Load Specifications
Load data in caliber 7 mm Rem. Ultra Mag. with .284 | 140gr | Sierra SBT GameKing bullet and 52 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% | 57,682 psi | 90% | 2969 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 49,995 psi | 78% | 2910 fps | 96.2% |
| Accurate MAGPRO | <<locked>> | 84% | 56,927 psi | 89% | 3071 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 82% | 54,636 psi | 86% | 2999 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 86% | 57,392 psi | 90% | 3071 fps | 99.8% |
| ADI AR 2217 | <<locked>> | 94% | 56,985 psi | 89% | 3048 fps | 99.9% |
| ADI AR 2218 | <<locked>> | 96% | 53,940 psi | 85% | 3094 fps | 98% |
| ADI AR 2225 | <<locked>> | 96% | 56,623 psi | 89% | 3068 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 54,839 psi | 86% | 2995 fps | 99.9% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 54,839 psi | 86% | 2995 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 82% | 54,288 psi | 85% | 2989 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 84% | 53,983 psi | 85% | 3005 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 86% | 56,086 psi | 88% | 2972 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 56,956 psi | 89% | 3045 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 57,043 psi | 89% | 3058 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 55,999 psi | 88% | 3071 fps | 98.1% |
| Alliant Reloder-50 | <<locked>> | 98% | 56,318 psi | 88% | 3064 fps | 97.7% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 54,070 psi | 85% | 2963 fps | 97.8% |
| Bofors RP15 | <<locked>> | 88% | 57,290 psi | 90% | 3054 fps | 100% |
| Bofors RP30 | <<locked>> | 92% | 56,884 psi | 89% | 3061 fps | 99.9% |
| Bofors RP5 | <<locked>> | 84% | 53,983 psi | 85% | 3005 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 90% | 54,215 psi | 85% | 3009 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 84% | 56,072 psi | 88% | 3002 fps | 99.4% |
| Hodgdon H4831 SC | <<locked>> | 84% | 54,911 psi | 86% | 2982 fps | 99.3% |
| Hodgdon Retumbo | <<locked>> | 90% | 56,289 psi | 88% | 3130 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,840 psi | 59% | 2014 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 56,130 psi | 88% | 2982 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 86% | 55,956 psi | 88% | 3054 fps | 99.7% |
| IMR 8133 Enduron | <<locked>> | 98% | 55,622 psi | 87% | 3048 fps | 99.9% |
| Lovex S071 | <<locked>> | 90% | 55,883 psi | 88% | 2943 fps | 100% |
| Norma 217 | <<locked>> | 98% | 57,072 psi | 89% | 3071 fps | 100% |
| Norma MRP | <<locked>> | 82% | 54,259 psi | 85% | 3022 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 57,450 psi | 90% | 3077 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 88% | 56,202 psi | 88% | 3002 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,783 psi | 61% | 2060 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 53,301 psi | 84% | 3048 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 57,130 psi | 90% | 3081 fps | 99.5% |
| Rottweil R 904 | <<locked>> | 82% | 54,984 psi | 86% | 2969 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 82% | 54,085 psi | 85% | 2979 fps | 99.9% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 51,895 psi | 81% | 2927 fps | 96.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 57,435 psi | 90% | 3035 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 56,536 psi | 89% | 2953 fps | 99.5% |
| Somchem S385 | <<locked>> | 82% | 54,505 psi | 85% | 2949 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 54,679 psi | 86% | 2936 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 54,389 psi | 85% | 2949 fps | 96.2% |
| Vihtavuori N555 | <<locked>> | 82% | 54,085 psi | 85% | 2953 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 57,464 psi | 90% | 3081 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 88% | 54,998 psi | 86% | 3015 fps | 99.5% |
| Vihtavuori N568 | <<locked>> | 92% | 57,305 psi | 90% | 3084 fps | 99.2% |
| Vihtavuori N570 | <<locked>> | 92% | 54,665 psi | 86% | 3081 fps | 97.4% |
| Winchester StaBALL HD | <<locked>> | 86% | 57,130 psi | 90% | 3058 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 54,302 psi | 85% | 2943 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% | 46,978 psi | 74% | 2805 fps | 100% |
| Accurate 8700 | <<locked>> | 98% | 46,340 psi | 73% | 2844 fps | 95.1% |
| Accurate MAGPRO | <<locked>> | 80% | 49,298 psi | 77% | 2940 fps | 98.1% |
