Load Specifications
Load data in caliber 7 mm Rem. Ultra Mag. with .284 | 142gr | Lehigh Defense Controlled Chaos 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 Vihtavuori N570.
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% | 55,912 psi | 88% | 2930 fps | 100% |
| Accurate MAGPRO | <<locked>> | 84% | 55,027 psi | 86% | 3028 fps | 99% |
| ADI AR 2209 | <<locked>> | 84% | 56,768 psi | 89% | 3018 fps | 100% |
| ADI AR 2213 | <<locked>> | 86% | 55,593 psi | 87% | 3031 fps | 99.7% |
| ADI AR 2217 | <<locked>> | 94% | 54,940 psi | 86% | 3005 fps | 99.8% |
| ADI AR 2218 | <<locked>> | 98% | 55,753 psi | 87% | 3114 fps | 98.3% |
| ADI AR 2225 | <<locked>> | 96% | 54,346 psi | 85% | 3028 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 57,116 psi | 90% | 3015 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 56,521 psi | 89% | 3009 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 86% | 56,115 psi | 88% | 3025 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 86% | 54,375 psi | 85% | 2940 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 54,926 psi | 86% | 3005 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 54,897 psi | 86% | 3015 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 53,664 psi | 84% | 3025 fps | 97.6% |
| Alliant Reloder-50 | <<locked>> | 98% | 53,664 psi | 84% | 3012 fps | 97.1% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 56,246 psi | 88% | 2986 fps | 98.2% |
| Bofors RP15 | <<locked>> | 88% | 55,550 psi | 87% | 3015 fps | 99.9% |
| Bofors RP30 | <<locked>> | 92% | 54,839 psi | 86% | 3018 fps | 99.8% |
| Bofors RP5 | <<locked>> | 86% | 56,115 psi | 88% | 3025 fps | 100% |
| Hodgdon H1000 | <<locked>> | 92% | 56,362 psi | 88% | 3028 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 54,418 psi | 85% | 2963 fps | 99.2% |
| Hodgdon H4831 SC | <<locked>> | 86% | 57,246 psi | 90% | 3005 fps | 99.5% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 56,985 psi | 89% | 2927 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 54,099 psi | 85% | 3087 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,797 psi | 59% | 1995 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 54,679 psi | 86% | 2943 fps | 99.3% |
| IMR 7828 SSC | <<locked>> | 86% | 54,143 psi | 85% | 3015 fps | 99.6% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 57,232 psi | 90% | 3064 fps | 99.9% |
| Lovex S071 | <<locked>> | 90% | 54,288 psi | 85% | 2907 fps | 100% |
| Norma 217 | <<locked>> | 98% | 54,737 psi | 86% | 3028 fps | 100% |
| Norma MRP | <<locked>> | 84% | 56,362 psi | 88% | 3041 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 55,317 psi | 87% | 3031 fps | 99.8% |
| Ramshot Magnum | <<locked>> | 88% | 54,157 psi | 85% | 2959 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,754 psi | 61% | 2037 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 55,361 psi | 87% | 3074 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 54,650 psi | 86% | 3031 fps | 99.2% |
| Rottweil R 904 | <<locked>> | 84% | 57,087 psi | 89% | 2986 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 84% | 56,347 psi | 88% | 3002 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 55,956 psi | 88% | 2995 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 55,071 psi | 86% | 2917 fps | 99.3% |
| Somchem S385 | <<locked>> | 84% | 56,594 psi | 89% | 2966 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 56,768 psi | 89% | 2953 fps | 100% |
| Vihtavuori N170 | <<locked>> | 92% | 56,391 psi | 88% | 2969 fps | 96.6% |
| Vihtavuori N555 | <<locked>> | 84% | 55,985 psi | 88% | 2966 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 55,695 psi | 87% | 3045 fps | 99.4% |
| Vihtavuori N565 | <<locked>> | 90% | 57,145 psi | 90% | 3035 fps | 99.7% |
| Vihtavuori N568 | <<locked>> | 92% | 55,172 psi | 86% | 3041 fps | 98.9% |
| Vihtavuori N570 | <<locked>> | 94% | 56,420 psi | 88% | 3100 fps | 97.7% |
| Winchester StaBALL HD | <<locked>> | 86% | 54,955 psi | 86% | 3022 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 56,666 psi | 89% | 2963 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% | 45,556 psi | 71% | 2769 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 47,558 psi | 75% | 2897 fps | 97.6% |
| ADI AR 2209 | <<locked>> | 80% | 49,574 psi | 78% | 2900 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 80% | 44,817 psi | 70% | 2841 fps | 98% |
