Load Specifications
Load data in caliber 7 mm Rem. Ultra Mag. with .284 | 139gr | Hornady InterLock FP 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 ReloadSwiss RS 80.
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% | 54,940 psi | 86% | 2933 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 51,459 psi | 81% | 2940 fps | 96.7% |
| Accurate MAGPRO | <<locked>> | 82% | 54,172 psi | 85% | 3028 fps | 99% |
| ADI AR 2209 | <<locked>> | 82% | 55,651 psi | 87% | 3018 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 54,549 psi | 85% | 3031 fps | 99.6% |
| ADI AR 2217 | <<locked>> | 92% | 54,360 psi | 85% | 3012 fps | 99.8% |
| ADI AR 2218 | <<locked>> | 96% | 55,506 psi | 87% | 3123 fps | 98.4% |
| ADI AR 2225 | <<locked>> | 94% | 54,259 psi | 85% | 3035 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 55,448 psi | 87% | 3012 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 55,187 psi | 86% | 3028 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 86% | 57,334 psi | 90% | 2992 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 54,375 psi | 85% | 3009 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 57,696 psi | 90% | 3104 fps | 98.4% |
| Alliant Reloder-50 | <<locked>> | 96% | 53,751 psi | 84% | 3018 fps | 97.2% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 55,230 psi | 87% | 2986 fps | 98.1% |
| Bofors RP15 | <<locked>> | 86% | 54,781 psi | 86% | 3022 fps | 99.9% |
| Bofors RP30 | <<locked>> | 90% | 54,447 psi | 85% | 3025 fps | 99.8% |
| Bofors RP5 | <<locked>> | 84% | 55,187 psi | 86% | 3028 fps | 100% |
| Hodgdon H1000 | <<locked>> | 90% | 55,753 psi | 87% | 3031 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 57,188 psi | 90% | 3022 fps | 99.5% |
| Hodgdon H4831 SC | <<locked>> | 84% | 56,028 psi | 88% | 3005 fps | 99.4% |
| Hodgdon Retumbo | <<locked>> | 88% | 53,911 psi | 84% | 3094 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,797 psi | 59% | 2028 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 57,174 psi | 90% | 3002 fps | 99.6% |
| IMR 7828 SSC | <<locked>> | 86% | 57,174 psi | 90% | 3077 fps | 99.8% |
| IMR 8133 Enduron | <<locked>> | 98% | 57,043 psi | 89% | 3071 fps | 99.9% |
| Lovex S071 | <<locked>> | 90% | 57,058 psi | 89% | 2963 fps | 100% |
| Norma 217 | <<locked>> | 96% | 54,723 psi | 86% | 3038 fps | 100% |
| Norma MRP | <<locked>> | 82% | 55,448 psi | 87% | 3041 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 54,491 psi | 85% | 3031 fps | 99.8% |
| Ramshot Magnum | <<locked>> | 88% | 57,464 psi | 90% | 3022 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,885 psi | 61% | 2073 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 54,911 psi | 86% | 3074 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 54,476 psi | 85% | 3038 fps | 99.2% |
| Rottweil R 904 | <<locked>> | 82% | 55,927 psi | 88% | 2989 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 82% | 55,114 psi | 86% | 3002 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 53,359 psi | 84% | 2953 fps | 96.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 54,752 psi | 86% | 2995 fps | 99.9% |
| Somchem S361 | <<locked>> | 82% | 57,653 psi | 90% | 2976 fps | 99.6% |
| Somchem S385 | <<locked>> | 82% | 55,448 psi | 87% | 2969 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 55,738 psi | 87% | 2956 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 55,564 psi | 87% | 2976 fps | 96.6% |
| Vihtavuori N555 | <<locked>> | 82% | 55,201 psi | 87% | 2972 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 54,737 psi | 86% | 3041 fps | 99.4% |
| Vihtavuori N565 | <<locked>> | 88% | 56,420 psi | 88% | 3038 fps | 99.7% |
| Vihtavuori N568 | <<locked>> | 90% | 54,723 psi | 86% | 3045 fps | 98.9% |
| Vihtavuori N570 | <<locked>> | 92% | 56,115 psi | 88% | 3107 fps | 97.7% |
| Winchester StaBALL HD | <<locked>> | 84% | 54,549 psi | 85% | 3025 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 55,390 psi | 87% | 2963 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% | 47,979 psi | 75% | 2825 fps | 100% |
| Accurate 8700 | <<locked>> | 98% | 47,776 psi | 75% | 2871 fps | 95.6% |
| Accurate MAGPRO | <<locked>> | 80% | 50,415 psi | 79% | 2963 fps | 98.3% |
