Load Specifications
Load data in caliber 7 mm Rem. Ultra Mag. with .284 | 140gr | Alaska Bullet Works Kodiak SP SPBC bullet and 50 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 Hodgdon Retumbo.
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% | 57,551 psi | 90% | 2966 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 49,676 psi | 78% | 2904 fps | 96.1% |
| Accurate MAGPRO | <<locked>> | 84% | 56,826 psi | 89% | 3068 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 82% | 54,505 psi | 85% | 2995 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 86% | 57,246 psi | 90% | 3068 fps | 99.8% |
| ADI AR 2217 | <<locked>> | 94% | 56,652 psi | 89% | 3045 fps | 99.9% |
| ADI AR 2218 | <<locked>> | 96% | 53,621 psi | 84% | 3087 fps | 97.9% |
| ADI AR 2225 | <<locked>> | 96% | 56,289 psi | 88% | 3061 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 54,172 psi | 85% | 2982 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 84% | 53,867 psi | 84% | 3002 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 86% | 55,956 psi | 88% | 2972 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 56,811 psi | 89% | 3041 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 56,695 psi | 89% | 3048 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 55,709 psi | 87% | 3068 fps | 98% |
| Alliant Reloder-50 | <<locked>> | 98% | 56,043 psi | 88% | 3058 fps | 97.6% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 57,595 psi | 90% | 3018 fps | 98.4% |
| Bofors RP15 | <<locked>> | 88% | 57,174 psi | 90% | 3051 fps | 100% |
| Bofors RP30 | <<locked>> | 92% | 56,768 psi | 89% | 3058 fps | 99.9% |
| Bofors RP5 | <<locked>> | 84% | 53,867 psi | 84% | 3002 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 90% | 54,099 psi | 85% | 3002 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 84% | 55,767 psi | 87% | 2995 fps | 99.4% |
| Hodgdon H4831 SC | <<locked>> | 84% | 54,810 psi | 86% | 2982 fps | 99.3% |
| Hodgdon Retumbo | <<locked>> | 90% | 56,159 psi | 88% | 3127 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,811 psi | 59% | 2014 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 56,014 psi | 88% | 2976 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 86% | 55,637 psi | 87% | 3048 fps | 99.7% |
| IMR 8133 Enduron | <<locked>> | 98% | 55,303 psi | 87% | 3041 fps | 99.8% |
| Lovex S071 | <<locked>> | 90% | 55,767 psi | 87% | 2940 fps | 100% |
| Norma 217 | <<locked>> | 98% | 56,710 psi | 89% | 3068 fps | 100% |
| Norma MRP | <<locked>> | 82% | 53,882 psi | 84% | 3015 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 57,290 psi | 90% | 3071 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 88% | 55,869 psi | 88% | 2995 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,754 psi | 61% | 2060 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 57,653 psi | 90% | 3110 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 56,811 psi | 89% | 3074 fps | 99.5% |
| Rottweil R 904 | <<locked>> | 82% | 54,853 psi | 86% | 2966 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 84% | 57,653 psi | 90% | 3031 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 51,648 psi | 81% | 2920 fps | 96.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 57,319 psi | 90% | 3031 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 56,420 psi | 88% | 2953 fps | 99.5% |
| Somchem S385 | <<locked>> | 82% | 54,375 psi | 85% | 2946 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 54,534 psi | 85% | 2933 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 54,085 psi | 85% | 2943 fps | 96.1% |
| Vihtavuori N555 | <<locked>> | 84% | 57,406 psi | 90% | 2999 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 57,334 psi | 90% | 3081 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 88% | 54,882 psi | 86% | 3009 fps | 99.5% |
| Vihtavuori N568 | <<locked>> | 92% | 56,971 psi | 89% | 3077 fps | 99.2% |
| Vihtavuori N570 | <<locked>> | 92% | 54,360 psi | 85% | 3074 fps | 97.3% |
| Winchester StaBALL HD | <<locked>> | 86% | 56,913 psi | 89% | 3058 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 54,172 psi | 85% | 2940 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% | 46,862 psi | 73% | 2802 fps | 100% |
| Accurate 8700 | <<locked>> | 98% | 46,035 psi | 72% | 2838 fps | 95% |
