Load Specifications
Load data in caliber 7 mm Rem. Ultra Mag. with .284 | 120gr | Sierra Pro-Hunter 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 and ReloadSwiss RS 76.
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% | 54,215 psi | 85% | 3077 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 57,276 psi | 90% | 3232 fps | 98.6% |
| ADI AR 2209 | <<locked>> | 84% | 55,042 psi | 86% | 3166 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 86% | 53,751 psi | 84% | 3169 fps | 98.8% |
| ADI AR 2217 | <<locked>> | 96% | 57,130 psi | 90% | 3205 fps | 99.6% |
| ADI AR 2218 | <<locked>> | 98% | 54,186 psi | 85% | 3232 fps | 96.7% |
| ADI AR 2225 | <<locked>> | 98% | 56,536 psi | 89% | 3225 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 54,824 psi | 86% | 3156 fps | 99.5% |
| Alliant Reloder-22 | <<locked>> | 86% | 54,317 psi | 85% | 3166 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 88% | 56,231 psi | 88% | 3146 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 56,971 psi | 89% | 3209 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 57,276 psi | 90% | 3225 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 56,231 psi | 88% | 3219 fps | 97% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 56,405 psi | 88% | 3202 fps | 96.6% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 54,781 psi | 86% | 3123 fps | 96.9% |
| Bofors RP15 | <<locked>> | 90% | 57,566 psi | 90% | 3219 fps | 99.8% |
| Bofors RP30 | <<locked>> | 94% | 56,971 psi | 89% | 3219 fps | 99.6% |
| Bofors RP5 | <<locked>> | 86% | 54,317 psi | 85% | 3166 fps | 99.6% |
| Hodgdon H1000 | <<locked>> | 92% | 54,404 psi | 85% | 3166 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 86% | 56,681 psi | 89% | 3166 fps | 98.8% |
| Hodgdon H4831 SC | <<locked>> | 86% | 55,521 psi | 87% | 3150 fps | 98.6% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 55,158 psi | 86% | 3087 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 56,101 psi | 88% | 3291 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,579 psi | 59% | 2159 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 57,246 psi | 90% | 3150 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 56,797 psi | 89% | 3150 fps | 98.9% |
| IMR 7828 SSC | <<locked>> | 88% | 56,188 psi | 88% | 3219 fps | 99.2% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 55,492 psi | 87% | 3196 fps | 99.4% |
| Lovex S071 | <<locked>> | 92% | 56,159 psi | 88% | 3107 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 56,681 psi | 89% | 3222 fps | 100% |
| Norma MRP | <<locked>> | 84% | 54,563 psi | 86% | 3186 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 57,725 psi | 90% | 3241 fps | 99.6% |
| Ramshot Magnum | <<locked>> | 90% | 56,492 psi | 89% | 3159 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,421 psi | 60% | 2205 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 53,374 psi | 84% | 3209 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 57,334 psi | 90% | 3232 fps | 98.9% |
| Rottweil R 904 | <<locked>> | 84% | 55,579 psi | 87% | 3140 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 84% | 54,578 psi | 86% | 3146 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 54,201 psi | 85% | 3143 fps | 99.5% |
| Somchem S361 | <<locked>> | 84% | 57,435 psi | 90% | 3120 fps | 98.9% |
| Somchem S365 | <<locked>> | 82% | 57,580 psi | 90% | 3150 fps | 100% |
| Somchem S385 | <<locked>> | 84% | 54,955 psi | 86% | 3114 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 88% | 55,114 psi | 86% | 3097 fps | 99.8% |
| Vihtavuori N555 | <<locked>> | 84% | 54,244 psi | 85% | 3123 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 53,969 psi | 85% | 3182 fps | 98.5% |
| Vihtavuori N565 | <<locked>> | 90% | 55,376 psi | 87% | 3169 fps | 98.9% |
| Vihtavuori N568 | <<locked>> | 94% | 57,392 psi | 90% | 3235 fps | 98.4% |
| Winchester StaBALL HD | <<locked>> | 88% | 56,869 psi | 89% | 3228 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 55,013 psi | 86% | 3110 fps | 99.6% |
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% | 44,005 psi | 69% | 2900 fps | 99.5% |
| Accurate MAGPRO | <<locked>> | 80% | 46,050 psi | 72% | 3022 fps | 95.9% |
| ADI AR 2209 | <<locked>> | 80% | 48,022 psi | 75% | 3041 fps | 98.5% |
| ADI AR 2213 | <<locked>> | 80% | 43,308 psi | 68% | 2969 fps | 96.3% |
