Load Specifications
Load data in caliber 7 mm Rem. Ultra Mag. with .284 | 130gr | Sierra HPBT MatchKing bullet and 50 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N570, 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% | 54,723 psi | 86% | 3009 fps | 100% |
| Accurate MAGPRO | <<locked>> | 84% | 53,780 psi | 84% | 3097 fps | 98.4% |
| ADI AR 2209 | <<locked>> | 84% | 55,535 psi | 87% | 3097 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 86% | 54,259 psi | 85% | 3100 fps | 99.2% |
| ADI AR 2217 | <<locked>> | 96% | 57,609 psi | 90% | 3140 fps | 99.8% |
| ADI AR 2218 | <<locked>> | 98% | 54,563 psi | 86% | 3173 fps | 97.4% |
| ADI AR 2225 | <<locked>> | 98% | 56,826 psi | 89% | 3156 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 55,898 psi | 88% | 3094 fps | 99.8% |
| Alliant Reloder-19 | <<locked>> | 84% | 55,317 psi | 87% | 3084 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 86% | 54,868 psi | 86% | 3100 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 88% | 56,753 psi | 89% | 3071 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 57,421 psi | 90% | 3136 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 53,548 psi | 84% | 3091 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 56,420 psi | 88% | 3156 fps | 97.6% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 56,637 psi | 89% | 3143 fps | 97.2% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 55,216 psi | 87% | 3058 fps | 97.5% |
| Bofors RP15 | <<locked>> | 88% | 54,302 psi | 85% | 3087 fps | 99.7% |
| Bofors RP30 | <<locked>> | 94% | 57,363 psi | 90% | 3150 fps | 99.8% |
| Bofors RP5 | <<locked>> | 86% | 54,868 psi | 86% | 3100 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 92% | 54,984 psi | 86% | 3100 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 86% | 57,232 psi | 90% | 3097 fps | 99.2% |
| Hodgdon H4831 SC | <<locked>> | 86% | 56,014 psi | 88% | 3081 fps | 99% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 55,796 psi | 87% | 3012 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 56,681 psi | 89% | 3222 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,666 psi | 59% | 2077 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 57,595 psi | 90% | 3074 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 57,348 psi | 90% | 3077 fps | 99.3% |
| IMR 7828 SSC | <<locked>> | 88% | 56,637 psi | 89% | 3146 fps | 99.5% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 55,738 psi | 87% | 3130 fps | 99.6% |
| Lovex S071 | <<locked>> | 92% | 56,681 psi | 89% | 3035 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 57,232 psi | 90% | 3156 fps | 100% |
| Norma MRP | <<locked>> | 84% | 54,969 psi | 86% | 3114 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 53,925 psi | 85% | 3100 fps | 99.4% |
| Ramshot Magnum | <<locked>> | 90% | 56,985 psi | 89% | 3094 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,580 psi | 60% | 2123 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 53,809 psi | 84% | 3143 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 53,490 psi | 84% | 3100 fps | 98.6% |
| Rottweil R 904 | <<locked>> | 84% | 55,985 psi | 88% | 3064 fps | 99.4% |
| Rottweil R 905 | <<locked>> | 84% | 55,071 psi | 86% | 3077 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 54,694 psi | 86% | 3071 fps | 99.8% |
| Somchem S361 | <<locked>> | 82% | 53,969 psi | 85% | 2989 fps | 98.8% |
| Somchem S385 | <<locked>> | 84% | 55,492 psi | 87% | 3045 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 55,709 psi | 87% | 3031 fps | 100% |
| Vihtavuori N555 | <<locked>> | 84% | 54,723 psi | 86% | 3048 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 54,346 psi | 85% | 3114 fps | 98.9% |
| Vihtavuori N565 | <<locked>> | 90% | 55,680 psi | 87% | 3104 fps | 99.3% |
| Vihtavuori N568 | <<locked>> | 92% | 53,853 psi | 84% | 3104 fps | 98.2% |
| Vihtavuori N570 | <<locked>> | 94% | 55,114 psi | 86% | 3163 fps | 96.8% |
| Winchester StaBALL HD | <<locked>> | 88% | 57,450 psi | 90% | 3153 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 55,390 psi | 87% | 3038 fps | 99.8% |
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% | 44,425 psi | 70% | 2835 fps | 99.7% |
