Load Specifications
Load data in caliber 7 mm Rem. Ultra Mag. with .284 | 140gr | Frontier BTSP 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, ReloadSwiss RS 76 and ADI AR 2218.
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% | 55,259 psi | 87% | 2936 fps | 100% |
| Accurate MAGPRO | <<locked>> | 84% | 54,317 psi | 85% | 3035 fps | 98.8% |
| ADI AR 2209 | <<locked>> | 84% | 56,115 psi | 88% | 3025 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 86% | 54,911 psi | 86% | 3038 fps | 99.5% |
| ADI AR 2217 | <<locked>> | 94% | 53,998 psi | 85% | 3009 fps | 99.7% |
| ADI AR 2218 | <<locked>> | 98% | 54,984 psi | 86% | 3117 fps | 98% |
| ADI AR 2225 | <<locked>> | 98% | 57,392 psi | 90% | 3091 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 56,275 psi | 88% | 3022 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 84% | 55,724 psi | 87% | 3015 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 86% | 55,448 psi | 87% | 3031 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 88% | 57,305 psi | 90% | 2995 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 54,186 psi | 85% | 3015 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 54,114 psi | 85% | 3022 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 57,072 psi | 89% | 3100 fps | 98.2% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 57,072 psi | 89% | 3084 fps | 97.7% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 55,680 psi | 87% | 2992 fps | 98% |
| Bofors RP15 | <<locked>> | 88% | 54,882 psi | 86% | 3025 fps | 99.9% |
| Bofors RP30 | <<locked>> | 92% | 54,085 psi | 85% | 3025 fps | 99.7% |
| Bofors RP5 | <<locked>> | 86% | 55,448 psi | 87% | 3031 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 92% | 55,593 psi | 87% | 3035 fps | 100% |
| Hodgdon H4831 | <<locked>> | 86% | 57,638 psi | 90% | 3028 fps | 99.5% |
| Hodgdon H4831 SC | <<locked>> | 86% | 56,623 psi | 89% | 3012 fps | 99.4% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 56,333 psi | 88% | 2936 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 57,377 psi | 90% | 3156 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,739 psi | 59% | 2005 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 54,128 psi | 85% | 2949 fps | 99.2% |
| IMR 7828 SSC | <<locked>> | 88% | 57,188 psi | 90% | 3081 fps | 99.8% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 56,434 psi | 88% | 3071 fps | 99.9% |
| Lovex S071 | <<locked>> | 92% | 57,087 psi | 89% | 2966 fps | 100% |
| Norma 217 | <<locked>> | 98% | 53,722 psi | 84% | 3031 fps | 100% |
| Norma MRP | <<locked>> | 84% | 55,637 psi | 87% | 3048 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 54,549 psi | 85% | 3038 fps | 99.7% |
| Ramshot Magnum | <<locked>> | 90% | 57,493 psi | 90% | 3025 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,682 psi | 61% | 2051 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 54,302 psi | 85% | 3077 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 53,882 psi | 84% | 3038 fps | 99% |
| Rottweil R 904 | <<locked>> | 84% | 56,492 psi | 89% | 2995 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 84% | 55,680 psi | 87% | 3009 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 55,303 psi | 87% | 3005 fps | 99.9% |
| Somchem S361 | <<locked>> | 82% | 54,505 psi | 85% | 2923 fps | 99.1% |
| Somchem S385 | <<locked>> | 84% | 55,970 psi | 88% | 2976 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 56,115 psi | 88% | 2959 fps | 100% |
| Vihtavuori N170 | <<locked>> | 92% | 55,767 psi | 87% | 2976 fps | 96.3% |
| Vihtavuori N555 | <<locked>> | 84% | 55,259 psi | 87% | 2976 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 55,013 psi | 86% | 3048 fps | 99.3% |
| Vihtavuori N565 | <<locked>> | 90% | 56,231 psi | 88% | 3038 fps | 99.6% |
| Vihtavuori N568 | <<locked>> | 92% | 54,215 psi | 85% | 3041 fps | 98.7% |
| Vihtavuori N570 | <<locked>> | 94% | 55,622 psi | 87% | 3104 fps | 97.5% |
| Winchester StaBALL HD | <<locked>> | 86% | 53,809 psi | 84% | 3028 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 55,796 psi | 87% | 2969 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% | 44,962 psi | 70% | 2772 fps | 99.9% |
| Accurate MAGPRO | <<locked>> | 80% | 46,934 psi | 74% | 2900 fps | 97.4% |
| ADI AR 2209 | <<locked>> | 80% | 48,965 psi | 77% | 2907 fps | 99.4% |