| ADI AR 2217 | <<locked>> | 86% | 39,856 psi | 62% | 2874 fps | 95.6% |
| ADI AR 2218 | <<locked>> | 96% | 50,212 psi | 79% | 3153 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 82% | 31,705 psi | 50% | 2694 fps | 95.1% |
| Alliant Reloder-19 | <<locked>> | 80% | 47,877 psi | 75% | 3031 fps | 98.5% |
| Alliant Reloder-22 | <<locked>> | 80% | 44,092 psi | 69% | 2976 fps | 97.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 42,743 psi | 67% | 2923 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 37,043 psi | 58% | 2838 fps | 98.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 49,037 psi | 77% | 3094 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 51,924 psi | 81% | 3143 fps | 95.9% |
| Alliant Reloder-50 | <<locked>> | 98% | 52,025 psi | 82% | 3123 fps | 95.3% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 47,921 psi | 75% | 2995 fps | 95% |
| Bofors RP15 | <<locked>> | 80% | 40,872 psi | 64% | 2900 fps | 96.6% |
| Bofors RP30 | <<locked>> | 84% | 39,958 psi | 63% | 2887 fps | 95.7% |
| Bofors RP5 | <<locked>> | 80% | 44,092 psi | 69% | 2976 fps | 97.8% |
| Hodgdon H1000 | <<locked>> | 82% | 37,710 psi | 59% | 2828 fps | 95.4% |
| Hodgdon H4831 | <<locked>> | 80% | 45,876 psi | 72% | 2972 fps | 96.5% |
| Hodgdon H4831 SC | <<locked>> | 80% | 45,092 psi | 71% | 2956 fps | 96.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 51,634 psi | 81% | 3035 fps | 100% |
| Hodgdon Retumbo | 80.6 gr | 80% | 36,042 psi | 56% | 2864 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,108 psi | 44% | 1946 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 53,621 psi | 84% | 3094 fps | 99.8% |
| IMR 4955 Enduron | <<locked>> | 80% | 46,760 psi | 73% | 2969 fps | 96.9% |
| IMR 7828 SSC | <<locked>> | 80% | 41,887 psi | 66% | 2943 fps | 95.9% |
| IMR 8133 Enduron | <<locked>> | 90% | 38,841 psi | 61% | 2867 fps | 95.1% |
| Lovex S071 | <<locked>> | 80% | 37,623 psi | 59% | 2762 fps | 98.1% |
| Norma 217 | <<locked>> | 86% | 33,910 psi | 53% | 2759 fps | 95.3% |
| Norma MRP | <<locked>> | 80% | 47,065 psi | 74% | 3054 fps | 99.3% |
| Ramshot Grand | <<locked>> | 80% | 42,221 psi | 66% | 2953 fps | 96.4% |
| Ramshot Magnum | <<locked>> | 80% | 38,145 psi | 60% | 2818 fps | 97% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,776 psi | 45% | 1988 fps | 100% |
| ReloadSwiss RS 76 | 86.3 gr | 80% | 35,795 psi | 56% | 2838 fps | 97.1% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 45,266 psi | 71% | 3012 fps | 96% |
| Rottweil R 904 | <<locked>> | 80% | 48,689 psi | 76% | 3015 fps | 97.8% |
| Rottweil R 905 | <<locked>> | 80% | 47,500 psi | 74% | 3022 fps | 98.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 47,152 psi | 74% | 3018 fps | 98.5% |
| Somchem S361 | <<locked>> | 80% | 49,995 psi | 78% | 2995 fps | 97.6% |
| Somchem S365 | <<locked>> | 80% | 53,693 psi | 84% | 3094 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 48,037 psi | 75% | 2995 fps | 99.2% |
| Vihtavuori N165 | <<locked>> | 80% | 41,916 psi | 66% | 2858 fps | 97.8% |
| Vihtavuori N555 | <<locked>> | 80% | 47,239 psi | 74% | 3009 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 46,630 psi | 73% | 3041 fps | 96.8% |
| Vihtavuori N565 | <<locked>> | 82% | 41,626 psi | 65% | 2907 fps | 95.5% |
| Vihtavuori N568 | <<locked>> | 88% | 45,876 psi | 72% | 3022 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 41,336 psi | 65% | 2969 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 44,309 psi | 69% | 2917 fps | 97.9% |
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 49 powders for 7 mm Rem. Ultra Mag. loaded with the .284 | 120gr | Sierra Pro-Hunter. Hodgdon Retumbo delivers the highest muzzle velocity at 3,291 fps; across all powders the maximum-charge window runs from 2,159 fps to 3,291 fps. Alliant Reloder-50 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 59–90 %, leaving at least 10 % headroom. The 120.0 gr projectile in 0.284" calls for a 1:16.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-50, Hodgdon TrailBoss, IMR 8133 Enduron 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. Vihtavuori N570, Hodgdon Retumbo, ReloadSwiss RS 76 rank at the top here: for 7 mm Rem. Ultra Mag. with the .284 | 120gr | Sierra Pro-Hunter 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.