| ADI AR 2209 | <<locked>> | 80% | 50,879 psi | 80% | 2936 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 80% | 46,267 psi | 73% | 2881 fps | 98.3% |
| ADI AR 2217 | <<locked>> | 82% | 36,956 psi | 58% | 2671 fps | 96.1% |
| ADI AR 2218 | 95 gr | 92% | 46,195 psi | 72% | 2940 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 80% | 31,879 psi | 50% | 2575 fps | 97% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 51,343 psi | 80% | 2936 fps | 99.7% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 51,343 psi | 80% | 2936 fps | 99.7% |
| Alliant Reloder-19 | <<locked>> | 80% | 50,865 psi | 80% | 2930 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 80% | 47,050 psi | 74% | 2884 fps | 99.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 45,788 psi | 72% | 2818 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 39,856 psi | 62% | 2756 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 52,852 psi | 83% | 2995 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 48,008 psi | 75% | 2933 fps | 96.1% |
| Alliant Reloder-50 | <<locked>> | 94% | 48,298 psi | 76% | 2920 fps | 95.6% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 44,266 psi | 69% | 2785 fps | 95.3% |
| Bofors RP15 | <<locked>> | 80% | 43,714 psi | 69% | 2818 fps | 98.6% |
| Bofors RP30 | <<locked>> | 80% | 37,362 psi | 59% | 2690 fps | 96.2% |
| Bofors RP5 | <<locked>> | 80% | 47,050 psi | 74% | 2884 fps | 99.3% |
| Hodgdon H1000 | <<locked>> | 80% | 37,550 psi | 59% | 2687 fps | 96.9% |
| Hodgdon H4831 | <<locked>> | 80% | 48,718 psi | 76% | 2877 fps | 98.3% |
| Hodgdon H4831 SC | <<locked>> | 80% | 47,863 psi | 75% | 2864 fps | 98.2% |
| Hodgdon Retumbo | 78 gr | 80% | 39,030 psi | 61% | 2805 fps | 98.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,311 psi | 44% | 1811 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 49,211 psi | 77% | 2864 fps | 98.6% |
| IMR 7828 SSC | <<locked>> | 80% | 45,049 psi | 71% | 2861 fps | 98.1% |
| IMR 8133 Enduron | <<locked>> | 86% | 36,492 psi | 57% | 2677 fps | 95.7% |
| Lovex S071 | <<locked>> | 80% | 40,422 psi | 63% | 2680 fps | 99.5% |
| Norma 217 | <<locked>> | 82% | 31,952 psi | 50% | 2579 fps | 96% |
| Norma MRP | <<locked>> | 80% | 50,314 psi | 79% | 2956 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 45,716 psi | 72% | 2877 fps | 98.6% |
| Ramshot Magnum | <<locked>> | 80% | 41,321 psi | 65% | 2746 fps | 98.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,066 psi | 46% | 1854 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 38,841 psi | 61% | 2779 fps | 99.3% |
| ReloadSwiss RS 80 | <<locked>> | 82% | 38,740 psi | 61% | 2730 fps | 95% |
| Rottweil R 904 | <<locked>> | 80% | 51,503 psi | 81% | 2910 fps | 99.2% |
| Rottweil R 905 | <<locked>> | 80% | 50,560 psi | 79% | 2920 fps | 99.7% |
| SNPE Vectan SP 13 | <<locked>> | 98% | 48,312 psi | 76% | 2861 fps | 95.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 50,212 psi | 79% | 2920 fps | 99.7% |
| Somchem S361 | <<locked>> | 80% | 52,750 psi | 83% | 2894 fps | 99% |
| Somchem S385 | <<locked>> | 80% | 50,879 psi | 80% | 2890 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 80% | 44,672 psi | 70% | 2766 fps | 99.3% |
| Vihtavuori N170 | <<locked>> | 88% | 50,618 psi | 79% | 2884 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 80% | 50,575 psi | 79% | 2900 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 49,763 psi | 78% | 2953 fps | 98.6% |
| Vihtavuori N565 | <<locked>> | 80% | 41,684 psi | 65% | 2766 fps | 96.9% |
| Vihtavuori N568 | <<locked>> | 84% | 42,612 psi | 67% | 2815 fps | 95.9% |
| Vihtavuori N570 | 89 gr | 88% | 47,050 psi | 74% | 2940 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 80% | 45,237 psi | 71% | 2881 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 47,094 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 52 powders for 7 mm Rem. Ultra Mag. loaded with the .284 | 140gr | Sierra SBT GameKing. Hodgdon Retumbo delivers the highest muzzle velocity at 3,130 fps; across all powders the maximum-charge window runs from 2,014 fps to 3,130 fps. Accurate 8700 gives the best case fill at 100 %, and 52 of the 52 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 1:12.0 twist; slower twists will usually not stabilise this weight. Accurate 8700, Hodgdon TrailBoss, ReloadSwiss RS 14 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 SBT GameKing 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.