Load Specifications
Load data in caliber 7 mm Rem. Ultra Mag. with .284 | 125gr | Lehigh Defense Controlled Chaos bullet and 55 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ReloadSwiss RS 80 and Vihtavuori N568.
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>> | 88% | 56,115 psi | 88% | 3071 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 55,259 psi | 87% | 3166 fps | 98.3% |
| ADI AR 2209 | <<locked>> | 86% | 57,276 psi | 90% | 3166 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 88% | 55,753 psi | 87% | 3169 fps | 99.2% |
| ADI AR 2217 | <<locked>> | 96% | 54,708 psi | 86% | 3136 fps | 99.4% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 56,028 psi | 88% | 3235 fps | 97.2% |
| ADI AR 2225 | <<locked>> | 98% | 53,795 psi | 84% | 3156 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 57,392 psi | 90% | 3159 fps | 99.8% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 57,392 psi | 90% | 3159 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 82% | 57,087 psi | 89% | 3166 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 56,768 psi | 89% | 3153 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 88% | 56,231 psi | 88% | 3166 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 88% | 54,259 psi | 85% | 3084 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 54,592 psi | 86% | 3143 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 54,955 psi | 86% | 3159 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 53,461 psi | 84% | 3146 fps | 96.5% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 56,768 psi | 89% | 3123 fps | 97.4% |
| Bofors RP15 | <<locked>> | 90% | 55,637 psi | 87% | 3156 fps | 99.7% |
| Bofors RP30 | <<locked>> | 94% | 54,650 psi | 86% | 3146 fps | 99.4% |
| Bofors RP5 | <<locked>> | 88% | 56,231 psi | 88% | 3166 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 94% | 56,260 psi | 88% | 3163 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 86% | 54,781 psi | 86% | 3100 fps | 98.6% |
| Hodgdon H4831 SC | <<locked>> | 88% | 57,624 psi | 90% | 3143 fps | 99% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 57,276 psi | 90% | 3077 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 57,711 psi | 90% | 3287 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,492 psi | 59% | 2106 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 55,666 psi | 87% | 3087 fps | 99.9% |
| IMR 4831 | <<locked>> | 82% | 56,318 psi | 88% | 3091 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 55,332 psi | 87% | 3084 fps | 98.7% |
| IMR 7828 SSC | <<locked>> | 88% | 54,114 psi | 85% | 3146 fps | 99% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 52,939 psi | 83% | 3127 fps | 99.1% |
| Lovex S071 | <<locked>> | 92% | 54,317 psi | 85% | 3045 fps | 100% |
| Norma 204 | <<locked>> | 82% | 56,956 psi | 89% | 3140 fps | 99.7% |
| Norma 217ᴾ | <<locked>> | 100% | 54,027 psi | 85% | 3153 fps | 100% |
| Norma MRP | <<locked>> | 86% | 56,478 psi | 89% | 3186 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 55,245 psi | 87% | 3166 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 82% | 56,942 psi | 89% | 3136 fps | 100% |
| Ramshot Magnum | <<locked>> | 90% | 54,230 psi | 85% | 3094 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,377 psi | 60% | 2152 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 54,998 psi | 86% | 3209 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 54,549 psi | 85% | 3159 fps | 98.5% |
| Rottweil R 904 | <<locked>> | 84% | 54,085 psi | 85% | 3074 fps | 98.9% |
| Rottweil R 905 | <<locked>> | 86% | 56,536 psi | 89% | 3143 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 56,144 psi | 88% | 3140 fps | 99.7% |
| Somchem S361 | <<locked>> | 84% | 55,680 psi | 87% | 3054 fps | 98.7% |
| Somchem S365 | <<locked>> | 82% | 55,651 psi | 87% | 3084 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 56,971 psi | 89% | 3110 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 57,000 psi | 89% | 3091 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 86% | 55,999 psi | 88% | 3114 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 55,898 psi | 88% | 3182 fps | 98.9% |
| Vihtavuori N565 | <<locked>> | 92% | 57,072 psi | 89% | 3166 fps | 99.2% |
| Vihtavuori N568 | <<locked>> | 94% | 54,911 psi | 86% | 3166 fps | 98.1% |
| Vihtavuori N570 | <<locked>> | 96% | 56,202 psi | 88% | 3225 fps | 96.6% |
| Winchester StaBALL HD | <<locked>> | 88% | 54,128 psi | 85% | 3159 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 57,000 psi | 89% | 3104 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% | 42,525 psi | 67% | 2838 fps | 99.3% |
| Accurate MAGPRO | <<locked>> | 80% | 44,295 psi | 69% | 2959 fps | 95.5% |
| ADI AR 2209 | <<locked>> | 80% | 46,514 psi | 73% | 2976 fps | 98.3% |
