Load Specifications
Load data in caliber 7 mm Rem. Ultra Mag. with .284 | 140gr | Sierra Pro-Hunter bullet and 50 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ADI AR 2218, Vihtavuori N570 and Hodgdon Retumbo.
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% | 57,653 psi | 90% | 2966 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 49,937 psi | 78% | 2907 fps | 96.2% |
| Accurate MAGPRO | <<locked>> | 84% | 56,884 psi | 89% | 3068 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 82% | 54,592 psi | 86% | 2995 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 86% | 57,363 psi | 90% | 3071 fps | 99.8% |
| ADI AR 2217 | <<locked>> | 94% | 56,971 psi | 89% | 3048 fps | 99.9% |
| ADI AR 2218 | <<locked>> | 96% | 53,867 psi | 84% | 3091 fps | 97.9% |
| ADI AR 2225 | <<locked>> | 96% | 56,565 psi | 89% | 3064 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 54,259 psi | 85% | 2986 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 84% | 54,172 psi | 85% | 3005 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 86% | 56,043 psi | 88% | 2972 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 56,884 psi | 89% | 3041 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 57,014 psi | 89% | 3054 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 55,970 psi | 88% | 3071 fps | 98.1% |
| Alliant Reloder-50 | <<locked>> | 98% | 56,289 psi | 88% | 3061 fps | 97.7% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 54,215 psi | 85% | 2966 fps | 97.9% |
| Bofors RP15 | <<locked>> | 88% | 57,276 psi | 90% | 3051 fps | 100% |
| Bofors RP30 | <<locked>> | 92% | 56,855 psi | 89% | 3058 fps | 99.9% |
| Bofors RP5 | <<locked>> | 84% | 54,172 psi | 85% | 3005 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 90% | 54,360 psi | 85% | 3009 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 84% | 56,057 psi | 88% | 3002 fps | 99.4% |
| Hodgdon H4831 SC | <<locked>> | 84% | 55,071 psi | 86% | 2982 fps | 99.3% |
| Hodgdon Retumbo | <<locked>> | 90% | 56,492 psi | 89% | 3133 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,826 psi | 59% | 2014 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 56,086 psi | 88% | 2979 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 86% | 55,941 psi | 88% | 3051 fps | 99.7% |
| IMR 8133 Enduron | <<locked>> | 98% | 55,593 psi | 87% | 3048 fps | 99.9% |
| Lovex S071 | <<locked>> | 90% | 56,043 psi | 88% | 2943 fps | 100% |
| Norma 217 | <<locked>> | 98% | 57,014 psi | 89% | 3071 fps | 100% |
| Norma MRP | <<locked>> | 82% | 54,186 psi | 85% | 3018 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 57,377 psi | 90% | 3074 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 88% | 56,188 psi | 88% | 2999 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,754 psi | 61% | 2060 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 57,740 psi | 90% | 3114 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 57,101 psi | 89% | 3077 fps | 99.5% |
| Rottweil R 904 | <<locked>> | 82% | 54,940 psi | 86% | 2966 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 82% | 54,041 psi | 85% | 2979 fps | 99.9% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 51,866 psi | 81% | 2923 fps | 96.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 57,595 psi | 90% | 3035 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 56,463 psi | 88% | 2949 fps | 99.5% |
| Somchem S385 | <<locked>> | 82% | 54,491 psi | 85% | 2949 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 54,650 psi | 86% | 2933 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 54,331 psi | 85% | 2946 fps | 96.2% |
| Vihtavuori N555 | <<locked>> | 84% | 57,740 psi | 90% | 3002 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 57,421 psi | 90% | 3081 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 88% | 55,143 psi | 86% | 3015 fps | 99.5% |
| Vihtavuori N568 | <<locked>> | 92% | 57,261 psi | 90% | 3084 fps | 99.2% |
| Vihtavuori N570 | <<locked>> | 92% | 54,636 psi | 86% | 3077 fps | 97.4% |
| Winchester StaBALL HD | <<locked>> | 86% | 57,029 psi | 89% | 3058 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 54,273 psi | 85% | 2940 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% | 46,963 psi | 74% | 2802 fps | 100% |
| Accurate 8700 | <<locked>> | 98% | 46,311 psi | 73% | 2841 fps | 95.1% |
