Load Specifications
Load data in caliber 7 mm Rem. Ultra Mag. with .284 | 150gr | Sierra MatchKing bullet and 48 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% | 55,782 psi | 87% | 2864 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 52,344 psi | 82% | 2887 fps | 97.5% |
| Accurate MAGPRO | <<locked>> | 82% | 55,085 psi | 86% | 2969 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 82% | 56,579 psi | 89% | 2953 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 55,477 psi | 87% | 2966 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 92% | 55,129 psi | 86% | 2946 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 56,304 psi | 88% | 3068 fps | 98.9% |
| ADI AR 2225 | <<locked>> | 94% | 55,071 psi | 86% | 2969 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 56,173 psi | 88% | 2943 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 56,101 psi | 88% | 2963 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 54,505 psi | 85% | 2874 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 55,317 psi | 87% | 2946 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 54,186 psi | 85% | 2976 fps | 98.2% |
| Alliant Reloder-50 | <<locked>> | 96% | 54,694 psi | 86% | 2969 fps | 97.9% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 55,796 psi | 87% | 2923 fps | 98.6% |
| Bofors RP15 | <<locked>> | 86% | 55,521 psi | 87% | 2953 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 55,347 psi | 87% | 2963 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 56,101 psi | 88% | 2963 fps | 100% |
| Hodgdon H1000 | <<locked>> | 90% | 56,507 psi | 89% | 2966 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 54,172 psi | 85% | 2900 fps | 99.5% |
| Hodgdon H4831 SC | <<locked>> | 84% | 56,884 psi | 89% | 2943 fps | 99.7% |
| Hodgdon Retumbo | <<locked>> | 88% | 54,882 psi | 86% | 3031 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,956 psi | 59% | 1955 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 54,317 psi | 85% | 2881 fps | 99.6% |
| IMR 7828 SSC | <<locked>> | 84% | 54,157 psi | 85% | 2953 fps | 99.8% |
| IMR 8133 Enduron | <<locked>> | 96% | 54,056 psi | 85% | 2949 fps | 99.9% |
| Lovex S071 | <<locked>> | 88% | 54,433 psi | 85% | 2848 fps | 100% |
| Norma 217 | <<locked>> | 96% | 55,535 psi | 87% | 2972 fps | 100% |
| Norma MRP | <<locked>> | 82% | 56,260 psi | 88% | 2976 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 55,492 psi | 87% | 2972 fps | 100% |
| Ramshot Magnum | <<locked>> | 86% | 54,157 psi | 85% | 2897 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,943 psi | 61% | 2001 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 55,985 psi | 88% | 3012 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 55,245 psi | 87% | 2979 fps | 99.6% |
| Rottweil R 904 | <<locked>> | 82% | 56,753 psi | 89% | 2920 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 82% | 56,028 psi | 88% | 2933 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 54,085 psi | 85% | 2897 fps | 97.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 55,666 psi | 87% | 2933 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 56,202 psi | 88% | 2900 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 56,478 psi | 89% | 2887 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 56,144 psi | 88% | 2913 fps | 97.2% |
| Vihtavuori N555 | <<locked>> | 82% | 55,883 psi | 88% | 2897 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 55,506 psi | 87% | 2979 fps | 99.7% |
| Vihtavuori N565 | <<locked>> | 88% | 57,116 psi | 90% | 2972 fps | 99.9% |
| Vihtavuori N568 | <<locked>> | 90% | 55,463 psi | 87% | 2986 fps | 99.3% |
| Vihtavuori N570 | <<locked>> | 92% | 57,014 psi | 89% | 3048 fps | 98.4% |
| Winchester StaBALL HD | <<locked>> | 84% | 55,390 psi | 87% | 2956 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 56,115 psi | 88% | 2894 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% | 48,747 psi | 76% | 2762 fps | 100% |
| Accurate 8700 | <<locked>> | 96% | 44,817 psi | 70% | 2753 fps | 95.3% |
| Accurate MAGPRO | <<locked>> | 80% | 51,169 psi | 80% | 2904 fps | 98.9% |
