Load Specifications
Load data in caliber 7 mm Rem. Ultra Mag. with .284 | 150gr | Sierra GameKing bullet and 49 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% | 56,057 psi | 88% | 2867 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 52,576 psi | 82% | 2890 fps | 97.5% |
| Accurate MAGPRO | <<locked>> | 82% | 55,172 psi | 86% | 2969 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 82% | 56,666 psi | 89% | 2956 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 55,608 psi | 87% | 2969 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 92% | 55,390 psi | 87% | 2953 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 56,579 psi | 89% | 3071 fps | 99% |
| ADI AR 2225 | <<locked>> | 94% | 55,347 psi | 87% | 2972 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 56,231 psi | 88% | 2943 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 56,173 psi | 88% | 2963 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 54,592 psi | 86% | 2874 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 55,434 psi | 87% | 2946 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 54,462 psi | 85% | 2979 fps | 98.3% |
| Alliant Reloder-50 | <<locked>> | 96% | 54,940 psi | 86% | 2972 fps | 98% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 56,028 psi | 88% | 2927 fps | 98.7% |
| Bofors RP15 | <<locked>> | 86% | 55,811 psi | 87% | 2956 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 55,405 psi | 87% | 2963 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 56,173 psi | 88% | 2963 fps | 100% |
| Hodgdon H1000 | <<locked>> | 90% | 56,811 psi | 89% | 2969 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 54,259 psi | 85% | 2900 fps | 99.5% |
| Hodgdon H4831 SC | <<locked>> | 84% | 56,971 psi | 89% | 2943 fps | 99.7% |
| Hodgdon Retumbo | <<locked>> | 88% | 55,201 psi | 87% | 3035 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,971 psi | 60% | 1955 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 54,404 psi | 85% | 2881 fps | 99.6% |
| IMR 7828 SSC | <<locked>> | 84% | 54,288 psi | 85% | 2953 fps | 99.8% |
| IMR 7977 Enduron | <<locked>> | 90% | 56,840 psi | 89% | 2884 fps | 95.8% |
| IMR 8133 Enduron | <<locked>> | 96% | 54,331 psi | 85% | 2956 fps | 99.9% |
| Lovex S071 | <<locked>> | 88% | 54,505 psi | 85% | 2848 fps | 100% |
| Norma 217 | <<locked>> | 96% | 55,825 psi | 87% | 2979 fps | 100% |
| Norma MRP | <<locked>> | 82% | 56,536 psi | 89% | 2979 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 55,796 psi | 87% | 2976 fps | 100% |
| Ramshot Magnum | <<locked>> | 86% | 54,476 psi | 85% | 2904 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,957 psi | 61% | 2001 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 56,318 psi | 88% | 3015 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 55,477 psi | 87% | 2982 fps | 99.6% |
| Rottweil R 904 | <<locked>> | 82% | 56,811 psi | 89% | 2923 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 82% | 56,130 psi | 88% | 2933 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 54,317 psi | 85% | 2900 fps | 97.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 55,753 psi | 87% | 2933 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 56,478 psi | 89% | 2904 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 56,768 psi | 89% | 2890 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 56,405 psi | 88% | 2913 fps | 97.3% |
| Vihtavuori N555 | <<locked>> | 82% | 56,202 psi | 88% | 2904 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 55,811 psi | 87% | 2982 fps | 99.7% |
| Vihtavuori N565 | <<locked>> | 88% | 57,406 psi | 90% | 2979 fps | 99.9% |
| Vihtavuori N568 | <<locked>> | 90% | 55,753 psi | 87% | 2986 fps | 99.4% |
| Vihtavuori N570 | <<locked>> | 92% | 57,290 psi | 90% | 3054 fps | 98.4% |
| Winchester StaBALL HD | <<locked>> | 84% | 55,738 psi | 87% | 2959 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 56,376 psi | 88% | 2900 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% | 48,863 psi | 77% | 2762 fps | 100% |
| Accurate 8700 | <<locked>> | 96% | 45,049 psi | 71% | 2756 fps | 95.4% |
| Accurate MAGPRO | <<locked>> | 80% | 51,445 psi | 81% | 2907 fps | 98.9% |