| ADI AR 2217 | <<locked>> | 82% | 35,766 psi | 56% | 2631 fps | 95.5% |
| ADI AR 2218 | 93.8 gr | 94% | 48,051 psi | 75% | 2969 fps | 96.2% |
| ADI AR 2225 | <<locked>> | 80% | 30,777 psi | 48% | 2536 fps | 96.4% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 49,864 psi | 78% | 2900 fps | 99.5% |
| Alliant Reloder-19 | <<locked>> | 80% | 49,443 psi | 77% | 2894 fps | 99.5% |
| Alliant Reloder-22 | <<locked>> | 80% | 45,614 psi | 71% | 2844 fps | 99.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 44,382 psi | 70% | 2785 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 38,551 psi | 60% | 2723 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 50,894 psi | 80% | 2956 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 45,948 psi | 72% | 2884 fps | 95.4% |
| Alliant Reloder-50 | <<locked>> | 96% | 49,777 psi | 78% | 2943 fps | 96.1% |
| Baschieri & Pellagri 109 | <<locked>> | 82% | 46,122 psi | 72% | 2808 fps | 95.8% |
| Bofors RP15 | <<locked>> | 80% | 42,424 psi | 66% | 2779 fps | 98.3% |
| Bofors RP30 | <<locked>> | 80% | 36,027 psi | 56% | 2648 fps | 95.6% |
| Bofors RP5 | <<locked>> | 80% | 45,614 psi | 71% | 2844 fps | 99.1% |
| Hodgdon H1000 | <<locked>> | 80% | 36,303 psi | 57% | 2648 fps | 96.4% |
| Hodgdon H4831 | <<locked>> | 80% | 47,369 psi | 74% | 2838 fps | 98% |
| Hodgdon H4831 SC | <<locked>> | 80% | 46,499 psi | 73% | 2825 fps | 97.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 53,388 psi | 84% | 2881 fps | 100% |
| Hodgdon Retumbo | 75.3 gr | 80% | 37,623 psi | 59% | 2762 fps | 98% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,253 psi | 44% | 1788 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 48,066 psi | 75% | 2831 fps | 98.3% |
| IMR 7828 SSC | <<locked>> | 80% | 43,555 psi | 68% | 2822 fps | 97.7% |
| IMR 8133 Enduron | <<locked>> | 86% | 35,070 psi | 55% | 2635 fps | 95.1% |
| Lovex S071 | <<locked>> | 80% | 39,117 psi | 61% | 2644 fps | 99.4% |
| Norma 217 | <<locked>> | 82% | 30,632 psi | 48% | 2536 fps | 95.3% |
| Norma MRP | <<locked>> | 80% | 48,820 psi | 77% | 2920 fps | 99.9% |
| Ramshot Grand | <<locked>> | 80% | 43,990 psi | 69% | 2835 fps | 98.2% |
| Ramshot Magnum | <<locked>> | 80% | 39,842 psi | 62% | 2710 fps | 98.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,008 psi | 45% | 1831 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 37,275 psi | 58% | 2736 fps | 98.9% |
| ReloadSwiss RS 80 | <<locked>> | 84% | 40,089 psi | 63% | 2756 fps | 95.6% |
| Rottweil R 904 | <<locked>> | 80% | 50,227 psi | 79% | 2874 fps | 99% |
| Rottweil R 905 | <<locked>> | 80% | 49,037 psi | 77% | 2884 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 48,689 psi | 76% | 2877 fps | 99.5% |
| Somchem S361 | <<locked>> | 80% | 51,430 psi | 81% | 2858 fps | 98.8% |
| Somchem S385 | <<locked>> | 80% | 49,516 psi | 78% | 2854 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 80% | 43,337 psi | 68% | 2730 fps | 99% |
| Vihtavuori N170 | <<locked>> | 90% | 52,562 psi | 82% | 2907 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 80% | 48,950 psi | 77% | 2861 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 48,341 psi | 76% | 2913 fps | 98.3% |
| Vihtavuori N565 | <<locked>> | 80% | 40,205 psi | 63% | 2726 fps | 96.4% |
| Vihtavuori N568 | <<locked>> | 84% | 41,075 psi | 64% | 2776 fps | 95.4% |
| Vihtavuori N570 | 87.9 gr | 90% | 48,689 psi | 76% | 2963 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 43,482 psi | 68% | 2844 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 45,774 psi | 72% | 2785 fps | 99.1% |
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 | 142gr | Lehigh Defense Controlled Chaos. ADI AR 2218 delivers the highest muzzle velocity at 3,114 fps; across all powders the maximum-charge window runs from 1,995 fps to 3,114 fps. Hodgdon TrailBoss 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 142.0 gr projectile in 0.284" calls for a 1:9.5 twist; slower twists will usually not stabilise this weight. Hodgdon TrailBoss, IMR 8133 Enduron, 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. Hodgdon Retumbo, ADI AR 2218, Vihtavuori N570 rank at the top here: for 7 mm Rem. Ultra Mag. with the .284 | 142gr | Lehigh Defense Controlled Chaos 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.