Load Specifications
Load data in caliber 7 mm Rem. Ultra Mag. with .284 | 140gr | 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>> | 86% | 56,217 psi | 88% | 2949 fps | 100% |
| Accurate MAGPRO | <<locked>> | 84% | 55,288 psi | 87% | 3048 fps | 99% |
| ADI AR 2209 | <<locked>> | 84% | 57,130 psi | 90% | 3041 fps | 100% |
| ADI AR 2213 | <<locked>> | 86% | 55,883 psi | 88% | 3051 fps | 99.7% |
| ADI AR 2217 | <<locked>> | 94% | 55,158 psi | 86% | 3025 fps | 99.8% |
| ADI AR 2218 | <<locked>> | 98% | 56,173 psi | 88% | 3136 fps | 98.3% |
| ADI AR 2225 | <<locked>> | 96% | 54,737 psi | 86% | 3048 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 56,681 psi | 89% | 3025 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 86% | 56,449 psi | 88% | 3045 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 86% | 54,520 psi | 85% | 2956 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 55,201 psi | 87% | 3025 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 55,201 psi | 87% | 3035 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 53,954 psi | 85% | 3045 fps | 97.6% |
| Alliant Reloder-50 | <<locked>> | 98% | 54,114 psi | 85% | 3031 fps | 97.1% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 56,405 psi | 88% | 3002 fps | 98.2% |
| Bofors RP15 | <<locked>> | 88% | 55,854 psi | 88% | 3035 fps | 100% |
| Bofors RP30 | <<locked>> | 92% | 55,259 psi | 87% | 3038 fps | 99.8% |
| Bofors RP5 | <<locked>> | 86% | 56,449 psi | 88% | 3045 fps | 100% |
| Hodgdon H1000 | <<locked>> | 92% | 56,536 psi | 89% | 3045 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 54,708 psi | 86% | 2982 fps | 99.2% |
| Hodgdon H4831 SC | <<locked>> | 86% | 57,508 psi | 90% | 3025 fps | 99.5% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 57,217 psi | 90% | 2949 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 54,375 psi | 85% | 3107 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,681 psi | 59% | 2008 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 54,998 psi | 86% | 2966 fps | 99.3% |
| IMR 7828 SSC | <<locked>> | 86% | 54,230 psi | 85% | 3028 fps | 99.5% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 57,537 psi | 90% | 3081 fps | 99.9% |
| Lovex S071 | <<locked>> | 90% | 54,418 psi | 85% | 2927 fps | 100% |
| Norma 217 | <<locked>> | 98% | 54,911 psi | 86% | 3045 fps | 100% |
| Norma MRP | <<locked>> | 84% | 56,449 psi | 88% | 3058 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 55,608 psi | 87% | 3051 fps | 99.8% |
| Ramshot Magnum | <<locked>> | 88% | 54,389 psi | 85% | 2979 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,638 psi | 61% | 2054 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 55,782 psi | 87% | 3094 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 55,187 psi | 86% | 3054 fps | 99.3% |
| Rottweil R 904 | <<locked>> | 84% | 57,421 psi | 90% | 3005 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 84% | 56,492 psi | 89% | 3018 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 56,115 psi | 88% | 3015 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 55,332 psi | 87% | 2936 fps | 99.3% |
| Somchem S385 | <<locked>> | 84% | 56,913 psi | 89% | 2986 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 57,029 psi | 89% | 2972 fps | 100% |
| Vihtavuori N170 | <<locked>> | 92% | 56,710 psi | 89% | 2989 fps | 96.6% |
| Vihtavuori N555 | <<locked>> | 84% | 56,144 psi | 88% | 2986 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 55,796 psi | 87% | 3061 fps | 99.4% |
| Vihtavuori N565 | <<locked>> | 90% | 57,377 psi | 90% | 3054 fps | 99.7% |
| Vihtavuori N568 | <<locked>> | 92% | 55,317 psi | 87% | 3058 fps | 98.9% |
| Vihtavuori N570 | <<locked>> | 94% | 56,768 psi | 89% | 3120 fps | 97.8% |
| Winchester StaBALL HD | <<locked>> | 86% | 55,027 psi | 86% | 3038 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 56,710 psi | 89% | 2979 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% | 45,730 psi | 72% | 2785 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 47,863 psi | 75% | 2917 fps | 97.6% |
