Load Specifications
Load data in caliber 7 mm Rem. Ultra Mag. with .284 | 160gr | Barnes MRX BT bullet and 51 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 IMR 8133 Enduron.
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>> | 84% | 56,362 psi | 88% | 2805 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 53,534 psi | 84% | 2844 fps | 98.2% |
| Accurate MAGPRO | <<locked>> | 82% | 55,840 psi | 88% | 2913 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 82% | 57,537 psi | 90% | 2894 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 56,594 psi | 89% | 2913 fps | 100% |
| ADI AR 2217 | <<locked>> | 92% | 56,420 psi | 88% | 2897 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 57,667 psi | 90% | 3025 fps | 99.5% |
| ADI AR 2225 | <<locked>> | 94% | 56,463 psi | 88% | 2917 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 57,624 psi | 90% | 2890 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 57,624 psi | 90% | 2890 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 57,029 psi | 89% | 2884 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 57,043 psi | 89% | 2907 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 55,317 psi | 87% | 2812 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 56,463 psi | 88% | 2887 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 55,245 psi | 87% | 2927 fps | 98.8% |
| Alliant Reloder-50 | <<locked>> | 96% | 55,593 psi | 87% | 2920 fps | 98.5% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 56,855 psi | 89% | 2874 fps | 99.1% |
| Bofors RP15 | <<locked>> | 86% | 56,463 psi | 88% | 2894 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 56,159 psi | 88% | 2904 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 57,043 psi | 89% | 2907 fps | 100% |
| Hodgdon H1000 | <<locked>> | 88% | 53,780 psi | 84% | 2858 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 55,027 psi | 86% | 2844 fps | 99.8% |
| Hodgdon H4831 SC | <<locked>> | 82% | 53,867 psi | 84% | 2828 fps | 99.7% |
| Hodgdon Retumbo | <<locked>> | 88% | 56,304 psi | 88% | 2976 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,898 psi | 59% | 1900 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 55,085 psi | 86% | 2825 fps | 99.8% |
| IMR 7828 SSC | <<locked>> | 84% | 55,245 psi | 87% | 2897 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 90% | 57,551 psi | 90% | 2835 fps | 96.6% |
| IMR 8133 Enduron | <<locked>> | 96% | 55,172 psi | 86% | 2900 fps | 100% |
| Lovex S071 | <<locked>> | 88% | 54,984 psi | 86% | 2785 fps | 100% |
| Norma 217 | <<locked>> | 96% | 56,739 psi | 89% | 2920 fps | 100% |
| Norma MRP | <<locked>> | 82% | 57,246 psi | 90% | 2917 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 56,695 psi | 89% | 2917 fps | 100% |
| Ramshot Magnum | <<locked>> | 86% | 55,274 psi | 87% | 2844 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,885 psi | 61% | 1942 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 57,246 psi | 90% | 2956 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 56,202 psi | 88% | 2927 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 82% | 57,580 psi | 90% | 2864 fps | 100% |
| Rottweil R 905 | <<locked>> | 82% | 56,869 psi | 89% | 2877 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 55,027 psi | 86% | 2851 fps | 98.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 56,507 psi | 89% | 2871 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 56,927 psi | 89% | 2838 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 57,377 psi | 90% | 2831 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 57,072 psi | 89% | 2864 fps | 97.9% |
| Vihtavuori N555 | <<locked>> | 82% | 56,753 psi | 89% | 2838 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 56,507 psi | 89% | 2923 fps | 99.9% |
| Vihtavuori N565 | <<locked>> | 86% | 54,099 psi | 85% | 2861 fps | 99.9% |
| Vihtavuori N568 | <<locked>> | 90% | 56,449 psi | 88% | 2930 fps | 99.7% |
| Vihtavuori N570 | <<locked>> | 90% | 54,172 psi | 85% | 2933 fps | 98.3% |
| Winchester StaBALL HD | <<locked>> | 84% | 56,637 psi | 89% | 2894 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 57,014 psi | 89% | 2838 fps | 100% |
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% | 49,139 psi | 77% | 2700 fps | 100% |
| Accurate 8700 | <<locked>> | 94% | 42,424 psi | 66% | 2648 fps | 95.1% |
