Load Specifications
Load data in caliber 7 mm Rem. Ultra Mag. with .284 | 133gr | MRR Green Hunting bullet and 50 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>> | 86% | 55,434 psi | 87% | 2992 fps | 100% |
| Accurate MAGPRO | <<locked>> | 84% | 54,389 psi | 85% | 3087 fps | 98.6% |
| ADI AR 2209 | <<locked>> | 84% | 56,246 psi | 88% | 3081 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 86% | 55,042 psi | 86% | 3091 fps | 99.4% |
| ADI AR 2217 | <<locked>> | 94% | 54,273 psi | 85% | 3064 fps | 99.6% |
| ADI AR 2218 | <<locked>> | 98% | 55,317 psi | 87% | 3166 fps | 97.8% |
| ADI AR 2225 | <<locked>> | 98% | 57,667 psi | 90% | 3143 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 56,376 psi | 88% | 3077 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 84% | 55,796 psi | 87% | 3068 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 86% | 55,608 psi | 87% | 3087 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 88% | 57,334 psi | 90% | 3054 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 54,230 psi | 85% | 3064 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 54,244 psi | 85% | 3077 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 57,232 psi | 90% | 3146 fps | 97.9% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 57,537 psi | 90% | 3136 fps | 97.5% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 55,695 psi | 87% | 3045 fps | 97.7% |
| Bofors RP15 | <<locked>> | 88% | 55,042 psi | 86% | 3077 fps | 99.8% |
| Bofors RP30 | <<locked>> | 92% | 54,215 psi | 85% | 3074 fps | 99.6% |
| Bofors RP5 | <<locked>> | 86% | 55,608 psi | 87% | 3087 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 92% | 55,637 psi | 87% | 3084 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 84% | 53,795 psi | 84% | 3018 fps | 98.8% |
| Hodgdon H4831 SC | <<locked>> | 86% | 56,724 psi | 89% | 3064 fps | 99.2% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 56,275 psi | 88% | 2992 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 57,493 psi | 90% | 3209 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,710 psi | 59% | 2057 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 54,244 psi | 85% | 3005 fps | 99% |
| IMR 7828 SSC | <<locked>> | 88% | 57,464 psi | 90% | 3136 fps | 99.7% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 56,681 psi | 89% | 3120 fps | 99.8% |
| Lovex S071 | <<locked>> | 92% | 57,217 psi | 90% | 3018 fps | 100% |
| Norma 217 | <<locked>> | 98% | 54,056 psi | 85% | 3084 fps | 100% |
| Norma MRP | <<locked>> | 84% | 55,767 psi | 87% | 3104 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 54,578 psi | 86% | 3087 fps | 99.6% |
| Ramshot Magnum | <<locked>> | 90% | 57,725 psi | 90% | 3077 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,624 psi | 61% | 2103 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 54,592 psi | 86% | 3130 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 54,230 psi | 85% | 3091 fps | 98.9% |
| Rottweil R 904 | <<locked>> | 84% | 56,637 psi | 89% | 3048 fps | 99.5% |
| Rottweil R 905 | <<locked>> | 84% | 55,608 psi | 87% | 3061 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 55,230 psi | 87% | 3058 fps | 99.9% |
| Somchem S361 | <<locked>> | 82% | 54,621 psi | 86% | 2976 fps | 99% |
| Somchem S385 | <<locked>> | 84% | 56,028 psi | 88% | 3028 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 56,202 psi | 88% | 3012 fps | 100% |
| Vihtavuori N170 | <<locked>> | 92% | 55,840 psi | 88% | 3022 fps | 96% |
| Vihtavuori N555 | <<locked>> | 84% | 55,448 psi | 87% | 3031 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 55,129 psi | 86% | 3100 fps | 99.1% |
| Vihtavuori N565 | <<locked>> | 90% | 56,550 psi | 89% | 3094 fps | 99.5% |
| Vihtavuori N568 | <<locked>> | 92% | 54,534 psi | 85% | 3094 fps | 98.5% |
| Vihtavuori N570 | <<locked>> | 94% | 55,854 psi | 88% | 3153 fps | 97.2% |
| Winchester StaBALL HD | <<locked>> | 86% | 54,114 psi | 85% | 3084 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 56,101 psi | 88% | 3022 fps | 99.9% |
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% | 45,049 psi | 71% | 2822 fps | 99.8% |
| Accurate MAGPRO | <<locked>> | 80% | 46,978 psi | 74% | 2946 fps | 97% |
| ADI AR 2209 | <<locked>> | 80% | 49,052 psi | 77% | 2959 fps | 99.2% |
| ADI AR 2213 | <<locked>> | 80% | 44,251 psi | 69% | 2894 fps | 97.4% |