| Accurate MAGPRO | <<locked>> | 80% | 49,240 psi | 77% | 2936 fps | 98% |
| ADI AR 2209 | <<locked>> | 80% | 51,024 psi | 80% | 2936 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 80% | 46,238 psi | 72% | 2877 fps | 98.3% |
| ADI AR 2217 | <<locked>> | 82% | 37,072 psi | 58% | 2674 fps | 96.1% |
| ADI AR 2218 | 95.1 gr | 92% | 46,325 psi | 73% | 2940 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 80% | 31,865 psi | 50% | 2572 fps | 97% |
| Alliant Reloder-19 | <<locked>> | 80% | 50,807 psi | 80% | 2927 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 80% | 47,021 psi | 74% | 2884 fps | 99.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 45,745 psi | 72% | 2818 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 39,987 psi | 63% | 2759 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 52,808 psi | 83% | 2992 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 47,964 psi | 75% | 2930 fps | 96.1% |
| Alliant Reloder-50 | <<locked>> | 94% | 48,254 psi | 76% | 2920 fps | 95.6% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 44,237 psi | 69% | 2782 fps | 95.2% |
| Bofors RP15 | <<locked>> | 80% | 43,845 psi | 69% | 2818 fps | 98.6% |
| Bofors RP30 | <<locked>> | 80% | 37,333 psi | 59% | 2687 fps | 96.2% |
| Bofors RP5 | <<locked>> | 80% | 47,021 psi | 74% | 2884 fps | 99.3% |
| Hodgdon H1000 | <<locked>> | 80% | 37,666 psi | 59% | 2690 fps | 97% |
| Hodgdon H4831 | <<locked>> | 80% | 48,849 psi | 77% | 2877 fps | 98.3% |
| Hodgdon H4831 SC | <<locked>> | 80% | 47,805 psi | 75% | 2861 fps | 98.2% |
| Hodgdon Retumbo | 78 gr | 80% | 39,001 psi | 61% | 2802 fps | 98.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,297 psi | 44% | 1811 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 49,356 psi | 77% | 2867 fps | 98.6% |
| IMR 7828 SSC | <<locked>> | 80% | 45,020 psi | 71% | 2861 fps | 98.1% |
| IMR 8133 Enduron | <<locked>> | 86% | 36,463 psi | 57% | 2674 fps | 95.6% |
| Lovex S071 | <<locked>> | 80% | 40,408 psi | 63% | 2677 fps | 99.5% |
| Norma 217 | <<locked>> | 82% | 31,923 psi | 50% | 2575 fps | 95.9% |
| Norma MRP | <<locked>> | 80% | 50,459 psi | 79% | 2959 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 45,658 psi | 72% | 2874 fps | 98.5% |
| Ramshot Magnum | <<locked>> | 80% | 41,307 psi | 65% | 2746 fps | 98.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,196 psi | 46% | 1857 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 38,798 psi | 61% | 2776 fps | 99.2% |
| ReloadSwiss RS 80 | <<locked>> | 82% | 38,725 psi | 61% | 2730 fps | 95% |
| Rottweil R 904 | <<locked>> | 80% | 51,445 psi | 81% | 2910 fps | 99.2% |
| Rottweil R 905 | <<locked>> | 80% | 50,517 psi | 79% | 2920 fps | 99.7% |
| SNPE Vectan SP 13 | <<locked>> | 98% | 48,254 psi | 76% | 2858 fps | 95.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 50,169 psi | 79% | 2917 fps | 99.6% |
| Somchem S361 | <<locked>> | 80% | 52,881 psi | 83% | 2894 fps | 99% |
| Somchem S385 | <<locked>> | 80% | 50,865 psi | 80% | 2890 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 80% | 44,657 psi | 70% | 2766 fps | 99.3% |
| Vihtavuori N170 | <<locked>> | 88% | 50,749 psi | 80% | 2884 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 80% | 50,560 psi | 79% | 2897 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 49,893 psi | 78% | 2953 fps | 98.6% |
| Vihtavuori N565 | <<locked>> | 80% | 41,640 psi | 65% | 2762 fps | 96.9% |
| Vihtavuori N568 | <<locked>> | 84% | 42,743 psi | 67% | 2818 fps | 95.9% |
| Vihtavuori N570 | 89.1 gr | 88% | 47,181 psi | 74% | 2940 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 80% | 45,208 psi | 71% | 2877 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 47,224 psi | 74% | 2822 fps | 99.3% |
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 Pro-Hunter. Hodgdon Retumbo delivers the highest muzzle velocity at 3,133 fps; across all powders the maximum-charge window runs from 2,014 fps to 3,133 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 1:12.5 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. ADI AR 2218, Vihtavuori N570, Hodgdon Retumbo rank at the top here: for 7 mm Rem. Ultra Mag. with the .284 | 140gr | Sierra Pro-Hunter they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Hodgdon US 869, 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.