| Accurate MAGPRO | <<locked>> | 80% | 48,979 psi | 77% | 2933 fps | 98% |
| ADI AR 2209 | <<locked>> | 80% | 50,749 psi | 80% | 2933 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 80% | 46,151 psi | 72% | 2877 fps | 98.3% |
| ADI AR 2217 | <<locked>> | 82% | 36,854 psi | 58% | 2667 fps | 96% |
| ADI AR 2218 | 94.8 gr | 92% | 46,108 psi | 72% | 2933 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 80% | 31,778 psi | 50% | 2572 fps | 96.9% |
| Alliant Reloder-19 | <<locked>> | 80% | 50,720 psi | 79% | 2927 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 80% | 46,934 psi | 74% | 2881 fps | 99.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 45,643 psi | 72% | 2815 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 39,726 psi | 62% | 2753 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 52,678 psi | 83% | 2989 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 47,732 psi | 75% | 2927 fps | 96% |
| Alliant Reloder-50 | <<locked>> | 94% | 48,008 psi | 75% | 2913 fps | 95.5% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 44,179 psi | 69% | 2782 fps | 95.2% |
| Bofors RP15 | <<locked>> | 80% | 43,584 psi | 68% | 2815 fps | 98.6% |
| Bofors RP30 | <<locked>> | 80% | 37,246 psi | 58% | 2687 fps | 96.1% |
| Bofors RP5 | <<locked>> | 80% | 46,934 psi | 74% | 2881 fps | 99.3% |
| Hodgdon H1000 | <<locked>> | 80% | 37,434 psi | 59% | 2684 fps | 96.9% |
| Hodgdon H4831 | <<locked>> | 80% | 48,602 psi | 76% | 2874 fps | 98.3% |
| Hodgdon H4831 SC | <<locked>> | 80% | 47,747 psi | 75% | 2861 fps | 98.1% |
| Hodgdon Retumbo | 77.8 gr | 80% | 38,899 psi | 61% | 2802 fps | 98.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,398 psi | 45% | 1814 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 49,095 psi | 77% | 2861 fps | 98.5% |
| IMR 7828 SSC | <<locked>> | 80% | 44,918 psi | 70% | 2858 fps | 98% |
| IMR 8133 Enduron | <<locked>> | 86% | 36,390 psi | 57% | 2674 fps | 95.6% |
| Lovex S071 | <<locked>> | 80% | 40,292 psi | 63% | 2677 fps | 99.5% |
| Norma 217 | <<locked>> | 82% | 31,836 psi | 50% | 2572 fps | 95.9% |
| Norma MRP | <<locked>> | 80% | 50,183 psi | 79% | 2953 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 45,556 psi | 71% | 2874 fps | 98.5% |
| Ramshot Magnum | <<locked>> | 80% | 41,205 psi | 65% | 2743 fps | 98.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,153 psi | 46% | 1854 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 38,696 psi | 61% | 2776 fps | 99.2% |
| ReloadSwiss RS 80 | <<locked>> | 84% | 41,640 psi | 65% | 2795 fps | 96.2% |
| Rottweil R 904 | <<locked>> | 80% | 51,372 psi | 81% | 2907 fps | 99.2% |
| Rottweil R 905 | <<locked>> | 80% | 50,415 psi | 79% | 2917 fps | 99.7% |
| SNPE Vectan SP 13 | <<locked>> | 98% | 48,022 psi | 75% | 2854 fps | 95.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 50,082 psi | 78% | 2917 fps | 99.6% |
| Somchem S361 | <<locked>> | 80% | 52,620 psi | 82% | 2890 fps | 99% |
| Somchem S385 | <<locked>> | 80% | 50,763 psi | 80% | 2887 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 80% | 44,556 psi | 70% | 2766 fps | 99.2% |
| Vihtavuori N170 | <<locked>> | 88% | 50,517 psi | 79% | 2884 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 80% | 50,430 psi | 79% | 2897 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 49,632 psi | 78% | 2949 fps | 98.6% |
| Vihtavuori N565 | <<locked>> | 80% | 41,524 psi | 65% | 2762 fps | 96.8% |
| Vihtavuori N568 | <<locked>> | 84% | 42,496 psi | 67% | 2815 fps | 95.9% |
| Vihtavuori N570 | 88.8 gr | 88% | 46,905 psi | 74% | 2933 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 45,092 psi | 71% | 2877 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 46,978 psi | 74% | 2818 fps | 99.3% |
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 | Alaska Bullet Works Kodiak SP SPBC. Hodgdon Retumbo delivers the highest muzzle velocity at 3,127 fps; across all powders the maximum-charge window runs from 2,014 fps to 3,127 fps. Accurate 8700 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 1:12.5 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, Hodgdon Retumbo rank at the top here: for 7 mm Rem. Ultra Mag. with the .284 | 140gr | Alaska Bullet Works Kodiak SP SPBC 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.