| ADI AR 2209 | <<locked>> | 80% | 52,678 psi | 83% | 2894 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 80% | 48,124 psi | 75% | 2841 fps | 99.1% |
| ADI AR 2217 | <<locked>> | 80% | 35,882 psi | 56% | 2582 fps | 96.3% |
| ADI AR 2218 | 92.1 gr | 90% | 44,715 psi | 70% | 2844 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 80% | 33,330 psi | 52% | 2556 fps | 98.3% |
| Alliant Reloder-19 | <<locked>> | 80% | 52,591 psi | 82% | 2887 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 48,892 psi | 77% | 2844 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 47,572 psi | 75% | 2772 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 41,669 psi | 65% | 2720 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 86% | 42,975 psi | 67% | 2766 fps | 95.1% |
| Alliant Reloder-50 | <<locked>> | 92% | 46,891 psi | 73% | 2828 fps | 95.9% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 45,643 psi | 72% | 2746 fps | 96.4% |
| Bofors RP15 | <<locked>> | 80% | 45,411 psi | 71% | 2782 fps | 99.3% |
| Bofors RP30 | <<locked>> | 80% | 39,073 psi | 61% | 2664 fps | 97.5% |
| Bofors RP5 | <<locked>> | 80% | 48,892 psi | 77% | 2844 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 80% | 39,160 psi | 61% | 2661 fps | 98.1% |
| Hodgdon H4831 | <<locked>> | 80% | 50,444 psi | 79% | 2838 fps | 99.1% |
| Hodgdon H4831 SC | <<locked>> | 80% | 49,545 psi | 78% | 2822 fps | 98.9% |
| Hodgdon Retumbo | 77.3 gr | 80% | 40,886 psi | 64% | 2779 fps | 99.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,485 psi | 45% | 1759 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 50,749 psi | 80% | 2822 fps | 99.2% |
| IMR 7828 SSC | <<locked>> | 80% | 46,934 psi | 74% | 2828 fps | 98.9% |
| IMR 8133 Enduron | <<locked>> | 84% | 35,679 psi | 56% | 2595 fps | 96.1% |
| Lovex S071 | <<locked>> | 80% | 41,945 psi | 66% | 2641 fps | 99.9% |
| Norma 217 | <<locked>> | 80% | 31,256 psi | 49% | 2493 fps | 96.4% |
| Norma MRP | <<locked>> | 80% | 52,373 psi | 82% | 2913 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 47,630 psi | 75% | 2841 fps | 99.3% |
| Ramshot Magnum | <<locked>> | 80% | 43,091 psi | 68% | 2717 fps | 99.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,269 psi | 46% | 1798 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 40,683 psi | 64% | 2753 fps | 99.8% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 37,521 psi | 59% | 2641 fps | 95.3% |
| Rottweil R 904 | <<locked>> | 80% | 53,142 psi | 83% | 2864 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 80% | 52,373 psi | 82% | 2877 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 96% | 46,847 psi | 73% | 2772 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 52,025 psi | 82% | 2874 fps | 99.9% |
| Somchem S385 | <<locked>> | 80% | 52,663 psi | 83% | 2848 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 46,296 psi | 73% | 2726 fps | 99.7% |
| Vihtavuori N170 | <<locked>> | 86% | 48,994 psi | 77% | 2789 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 80% | 52,475 psi | 82% | 2851 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 51,735 psi | 81% | 2917 fps | 99.3% |
| Vihtavuori N565 | <<locked>> | 80% | 43,439 psi | 68% | 2736 fps | 98% |
| Vihtavuori N568 | <<locked>> | 80% | 38,406 psi | 60% | 2657 fps | 95% |
| Vihtavuori N570 | 86.2 gr | 86% | 45,745 psi | 72% | 2848 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 47,630 psi | 75% | 2841 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 48,820 psi | 77% | 2782 fps | 99.7% |
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 48 powders for 7 mm Rem. Ultra Mag. loaded with the .284 | 150gr | Sierra MatchKing. ADI AR 2218 delivers the highest muzzle velocity at 3,068 fps; across all powders the maximum-charge window runs from 1,955 fps to 3,068 fps. Accurate 8700 gives the best case fill at 100 %, and 48 of the 48 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 1:11.5 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 | 150gr | Sierra MatchKing 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.