| ADI AR 2217 | <<locked>> | 84% | 38,029 psi | 60% | 2743 fps | 95.9% |
| ADI AR 2218 | 96.5 gr | 94% | 47,485 psi | 74% | 3009 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 80% | 30,342 psi | 48% | 2572 fps | 95.4% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 49,371 psi | 77% | 2959 fps | 99.2% |
| Alliant Reloder-19 | <<locked>> | 80% | 48,907 psi | 77% | 2949 fps | 99.2% |
| Alliant Reloder-22 | <<locked>> | 80% | 45,049 psi | 71% | 2900 fps | 98.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 43,714 psi | 69% | 2841 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 38,029 psi | 60% | 2772 fps | 99.5% |
| Alliant Reloder-26 | <<locked>> | 80% | 50,328 psi | 79% | 3015 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 49,153 psi | 77% | 3005 fps | 95.9% |
| Alliant Reloder-50 | <<locked>> | 96% | 49,168 psi | 77% | 2989 fps | 95.3% |
| Baschieri & Pellagri 109 | <<locked>> | 82% | 45,571 psi | 71% | 2861 fps | 95.1% |
| Bofors RP15 | <<locked>> | 80% | 41,814 psi | 66% | 2828 fps | 97.7% |
| Bofors RP30 | <<locked>> | 82% | 38,116 psi | 60% | 2756 fps | 95.9% |
| Bofors RP5 | <<locked>> | 80% | 45,049 psi | 71% | 2900 fps | 98.6% |
| Hodgdon H1000 | <<locked>> | 80% | 35,824 psi | 56% | 2694 fps | 95.6% |
| Hodgdon H4831 | <<locked>> | 80% | 46,804 psi | 73% | 2894 fps | 97.5% |
| Hodgdon H4831 SC | <<locked>> | 80% | 45,977 psi | 72% | 2877 fps | 97.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 52,765 psi | 83% | 2943 fps | 100% |
| Hodgdon Retumbo | 77.5 gr | 80% | 37,072 psi | 58% | 2805 fps | 97.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,282 psi | 44% | 1850 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 47,659 psi | 75% | 2887 fps | 97.8% |
| IMR 7828 SSC | <<locked>> | 80% | 42,989 psi | 67% | 2874 fps | 97.1% |
| IMR 8133 Enduron | <<locked>> | 88% | 37,014 psi | 58% | 2740 fps | 95.3% |
| Lovex S071 | <<locked>> | 80% | 38,653 psi | 61% | 2694 fps | 99% |
| Norma 217 | <<locked>> | 84% | 32,416 psi | 51% | 2638 fps | 95.6% |
| Norma MRP | <<locked>> | 80% | 48,095 psi | 75% | 2976 fps | 99.8% |
| Ramshot Grand | <<locked>> | 80% | 43,424 psi | 68% | 2887 fps | 97.6% |
| Ramshot Magnum | <<locked>> | 80% | 39,291 psi | 62% | 2756 fps | 98.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,008 psi | 45% | 1896 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 36,695 psi | 57% | 2776 fps | 98.3% |
| ReloadSwiss RS 80 | 89.9 gr | 86% | 42,830 psi | 67% | 2874 fps | 96.1% |
| Rottweil R 904 | <<locked>> | 80% | 49,632 psi | 78% | 2933 fps | 98.6% |
| Rottweil R 905 | <<locked>> | 80% | 48,515 psi | 76% | 2940 fps | 99.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 48,182 psi | 76% | 2936 fps | 99.2% |
| Somchem S361 | <<locked>> | 80% | 50,923 psi | 80% | 2913 fps | 98.4% |
| Somchem S385 | <<locked>> | 80% | 48,965 psi | 77% | 2913 fps | 99.7% |
| Vihtavuori N165 | <<locked>> | 80% | 42,844 psi | 67% | 2782 fps | 98.6% |
| Vihtavuori N170 | <<locked>> | 90% | 52,112 psi | 82% | 2959 fps | 95% |
| Vihtavuori N555 | <<locked>> | 80% | 48,457 psi | 76% | 2923 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 47,645 psi | 75% | 2966 fps | 97.8% |
| Vihtavuori N565 | <<locked>> | 80% | 39,769 psi | 62% | 2776 fps | 95.7% |
| Vihtavuori N568 | <<locked>> | 86% | 43,613 psi | 68% | 2887 fps | 95.7% |
| Vihtavuori N570 | <<locked>> | 90% | 48,153 psi | 75% | 3015 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 80% | 42,670 psi | 67% | 2897 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 45,208 psi | 71% | 2838 fps | 98.7% |
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 50 powders for 7 mm Rem. Ultra Mag. loaded with the .284 | 133gr | MRR Green Hunting. Hodgdon Retumbo delivers the highest muzzle velocity at 3,209 fps; across all powders the maximum-charge window runs from 2,057 fps to 3,209 fps. Alliant Reloder-50 gives the best case fill at 100 %, and 50 of the 50 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 133.0 gr projectile in 0.284" calls for a 1:12.0 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. Hodgdon Retumbo, ADI AR 2218, ReloadSwiss RS 80 rank at the top here: for 7 mm Rem. Ultra Mag. with the .284 | 133gr | MRR Green Hunting 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.