Load Specifications
Load data in caliber 7 mm Rem. Ultra Mag. with .284 | 120gr | Barnes X BT bullet and 47 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ReloadSwiss RS 76 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>> | 86% | 56,478 psi | 89% | 3110 fps | 100% |
| Accurate MAGPRO | <<locked>> | 84% | 54,839 psi | 86% | 3192 fps | 98.1% |
| ADI AR 2209 | <<locked>> | 84% | 56,202 psi | 88% | 3186 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 86% | 54,911 psi | 86% | 3189 fps | 98.9% |
| ADI AR 2217 | <<locked>> | 94% | 54,041 psi | 85% | 3156 fps | 99.2% |
| ADI AR 2218 | <<locked>> | 98% | 55,216 psi | 87% | 3251 fps | 96.7% |
| ADI AR 2225 | <<locked>> | 98% | 57,363 psi | 90% | 3245 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 55,898 psi | 88% | 3173 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 86% | 55,796 psi | 87% | 3192 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 88% | 57,508 psi | 90% | 3163 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 54,375 psi | 85% | 3176 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 54,636 psi | 86% | 3192 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 57,290 psi | 90% | 3241 fps | 97.1% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 55,405 psi | 87% | 3133 fps | 96.9% |
| Bofors RP15 | <<locked>> | 88% | 55,216 psi | 87% | 3182 fps | 99.5% |
| Bofors RP30 | <<locked>> | 92% | 54,679 psi | 86% | 3182 fps | 99.2% |
| Bofors RP5 | <<locked>> | 86% | 55,796 psi | 87% | 3192 fps | 99.6% |
| Hodgdon H1000 | <<locked>> | 92% | 55,347 psi | 87% | 3182 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 86% | 57,696 psi | 90% | 3182 fps | 98.8% |
| Hodgdon H4831 SC | <<locked>> | 86% | 56,710 psi | 89% | 3166 fps | 98.7% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 56,550 psi | 89% | 3104 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 57,203 psi | 90% | 3317 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,869 psi | 59% | 2152 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 54,317 psi | 85% | 3104 fps | 98.4% |
| IMR 7828 SSC | <<locked>> | 88% | 57,232 psi | 90% | 3235 fps | 99.2% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 56,768 psi | 89% | 3222 fps | 99.5% |
| Lovex S071 | <<locked>> | 90% | 54,824 psi | 86% | 3084 fps | 100% |
| Norma 217 | <<locked>> | 98% | 54,317 psi | 85% | 3196 fps | 100% |
| Norma MRP | <<locked>> | 84% | 55,999 psi | 88% | 3212 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 54,650 psi | 86% | 3192 fps | 99.2% |
| Ramshot Magnum | <<locked>> | 88% | 53,679 psi | 84% | 3120 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,812 psi | 61% | 2198 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 54,563 psi | 86% | 3238 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 54,476 psi | 85% | 3192 fps | 98.3% |
| Rottweil R 904 | <<locked>> | 84% | 56,681 psi | 89% | 3150 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 84% | 55,854 psi | 88% | 3166 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 55,463 psi | 87% | 3163 fps | 99.6% |
| Somchem S361 | <<locked>> | 82% | 54,926 psi | 86% | 3077 fps | 98.4% |
| Somchem S385 | <<locked>> | 84% | 56,521 psi | 89% | 3140 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 88% | 56,391 psi | 88% | 3114 fps | 99.8% |
| Vihtavuori N555 | <<locked>> | 84% | 56,057 psi | 88% | 3150 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 55,187 psi | 86% | 3205 fps | 98.6% |
| Vihtavuori N565 | <<locked>> | 90% | 57,000 psi | 89% | 3199 fps | 99.1% |
| Vihtavuori N568 | <<locked>> | 92% | 54,636 psi | 86% | 3192 fps | 97.8% |
| Vihtavuori N570 | <<locked>> | 94% | 55,985 psi | 88% | 3255 fps | 96.3% |
| Winchester StaBALL HD | <<locked>> | 86% | 54,143 psi | 85% | 3199 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 56,289 psi | 88% | 3127 fps | 99.7% |
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% | 46,282 psi | 73% | 2940 fps | 99.7% |
| Accurate MAGPRO | <<locked>> | 80% | 47,587 psi | 75% | 3058 fps | 96.3% |
| ADI AR 2209 | <<locked>> | 80% | 49,153 psi | 77% | 3061 fps | 98.7% |
| ADI AR 2213 | <<locked>> | 80% | 44,614 psi | 70% | 2995 fps | 96.6% |
