% | 2730 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 80% | 33,475 psi | 52% | 2516 fps | 98.7% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 53,243 psi | 83% | 2841 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 52,736 psi | 83% | 2835 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 49,081 psi | 77% | 2795 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 47,819 psi | 75% | 2723 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 42,003 psi | 66% | 2677 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 86% | 43,178 psi | 68% | 2726 fps | 95.7% |
| Alliant Reloder-50 | <<locked>> | 90% | 43,569 psi | 68% | 2720 fps | 95.2% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 45,934 psi | 72% | 2703 fps | 96.9% |
| Bofors RP15 | <<locked>> | 80% | 45,701 psi | 72% | 2733 fps | 99.5% |
| Bofors RP30 | <<locked>> | 80% | 39,218 psi | 61% | 2621 fps | 97.9% |
| Bofors RP5 | <<locked>> | 80% | 49,081 psi | 77% | 2795 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 80% | 39,334 psi | 62% | 2618 fps | 98.5% |
| Hodgdon H4831 | <<locked>> | 80% | 50,662 psi | 79% | 2789 fps | 99.3% |
| Hodgdon H4831 SC | <<locked>> | 80% | 49,763 psi | 78% | 2776 fps | 99.2% |
| Hodgdon Retumbo | 75.1 gr | 80% | 41,075 psi | 64% | 2736 fps | 99.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,558 psi | 45% | 1709 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 51,039 psi | 80% | 2772 fps | 99.4% |
| IMR 7828 SSC | <<locked>> | 80% | 47,108 psi | 74% | 2779 fps | 99.2% |
| IMR 7977 Enduron | <<locked>> | 88% | 53,287 psi | 84% | 2776 fps | 95.4% |
| IMR 8133 Enduron | <<locked>> | 82% | 33,330 psi | 52% | 2493 fps | 95.6% |
| Lovex S071 | <<locked>> | 80% | 42,061 psi | 66% | 2592 fps | 100% |
| Norma 217 | <<locked>> | 80% | 31,531 psi | 49% | 2461 fps | 97% |
| Norma MRP | <<locked>> | 80% | 52,533 psi | 82% | 2864 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 47,950 psi | 75% | 2799 fps | 99.5% |
| Ramshot Magnum | <<locked>> | 80% | 43,265 psi | 68% | 2671 fps | 99.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,370 psi | 46% | 1752 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 40,959 psi | 64% | 2710 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 37,637 psi | 59% | 2598 fps | 95.9% |
| Rottweil R 904 | <<locked>> | 80% | 53,214 psi | 83% | 2812 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 80% | 52,518 psi | 82% | 2825 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 94% | 43,903 psi | 69% | 2674 fps | 95% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 52,170 psi | 82% | 2822 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 52,852 psi | 83% | 2795 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 46,470 psi | 73% | 2677 fps | 99.9% |
| Vihtavuori N170 | <<locked>> | 86% | 49,182 psi | 77% | 2746 fps | 96% |
| Vihtavuori N555 | <<locked>> | 80% | 52,591 psi | 82% | 2795 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 51,880 psi | 81% | 2864 fps | 99.5% |
| Vihtavuori N565 | <<locked>> | 80% | 43,511 psi | 68% | 2690 fps | 98.3% |
| Vihtavuori N568 | <<locked>> | 80% | 38,551 psi | 60% | 2618 fps | 95.6% |
| Vihtavuori N570 | 83.8 gr | 86% | 45,977 psi | 72% | 2805 fps | 96.1% |
| Winchester StaBALL HD | <<locked>> | 80% | 47,776 psi | 75% | 2792 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 49,052 psi | 77% | 2733 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 50 powders for 7 mm Rem. Ultra Mag. loaded with the .284 | 158gr | Sellier & Bellot HPC. ADI AR 2218 delivers the highest muzzle velocity at 3,018 fps; across all powders the maximum-charge window runs from 1,906 fps to 3,018 fps. Accurate 8700 gives the best case fill at 100 %, and 50 of the 50 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 158.0 gr projectile in 0.284" calls for a 1:9.5 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. Hodgdon Retumbo, ADI AR 2218, Vihtavuori N570 rank at the top here: for 7 mm Rem. Ultra Mag. with the .284 | 158gr | Sellier & Bellot HPC 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.