| ADI AR 2209 | <<locked>> | 80% | 52,953 psi | 83% | 2897 fps | 100% |
| ADI AR 2213 | <<locked>> | 80% | 48,225 psi | 76% | 2844 fps | 99.1% |
| ADI AR 2217 | <<locked>> | 80% | 36,100 psi | 57% | 2589 fps | 96.5% |
| ADI AR 2218 | 92.4 gr | 90% | 44,962 psi | 70% | 2851 fps | 96% |
| ADI AR 2225 | <<locked>> | 80% | 33,431 psi | 52% | 2556 fps | 98.4% |
| Alliant Reloder-19 | <<locked>> | 80% | 52,678 psi | 83% | 2887 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 48,994 psi | 77% | 2848 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 47,688 psi | 75% | 2772 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 41,930 psi | 66% | 2726 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 86% | 43,250 psi | 68% | 2769 fps | 95.2% |
| Alliant Reloder-50 | <<locked>> | 92% | 47,137 psi | 74% | 2835 fps | 96% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 45,890 psi | 72% | 2749 fps | 96.5% |
| Bofors RP15 | <<locked>> | 80% | 45,687 psi | 72% | 2785 fps | 99.3% |
| Bofors RP30 | <<locked>> | 80% | 39,160 psi | 61% | 2664 fps | 97.5% |
| Bofors RP5 | <<locked>> | 80% | 48,994 psi | 77% | 2848 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 80% | 39,407 psi | 62% | 2667 fps | 98.2% |
| Hodgdon H4831 | <<locked>> | 80% | 50,546 psi | 79% | 2841 fps | 99.1% |
| Hodgdon H4831 SC | <<locked>> | 80% | 49,647 psi | 78% | 2825 fps | 98.9% |
| Hodgdon Retumbo | 77.5 gr | 80% | 40,988 psi | 64% | 2779 fps | 99.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,514 psi | 45% | 1759 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 51,010 psi | 80% | 2825 fps | 99.2% |
| IMR 7828 SSC | <<locked>> | 80% | 47,007 psi | 74% | 2831 fps | 99% |
| IMR 7977 Enduron | <<locked>> | 88% | 53,258 psi | 83% | 2825 fps | 95% |
| IMR 8133 Enduron | <<locked>> | 84% | 35,766 psi | 56% | 2595 fps | 96.1% |
| Lovex S071 | <<locked>> | 80% | 42,032 psi | 66% | 2641 fps | 99.9% |
| Norma 217 | <<locked>> | 80% | 31,386 psi | 49% | 2497 fps | 96.5% |
| Norma MRP | <<locked>> | 80% | 52,692 psi | 83% | 2920 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 47,921 psi | 75% | 2848 fps | 99.3% |
| Ramshot Magnum | <<locked>> | 80% | 43,337 psi | 68% | 2720 fps | 99.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,298 psi | 46% | 1801 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 40,930 psi | 64% | 2756 fps | 99.9% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 37,623 psi | 59% | 2641 fps | 95.4% |
| Rottweil R 904 | <<locked>> | 80% | 53,214 psi | 83% | 2867 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 80% | 52,460 psi | 82% | 2881 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 96% | 47,079 psi | 74% | 2776 fps | 95.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 52,127 psi | 82% | 2874 fps | 99.9% |
| Somchem S385 | <<locked>> | 80% | 52,765 psi | 83% | 2848 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 46,398 psi | 73% | 2730 fps | 99.7% |
| Vihtavuori N170 | <<locked>> | 86% | 49,211 psi | 77% | 2795 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 80% | 52,576 psi | 82% | 2851 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 52,040 psi | 82% | 2920 fps | 99.4% |
| Vihtavuori N565 | <<locked>> | 80% | 43,526 psi | 68% | 2740 fps | 98% |
| Vihtavuori N568 | <<locked>> | 80% | 38,653 psi | 61% | 2664 fps | 95.1% |
| Vihtavuori N570 | 86.5 gr | 86% | 46,006 psi | 72% | 2851 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 47,776 psi | 75% | 2844 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 49,095 psi | 77% | 2789 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 49 powders for 7 mm Rem. Ultra Mag. loaded with the .284 | 150gr | Sierra GameKing. ADI AR 2218 delivers the highest muzzle velocity at 3,071 fps; across all powders the maximum-charge window runs from 1,955 fps to 3,071 fps. Accurate 8700 gives the best case fill at 100 %, and 49 of the 49 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 150.0 gr projectile in 0.284" calls for a 1:12.0 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 | 150gr | Sierra GameKing 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.