| ADI AR 2217 | <<locked>> | 84% | 38,638 psi | 61% | 2844 fps | 95% |
| ADI AR 2218 | <<locked>> | 96% | 51,329 psi | 80% | 3176 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 80% | 31,618 psi | 50% | 2694 fps | 95% |
| Alliant Reloder-19 | <<locked>> | 80% | 49,124 psi | 77% | 3054 fps | 98.7% |
| Alliant Reloder-22 | <<locked>> | 80% | 45,716 psi | 72% | 3012 fps | 98.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 44,483 psi | 70% | 2959 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 38,696 psi | 61% | 2884 fps | 99.2% |
| Alliant Reloder-26 | <<locked>> | 80% | 50,894 psi | 80% | 3133 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 49,443 psi | 77% | 3104 fps | 95% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 48,718 psi | 76% | 3012 fps | 95% |
| Bofors RP15 | <<locked>> | 80% | 42,612 psi | 67% | 2943 fps | 97.2% |
| Bofors RP30 | <<locked>> | 82% | 39,175 psi | 61% | 2874 fps | 95.4% |
| Bofors RP5 | <<locked>> | 80% | 45,716 psi | 72% | 3012 fps | 98.1% |
| Hodgdon H1000 | <<locked>> | 82% | 39,334 psi | 62% | 2864 fps | 96% |
| Hodgdon H4831 | <<locked>> | 80% | 47,195 psi | 74% | 2995 fps | 96.7% |
| Hodgdon H4831 SC | <<locked>> | 80% | 46,412 psi | 73% | 2982 fps | 96.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 53,011 psi | 83% | 3054 fps | 100% |
| Hodgdon Retumbo | 78 gr | 80% | 37,913 psi | 59% | 2917 fps | 96.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,398 psi | 45% | 1936 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 47,892 psi | 75% | 2986 fps | 97.1% |
| IMR 7828 SSC | <<locked>> | 80% | 43,439 psi | 68% | 2979 fps | 96.3% |
| IMR 8133 Enduron | <<locked>> | 90% | 40,640 psi | 64% | 2920 fps | 95.9% |
| Lovex S071 | <<locked>> | 80% | 40,205 psi | 63% | 2818 fps | 98.8% |
| Norma 217 | <<locked>> | 84% | 33,765 psi | 53% | 2766 fps | 95.4% |
| Norma MRP | <<locked>> | 80% | 48,631 psi | 76% | 3084 fps | 99.5% |
| Ramshot Grand | <<locked>> | 80% | 43,671 psi | 68% | 2989 fps | 96.8% |
| Ramshot Magnum | <<locked>> | 80% | 39,987 psi | 63% | 2864 fps | 97.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,167 psi | 46% | 1982 fps | 100% |
| ReloadSwiss RS 76 | 83.4 gr | 80% | 37,637 psi | 59% | 2894 fps | 97.8% |
| ReloadSwiss RS 80 | 90.4 gr | 86% | 43,598 psi | 68% | 2982 fps | 95.4% |
| Rottweil R 904 | <<locked>> | 80% | 49,821 psi | 78% | 3035 fps | 98% |
| Rottweil R 905 | <<locked>> | 80% | 49,081 psi | 77% | 3051 fps | 98.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 48,747 psi | 76% | 3045 fps | 98.7% |
| Somchem S361 | <<locked>> | 80% | 51,358 psi | 80% | 3015 fps | 97.8% |
| Somchem S385 | <<locked>> | 80% | 49,734 psi | 78% | 3025 fps | 99.4% |
| Vihtavuori N165 | <<locked>> | 80% | 43,468 psi | 68% | 2887 fps | 98.1% |
| Vihtavuori N555 | <<locked>> | 80% | 49,385 psi | 77% | 3045 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 48,037 psi | 75% | 3074 fps | 97.1% |
| Vihtavuori N565 | <<locked>> | 80% | 40,843 psi | 64% | 2890 fps | 95.1% |
| Vihtavuori N568 | <<locked>> | 88% | 47,601 psi | 75% | 3064 fps | 96% |
| Vihtavuori N570 | <<locked>> | 92% | 51,996 psi | 81% | 3182 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 43,221 psi | 68% | 3018 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 45,890 psi | 72% | 2946 fps | 98.1% |
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 55 powders for 7 mm Rem. Ultra Mag. loaded with the .284 | 120gr | Barnes X BT. Hodgdon Retumbo delivers the highest muzzle velocity at 3,317 fps; across all powders the maximum-charge window runs from 2,152 fps to 3,317 fps. Accurate 8700 gives the best case fill at 100 %, and 55 of the 55 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 1:11.5 twist; slower twists will usually not stabilise this weight. Accurate 8700, 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. Hodgdon Retumbo, ReloadSwiss RS 76, ReloadSwiss RS 80 rank at the top here: for 7 mm Rem. Ultra Mag. with the .284 | 120gr | Barnes X BT they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 8700, IMR 7977 Enduron, Lovex D100 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.