| ADI AR 2213 | <<locked>> | 80% | 41,742 psi | 65% | 2904 fps | 95.9% |
| ADI AR 2217 | <<locked>> | 86% | 38,348 psi | 60% | 2808 fps | 95.2% |
| ADI AR 2218 | <<locked>> | 98% | 51,750 psi | 81% | 3156 fps | 96% |
| ADI AR 2225 | <<locked>> | 84% | 32,750 psi | 51% | 2703 fps | 96% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 46,862 psi | 73% | 2976 fps | 98.4% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 46,862 psi | 73% | 2976 fps | 98.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 53,258 psi | 83% | 3107 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 46,427 psi | 73% | 2969 fps | 98.4% |
| Alliant Reloder-22 | <<locked>> | 80% | 42,511 psi | 67% | 2913 fps | 97.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 41,089 psi | 64% | 2861 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 35,621 psi | 56% | 2776 fps | 98.5% |
| Alliant Reloder-26 | <<locked>> | 80% | 47,021 psi | 74% | 3028 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 49,356 psi | 77% | 3071 fps | 95.3% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 49,705 psi | 78% | 2999 fps | 95.6% |
| Bofors RP15 | <<locked>> | 80% | 39,552 psi | 62% | 2844 fps | 96.4% |
| Bofors RP30 | <<locked>> | 84% | 38,348 psi | 60% | 2825 fps | 95.3% |
| Bofors RP5 | <<locked>> | 80% | 42,511 psi | 67% | 2913 fps | 97.5% |
| Hodgdon H1000 | <<locked>> | 82% | 36,390 psi | 57% | 2762 fps | 95% |
| Hodgdon H4831 | <<locked>> | 80% | 44,396 psi | 70% | 2907 fps | 96.1% |
| Hodgdon H4831 SC | <<locked>> | 80% | 43,584 psi | 68% | 2890 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 50,082 psi | 78% | 2972 fps | 100% |
| Hodgdon Retumbo | 76.6 gr | 80% | 34,737 psi | 54% | 2802 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,108 psi | 44% | 1896 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 52,141 psi | 82% | 3028 fps | 99.7% |
| IMR 4831 | <<locked>> | 80% | 52,663 psi | 83% | 3038 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 45,455 psi | 71% | 2907 fps | 96.7% |
| IMR 7828 SSC | <<locked>> | 80% | 40,422 psi | 63% | 2881 fps | 95.5% |
| IMR 8133 Enduron | <<locked>> | 92% | 39,798 psi | 62% | 2867 fps | 95.8% |
| Lovex S071 | <<locked>> | 80% | 36,506 psi | 57% | 2710 fps | 98% |
| Norma 204 | <<locked>> | 80% | 53,229 psi | 83% | 3081 fps | 99.3% |
| Norma 217 | <<locked>> | 88% | 34,751 psi | 54% | 2762 fps | 96.1% |
| Norma MRP | <<locked>> | 80% | 45,266 psi | 71% | 2986 fps | 99.1% |
| Ramshot Grand | <<locked>> | 80% | 40,466 psi | 63% | 2887 fps | 96% |
| Ramshot Hunter | <<locked>> | 80% | 53,316 psi | 84% | 3081 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 36,593 psi | 57% | 2756 fps | 96.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,819 psi | 45% | 1942 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 34,316 psi | 54% | 2772 fps | 96.6% |
| ReloadSwiss RS 80 | 90.9 gr | 88% | 43,018 psi | 67% | 2940 fps | 95.5% |
| Rottweil R 904 | <<locked>> | 80% | 47,253 psi | 74% | 2953 fps | 97.6% |
| Rottweil R 905 | <<locked>> | 80% | 45,919 psi | 72% | 2956 fps | 98.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 45,614 psi | 71% | 2953 fps | 98.3% |
| Somchem S361 | <<locked>> | 80% | 48,617 psi | 76% | 2933 fps | 97.4% |
| Somchem S365 | <<locked>> | 80% | 51,938 psi | 81% | 3035 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 46,485 psi | 73% | 2933 fps | 99% |
| Vihtavuori N165 | <<locked>> | 80% | 40,567 psi | 64% | 2799 fps | 97.5% |
| Vihtavuori N555 | <<locked>> | 80% | 45,716 psi | 72% | 2946 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 44,947 psi | 70% | 2976 fps | 96.4% |
| Vihtavuori N565 | <<locked>> | 82% | 40,030 psi | 63% | 2841 fps | 95.1% |
| Vihtavuori N568 | 87.9 gr | 88% | 43,903 psi | 69% | 2956 fps | 95.1% |
| Vihtavuori N570 | <<locked>> | 94% | 52,127 psi | 82% | 3153 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 80% | 39,392 psi | 62% | 2907 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 42,830 psi | 67% | 2854 fps | 97.6% |
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 55 powders for 7 mm Rem. Ultra Mag. loaded with the .284 | 125gr | Lehigh Defense Controlled Chaos. Hodgdon Retumbo delivers the highest muzzle velocity at 3,287 fps; across all powders the maximum-charge window runs from 2,106 fps to 3,287 fps. ADI AR 2218 gives the best case fill at 100 %, and 55 of the 55 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 125.0 gr projectile in 0.284" calls for a 1:10.0 twist; slower twists will usually not stabilise this weight. ADI AR 2218, 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. Hodgdon Retumbo, ReloadSwiss RS 80, Vihtavuori N568 rank at the top here: for 7 mm Rem. Ultra Mag. with the .284 | 125gr | 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.