| Accurate MAGPRO | <<locked>> | 80% | 46,441 psi | 73% | 2959 fps | 96.7% |
| ADI AR 2209 | <<locked>> | 80% | 48,457 psi | 76% | 2972 fps | 99% |
| ADI AR 2213 | <<locked>> | 80% | 43,801 psi | 69% | 2907 fps | 97.1% |
| ADI AR 2217 | <<locked>> | 84% | 37,478 psi | 59% | 2753 fps | 95.4% |
| ADI AR 2218 | <<locked>> | 96% | 50,473 psi | 79% | 3094 fps | 96.2% |
| ADI AR 2225 | <<locked>> | 82% | 32,140 psi | 50% | 2648 fps | 96.2% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 48,791 psi | 76% | 2972 fps | 99.1% |
| Alliant Reloder-19 | <<locked>> | 80% | 48,327 psi | 76% | 2963 fps | 99% |
| Alliant Reloder-22 | <<locked>> | 80% | 44,585 psi | 70% | 2913 fps | 98.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 43,105 psi | 68% | 2854 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 37,463 psi | 59% | 2782 fps | 99.3% |
| Alliant Reloder-26 | <<locked>> | 80% | 49,545 psi | 78% | 3028 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 48,457 psi | 76% | 3012 fps | 95.5% |
| Alliant Reloder-50 | <<locked>> | 98% | 52,359 psi | 82% | 3068 fps | 96.1% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 48,254 psi | 76% | 2933 fps | 95.7% |
| Bofors RP15 | <<locked>> | 80% | 41,394 psi | 65% | 2844 fps | 97.4% |
| Bofors RP30 | <<locked>> | 82% | 37,695 psi | 59% | 2769 fps | 95.5% |
| Bofors RP5 | <<locked>> | 80% | 44,585 psi | 70% | 2913 fps | 98.4% |
| Hodgdon H1000 | <<locked>> | 80% | 35,491 psi | 56% | 2707 fps | 95.1% |
| Hodgdon H4831 | <<locked>> | 80% | 46,369 psi | 73% | 2907 fps | 97.2% |
| Hodgdon H4831 SC | <<locked>> | 80% | 45,542 psi | 71% | 2894 fps | 97% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 52,127 psi | 82% | 2959 fps | 100% |
| Hodgdon Retumbo | 77.7 gr | 80% | 36,492 psi | 57% | 2815 fps | 96.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,268 psi | 44% | 1873 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 53,998 psi | 85% | 3018 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 80% | 47,108 psi | 74% | 2900 fps | 97.5% |
| IMR 7828 SSC | <<locked>> | 80% | 42,511 psi | 67% | 2887 fps | 96.7% |
| IMR 8133 Enduron | <<locked>> | 90% | 39,233 psi | 61% | 2815 fps | 96% |
| Lovex S071 | <<locked>> | 80% | 38,130 psi | 60% | 2707 fps | 98.7% |
| Norma 217 | <<locked>> | 84% | 31,850 psi | 50% | 2644 fps | 95% |
| Norma MRP | <<locked>> | 80% | 47,558 psi | 75% | 2986 fps | 99.7% |
| Ramshot Grand | <<locked>> | 80% | 42,728 psi | 67% | 2897 fps | 97.2% |
| Ramshot Magnum | <<locked>> | 80% | 38,653 psi | 61% | 2766 fps | 97.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,993 psi | 45% | 1916 fps | 100% |
| ReloadSwiss RS 76 | 83.2 gr | 80% | 36,201 psi | 57% | 2785 fps | 97.9% |
| ReloadSwiss RS 80 | <<locked>> | 86% | 42,206 psi | 66% | 2881 fps | 95.6% |
| Rottweil R 904 | <<locked>> | 80% | 49,066 psi | 77% | 2946 fps | 98.4% |
| Rottweil R 905 | <<locked>> | 80% | 47,921 psi | 75% | 2953 fps | 99% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 47,572 psi | 75% | 2949 fps | 99% |
| Somchem S361 | <<locked>> | 80% | 50,488 psi | 79% | 2930 fps | 98.2% |
| Somchem S385 | <<locked>> | 80% | 48,530 psi | 76% | 2930 fps | 99.5% |
| Vihtavuori N165 | <<locked>> | 80% | 42,308 psi | 66% | 2795 fps | 98.4% |
| Vihtavuori N555 | <<locked>> | 80% | 47,819 psi | 75% | 2936 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 47,123 psi | 74% | 2979 fps | 97.5% |
| Vihtavuori N565 | <<locked>> | 80% | 39,160 psi | 61% | 2782 fps | 95.2% |
| Vihtavuori N568 | <<locked>> | 86% | 43,047 psi | 67% | 2897 fps | 95.2% |
| Vihtavuori N570 | 92.8 gr | 92% | 51,169 psi | 80% | 3094 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 41,858 psi | 66% | 2907 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 44,802 psi | 70% | 2854 fps | 98.4% |
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 | 130gr | Sierra HPBT MatchKing. Hodgdon Retumbo delivers the highest muzzle velocity at 3,222 fps; across all powders the maximum-charge window runs from 2,077 fps to 3,222 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 130.0 gr projectile in 0.284" calls for a 1:11.5 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 | 130gr | Sierra HPBT MatchKing 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.