| ADI AR 2209 | <<locked>> | 80% | 49,777 psi | 78% | 2920 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 80% | 44,991 psi | 71% | 2858 fps | 98% |
| ADI AR 2217 | <<locked>> | 82% | 35,897 psi | 56% | 2648 fps | 95.5% |
| ADI AR 2218 | 94.9 gr | 94% | 48,283 psi | 76% | 2982 fps | 96.2% |
| ADI AR 2225 | <<locked>> | 80% | 30,922 psi | 48% | 2552 fps | 96.4% |
| Alliant Reloder-19 | <<locked>> | 80% | 49,588 psi | 78% | 2910 fps | 99.5% |
| Alliant Reloder-22 | <<locked>> | 80% | 45,788 psi | 72% | 2864 fps | 99% |
| Alliant Reloder-23 | <<locked>> | 80% | 44,585 psi | 70% | 2802 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 38,740 psi | 61% | 2736 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 51,242 psi | 80% | 2976 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 46,224 psi | 72% | 2900 fps | 95.4% |
| Alliant Reloder-50 | <<locked>> | 96% | 50,183 psi | 79% | 2959 fps | 96.1% |
| Baschieri & Pellagri 109 | <<locked>> | 82% | 46,180 psi | 72% | 2825 fps | 95.7% |
| Bofors RP15 | <<locked>> | 80% | 42,627 psi | 67% | 2799 fps | 98.3% |
| Bofors RP30 | <<locked>> | 80% | 36,172 psi | 57% | 2664 fps | 95.6% |
| Bofors RP5 | <<locked>> | 80% | 45,788 psi | 72% | 2864 fps | 99% |
| Hodgdon H1000 | <<locked>> | 80% | 36,448 psi | 57% | 2664 fps | 96.4% |
| Hodgdon H4831 | <<locked>> | 80% | 47,529 psi | 74% | 2858 fps | 98% |
| Hodgdon H4831 SC | <<locked>> | 80% | 46,659 psi | 73% | 2841 fps | 97.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 53,432 psi | 84% | 2897 fps | 100% |
| Hodgdon Retumbo | 76.2 gr | 80% | 37,782 psi | 59% | 2779 fps | 98% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,253 psi | 44% | 1804 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 48,254 psi | 76% | 2848 fps | 98.3% |
| IMR 7828 SSC | <<locked>> | 80% | 43,729 psi | 69% | 2841 fps | 97.7% |
| IMR 8133 Enduron | <<locked>> | 86% | 35,186 psi | 55% | 2651 fps | 95% |
| Lovex S071 | <<locked>> | 80% | 39,305 psi | 62% | 2661 fps | 99.3% |
| Norma 217 | <<locked>> | 82% | 30,792 psi | 48% | 2552 fps | 95.3% |
| Norma MRP | <<locked>> | 80% | 48,979 psi | 77% | 2936 fps | 99.9% |
| Ramshot Grand | <<locked>> | 80% | 44,135 psi | 69% | 2851 fps | 98.2% |
| Ramshot Magnum | <<locked>> | 80% | 39,972 psi | 63% | 2726 fps | 98.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,008 psi | 45% | 1847 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 37,507 psi | 59% | 2756 fps | 98.9% |
| ReloadSwiss RS 80 | <<locked>> | 84% | 40,277 psi | 63% | 2772 fps | 95.6% |
| Rottweil R 904 | <<locked>> | 80% | 50,256 psi | 79% | 2890 fps | 99% |
| Rottweil R 905 | <<locked>> | 80% | 49,255 psi | 77% | 2904 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 48,907 psi | 77% | 2897 fps | 99.5% |
| Somchem S361 | <<locked>> | 80% | 51,532 psi | 81% | 2877 fps | 98.8% |
| Somchem S385 | <<locked>> | 80% | 49,690 psi | 78% | 2874 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 80% | 43,511 psi | 68% | 2746 fps | 99% |
| Vihtavuori N170 | <<locked>> | 90% | 52,866 psi | 83% | 2927 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 80% | 49,168 psi | 77% | 2881 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 48,472 psi | 76% | 2933 fps | 98.3% |
| Vihtavuori N565 | <<locked>> | 80% | 40,480 psi | 63% | 2746 fps | 96.4% |
| Vihtavuori N568 | <<locked>> | 84% | 41,278 psi | 65% | 2795 fps | 95.3% |
| Vihtavuori N570 | 89 gr | 90% | 49,066 psi | 77% | 2982 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 43,656 psi | 68% | 2864 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 45,934 psi | 72% | 2805 fps | 99.1% |
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 | 140gr | Sierra GameKing. ADI AR 2218 delivers the highest muzzle velocity at 3,136 fps; across all powders the maximum-charge window runs from 2,008 fps to 3,136 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 140.0 gr projectile in 0.284" calls for a 1:10.0 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 | 140gr | Sierra GameKing they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Hodgdon US 869, Lovex D100, Ramshot LRT 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.