| ADI AR 2213 | <<locked>> | 80% | 44,208 psi | 69% | 2844 fps | 97.7% |
| ADI AR 2217 | <<locked>> | 82% | 35,273 psi | 55% | 2635 fps | 95.1% |
| ADI AR 2218 | 93.5 gr | 94% | 47,224 psi | 74% | 2966 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 80% | 30,327 psi | 48% | 2536 fps | 96% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 49,269 psi | 77% | 2907 fps | 99.4% |
| Alliant Reloder-19 | <<locked>> | 80% | 48,849 psi | 77% | 2900 fps | 99.4% |
| Alliant Reloder-22 | <<locked>> | 80% | 45,005 psi | 71% | 2851 fps | 98.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 43,758 psi | 69% | 2792 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 37,956 psi | 59% | 2726 fps | 99.7% |
| Alliant Reloder-26 | <<locked>> | 80% | 50,140 psi | 79% | 2963 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 45,237 psi | 71% | 2887 fps | 95% |
| Alliant Reloder-50 | <<locked>> | 96% | 48,994 psi | 77% | 2946 fps | 95.7% |
| Baschieri & Pellagri 109 | <<locked>> | 82% | 45,455 psi | 71% | 2812 fps | 95.4% |
| Bofors RP15 | <<locked>> | 80% | 41,887 psi | 66% | 2785 fps | 98.1% |
| Bofors RP30 | <<locked>> | 80% | 35,462 psi | 56% | 2651 fps | 95.3% |
| Bofors RP5 | <<locked>> | 80% | 45,005 psi | 71% | 2851 fps | 98.9% |
| Hodgdon H1000 | <<locked>> | 80% | 35,824 psi | 56% | 2651 fps | 96% |
| Hodgdon H4831 | <<locked>> | 80% | 46,804 psi | 73% | 2844 fps | 97.8% |
| Hodgdon H4831 SC | <<locked>> | 80% | 45,934 psi | 72% | 2828 fps | 97.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 52,750 psi | 83% | 2887 fps | 100% |
| Hodgdon Retumbo | 75.1 gr | 80% | 37,043 psi | 58% | 2762 fps | 97.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,311 psi | 44% | 1801 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 47,543 psi | 75% | 2838 fps | 98.1% |
| IMR 7828 SSC | <<locked>> | 80% | 42,931 psi | 67% | 2825 fps | 97.4% |
| IMR 8133 Enduron | <<locked>> | 88% | 36,985 psi | 58% | 2697 fps | 95.8% |
| Lovex S071 | <<locked>> | 80% | 38,711 psi | 61% | 2651 fps | 99.2% |
| Norma 217 | <<locked>> | 84% | 32,445 psi | 51% | 2602 fps | 96.2% |
| Norma MRP | <<locked>> | 80% | 48,167 psi | 75% | 2927 fps | 99.9% |
| Ramshot Grand | <<locked>> | 80% | 43,308 psi | 68% | 2841 fps | 97.9% |
| Ramshot Magnum | <<locked>> | 80% | 39,247 psi | 62% | 2713 fps | 98.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,066 psi | 46% | 1844 fps | 100% |
| ReloadSwiss RS 76 | 80.4 gr | 80% | 36,680 psi | 57% | 2736 fps | 98.6% |
| ReloadSwiss RS 80 | <<locked>> | 84% | 39,436 psi | 62% | 2759 fps | 95.2% |
| Rottweil R 904 | <<locked>> | 80% | 49,661 psi | 78% | 2881 fps | 98.8% |
| Rottweil R 905 | <<locked>> | 80% | 48,428 psi | 76% | 2890 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 48,080 psi | 75% | 2884 fps | 99.3% |
| Somchem S361 | <<locked>> | 80% | 50,894 psi | 80% | 2864 fps | 98.6% |
| Somchem S385 | <<locked>> | 80% | 48,921 psi | 77% | 2861 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 80% | 42,786 psi | 67% | 2736 fps | 98.9% |
| Vihtavuori N170 | <<locked>> | 90% | 51,924 psi | 81% | 2910 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 80% | 48,472 psi | 76% | 2871 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 47,703 psi | 75% | 2920 fps | 98.1% |
| Vihtavuori N565 | <<locked>> | 80% | 39,624 psi | 62% | 2726 fps | 96.1% |
| Vihtavuori N568 | <<locked>> | 86% | 43,453 psi | 68% | 2841 fps | 96.1% |
| Vihtavuori N570 | <<locked>> | 90% | 47,935 psi | 75% | 2966 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 42,511 psi | 67% | 2848 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 45,208 psi | 71% | 2792 fps | 98.9% |
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 50 powders for 7 mm Rem. Ultra Mag. loaded with the .284 | 140gr | Frontier BTSP. Hodgdon Retumbo delivers the highest muzzle velocity at 3,156 fps; across all powders the maximum-charge window runs from 2,005 fps to 3,156 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 140.0 gr projectile in 0.284" calls for a 1:9.0 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. Hodgdon Retumbo, ReloadSwiss RS 76, ADI AR 2218 rank at the top here: for 7 mm Rem. Ultra Mag. with the .284 | 140gr | Frontier BTSP 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.