| Accurate MAGPRO | <<locked>> | 80% | 51,996 psi | 81% | 2851 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 80% | 53,708 psi | 84% | 2838 fps | 100% |
| ADI AR 2213 | <<locked>> | 80% | 48,965 psi | 77% | 2792 fps | 99.5% |
| ADI AR 2217 | <<locked>> | 80% | 36,332 psi | 57% | 2533 fps | 97.2% |
| ADI AR 2218 | 89.6 gr | 88% | 42,177 psi | 66% | 2730 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 80% | 33,692 psi | 53% | 2507 fps | 98.9% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 53,896 psi | 84% | 2835 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 53,896 psi | 84% | 2835 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 53,388 psi | 84% | 2828 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 49,603 psi | 78% | 2789 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 48,211 psi | 76% | 2713 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 42,525 psi | 67% | 2667 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 86% | 43,801 psi | 69% | 2720 fps | 96.1% |
| Alliant Reloder-50 | <<locked>> | 90% | 44,077 psi | 69% | 2713 fps | 95.6% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 46,412 psi | 73% | 2697 fps | 97.2% |
| Bofors RP15 | <<locked>> | 80% | 46,021 psi | 72% | 2726 fps | 99.6% |
| Bofors RP30 | <<locked>> | 80% | 39,508 psi | 62% | 2608 fps | 98.1% |
| Bofors RP5 | <<locked>> | 80% | 49,603 psi | 78% | 2789 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 80% | 39,769 psi | 62% | 2612 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 80% | 51,227 psi | 80% | 2785 fps | 99.5% |
| Hodgdon H4831 SC | <<locked>> | 80% | 50,299 psi | 79% | 2769 fps | 99.4% |
| Hodgdon Retumbo | <<locked>> | 80% | 41,655 psi | 65% | 2730 fps | 99.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,500 psi | 45% | 1706 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 51,605 psi | 81% | 2769 fps | 99.6% |
| IMR 7828 SSC | <<locked>> | 80% | 47,747 psi | 75% | 2776 fps | 99.4% |
| IMR 7977 Enduron | <<locked>> | 88% | 53,853 psi | 84% | 2776 fps | 95.8% |
| IMR 8133 Enduron | 76.7 gr | 82% | 33,504 psi | 53% | 2480 fps | 95.7% |
| Lovex S071 | <<locked>> | 80% | 42,105 psi | 66% | 2582 fps | 100% |
| Norma 217 | <<locked>> | 80% | 31,575 psi | 49% | 2441 fps | 97.1% |
| Norma MRP | <<locked>> | 80% | 53,258 psi | 83% | 2858 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 48,559 psi | 76% | 2792 fps | 99.7% |
| Ramshot Magnum | <<locked>> | 80% | 43,772 psi | 69% | 2661 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,283 psi | 46% | 1745 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 41,495 psi | 65% | 2703 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 38,072 psi | 60% | 2592 fps | 96.2% |
| Rottweil R 904 | <<locked>> | 80% | 53,867 psi | 84% | 2808 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 80% | 53,127 psi | 83% | 2822 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 94% | 44,353 psi | 70% | 2667 fps | 95.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 52,779 psi | 83% | 2815 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 53,301 psi | 84% | 2789 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 46,862 psi | 73% | 2674 fps | 99.9% |
| Vihtavuori N170 | <<locked>> | 84% | 46,253 psi | 72% | 2680 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 80% | 53,040 psi | 83% | 2785 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 52,591 psi | 82% | 2861 fps | 99.7% |
| Vihtavuori N565 | <<locked>> | 80% | 43,888 psi | 69% | 2680 fps | 98.6% |
| Vihtavuori N568 | <<locked>> | 80% | 38,957 psi | 61% | 2608 fps | 95.9% |
| Vihtavuori N570 | 83.8 gr | 84% | 43,236 psi | 68% | 2733 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 48,646 psi | 76% | 2785 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 49,487 psi | 78% | 2726 fps | 99.9% |
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 51 powders for 7 mm Rem. Ultra Mag. loaded with the .284 | 160gr | Barnes MRX BT. ADI AR 2218 delivers the highest muzzle velocity at 3,025 fps; across all powders the maximum-charge window runs from 1,900 fps to 3,025 fps. Accurate 8700 gives the best case fill at 100 %, and 51 of the 51 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 160.0 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, IMR 8133 Enduron rank at the top here: for 7 mm Rem. Ultra Mag. with the .284 | 160gr | Barnes MRX BT 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.