| ADI AR 2209 | <<locked>> | 80% | 51,924 psi | 81% | 2959 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 80% | 47,282 psi | 74% | 2904 fps | 98.6% |
| ADI AR 2217 | <<locked>> | 80% | 35,288 psi | 55% | 2631 fps | 95.3% |
| ADI AR 2218 | 97.2 gr | 92% | 47,471 psi | 74% | 2969 fps | 96.1% |
| ADI AR 2225 | <<locked>> | 80% | 32,663 psi | 51% | 2598 fps | 97.4% |
| Alliant Reloder-19 | <<locked>> | 80% | 51,851 psi | 81% | 2953 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 48,066 psi | 75% | 2907 fps | 99.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 46,673 psi | 73% | 2835 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 40,901 psi | 64% | 2779 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 88% | 45,730 psi | 72% | 2884 fps | 95.4% |
| Alliant Reloder-50 | <<locked>> | 94% | 49,908 psi | 78% | 2949 fps | 96.1% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 45,136 psi | 71% | 2805 fps | 95.6% |
| Bofors RP15 | <<locked>> | 80% | 44,730 psi | 70% | 2841 fps | 98.8% |
| Bofors RP30 | <<locked>> | 80% | 38,319 psi | 60% | 2710 fps | 96.5% |
| Bofors RP5 | <<locked>> | 80% | 48,066 psi | 75% | 2907 fps | 99.4% |
| Hodgdon H1000 | <<locked>> | 80% | 38,450 psi | 60% | 2713 fps | 97.3% |
| Hodgdon H4831 | <<locked>> | 80% | 49,632 psi | 78% | 2900 fps | 98.5% |
| Hodgdon H4831 SC | <<locked>> | 80% | 48,791 psi | 76% | 2884 fps | 98.4% |
| Hodgdon Retumbo | 79.8 gr | 80% | 40,030 psi | 63% | 2831 fps | 98.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,340 psi | 44% | 1824 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 50,111 psi | 79% | 2884 fps | 98.7% |
| IMR 7828 SSC | <<locked>> | 80% | 46,093 psi | 72% | 2887 fps | 98.4% |
| IMR 8133 Enduron | <<locked>> | 86% | 37,536 psi | 59% | 2700 fps | 96.1% |
| Lovex S071 | <<locked>> | 80% | 41,278 psi | 65% | 2700 fps | 99.7% |
| Norma 217 | <<locked>> | 80% | 30,574 psi | 48% | 2536 fps | 95.1% |
| Norma MRP | <<locked>> | 80% | 51,503 psi | 81% | 2979 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 46,775 psi | 73% | 2900 fps | 98.8% |
| Ramshot Magnum | <<locked>> | 80% | 42,409 psi | 66% | 2769 fps | 99.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,225 psi | 46% | 1867 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 39,914 psi | 63% | 2805 fps | 99.5% |
| ReloadSwiss RS 80 | 88.3 gr | 82% | 39,885 psi | 63% | 2759 fps | 95.5% |
| Rottweil R 904 | <<locked>> | 80% | 52,272 psi | 82% | 2930 fps | 99.3% |
| Rottweil R 905 | <<locked>> | 80% | 51,605 psi | 81% | 2943 fps | 99.8% |
| SNPE Vectan SP 13 | <<locked>> | 98% | 49,559 psi | 78% | 2887 fps | 95.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 51,256 psi | 80% | 2940 fps | 99.8% |
| Somchem S361 | <<locked>> | 80% | 53,693 psi | 84% | 2913 fps | 99.2% |
| Somchem S385 | <<locked>> | 80% | 51,880 psi | 81% | 2910 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 45,585 psi | 71% | 2789 fps | 99.4% |
| Vihtavuori N170 | <<locked>> | 88% | 51,808 psi | 81% | 2910 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 80% | 51,532 psi | 81% | 2917 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 50,894 psi | 80% | 2976 fps | 98.8% |
| Vihtavuori N565 | <<locked>> | 80% | 42,583 psi | 67% | 2785 fps | 97.2% |
| Vihtavuori N568 | <<locked>> | 82% | 40,611 psi | 64% | 2772 fps | 95.1% |
| Vihtavuori N570 | <<locked>> | 88% | 48,443 psi | 76% | 2966 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 46,659 psi | 73% | 2904 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 48,167 psi | 75% | 2844 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 56 powders for 7 mm Rem. Ultra Mag. loaded with the .284 | 139gr | Hornady InterLock FP. ADI AR 2218 delivers the highest muzzle velocity at 3,123 fps; across all powders the maximum-charge window runs from 2,028 fps to 3,123 fps. Accurate 8700 gives the best case fill at 100 %, and 56 of the 56 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 139.0 gr projectile in 0.284" calls for a 1:15.5 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, ReloadSwiss RS 80 rank at the top here: for 7 mm Rem. Ultra Mag. with the .284 | 139gr | Hornady InterLock FP 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.