Load Specifications
Load data in caliber 7 mm Rem. Ultra Mag. with .284 | 123gr | RWS Kegelspitz bullet and 52 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N570, Hodgdon Retumbo and ReloadSwiss RS 76.
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% | 54,215 psi | 85% | 3054 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 57,377 psi | 90% | 3212 fps | 98.7% |
| ADI AR 2209 | <<locked>> | 84% | 55,172 psi | 86% | 3143 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 86% | 53,940 psi | 85% | 3150 fps | 98.9% |
| ADI AR 2217 | <<locked>> | 96% | 57,087 psi | 89% | 3182 fps | 99.7% |
| ADI AR 2218 | <<locked>> | 98% | 54,346 psi | 85% | 3215 fps | 96.9% |
| ADI AR 2225 | <<locked>> | 98% | 56,608 psi | 89% | 3205 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 55,535 psi | 87% | 3143 fps | 99.7% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 55,535 psi | 87% | 3143 fps | 99.7% |
| Alliant Reloder-19 | <<locked>> | 84% | 54,955 psi | 86% | 3133 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 86% | 54,534 psi | 85% | 3146 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 88% | 56,231 psi | 88% | 3120 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 57,072 psi | 89% | 3189 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 57,377 psi | 90% | 3202 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 56,173 psi | 88% | 3199 fps | 97.2% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 56,420 psi | 88% | 3186 fps | 96.7% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 54,897 psi | 86% | 3104 fps | 97.1% |
| Bofors RP15 | <<locked>> | 90% | 57,609 psi | 90% | 3196 fps | 99.8% |
| Bofors RP30 | <<locked>> | 94% | 57,116 psi | 90% | 3196 fps | 99.6% |
| Bofors RP5 | <<locked>> | 86% | 54,534 psi | 85% | 3146 fps | 99.6% |
| Hodgdon H1000 | <<locked>> | 92% | 54,563 psi | 86% | 3143 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 86% | 56,681 psi | 89% | 3143 fps | 98.9% |
| Hodgdon H4831 SC | <<locked>> | 86% | 55,709 psi | 87% | 3127 fps | 98.7% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 55,216 psi | 87% | 3064 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 56,231 psi | 88% | 3271 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,623 psi | 59% | 2133 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 57,130 psi | 90% | 3123 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 56,971 psi | 89% | 3127 fps | 99% |
| IMR 7828 SSC | <<locked>> | 88% | 56,231 psi | 88% | 3196 fps | 99.3% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 55,535 psi | 87% | 3176 fps | 99.5% |
| Lovex S071 | <<locked>> | 92% | 56,144 psi | 88% | 3081 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 56,753 psi | 89% | 3202 fps | 100% |
| Norma MRP | <<locked>> | 84% | 54,621 psi | 86% | 3163 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 53,447 psi | 84% | 3150 fps | 99.2% |
| Ramshot Magnum | <<locked>> | 90% | 56,492 psi | 89% | 3140 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,493 psi | 60% | 2178 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 53,388 psi | 84% | 3186 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 57,479 psi | 90% | 3212 fps | 99% |
| Rottweil R 904 | <<locked>> | 84% | 55,680 psi | 87% | 3117 fps | 99.2% |
| Rottweil R 905 | <<locked>> | 84% | 54,534 psi | 85% | 3123 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 54,157 psi | 85% | 3117 fps | 99.6% |
| Somchem S361 | <<locked>> | 84% | 57,493 psi | 90% | 3097 fps | 99% |
| Somchem S365 | <<locked>> | 82% | 57,479 psi | 90% | 3120 fps | 100% |
| Somchem S385 | <<locked>> | 84% | 55,085 psi | 86% | 3094 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 88% | 55,129 psi | 86% | 3074 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 84% | 54,172 psi | 85% | 3097 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 53,998 psi | 85% | 3159 fps | 98.6% |
| Vihtavuori N565 | <<locked>> | 90% | 55,332 psi | 87% | 3150 fps | 99% |
| Vihtavuori N568 | <<locked>> | 94% | 57,435 psi | 90% | 3215 fps | 98.6% |
| Vihtavuori N570 | <<locked>> | 94% | 54,665 psi | 86% | 3205 fps | 96.3% |
| Winchester StaBALL HD | <<locked>> | 88% | 57,043 psi | 89% | 3205 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 55,027 psi | 86% | 3087 fps | 99.7% |
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% | 44,048 psi | 69% | 2877 fps | 99.5% |
| Accurate MAGPRO | <<locked>> | 80% | 46,064 psi | 72% | 3002 fps | 96.1% |
| ADI AR 2209 | <<locked>> | 80% | 48,066 psi | 75% | 3018 fps | 98.7% |
| ADI AR 2213 | <<locked>> | 80% | 43,381 psi | 68% | 2946 fps | 96.5% |
| ADI AR 2217 | <<locked>> | 86% | 39,842 psi | 62% | 2854 fps | 95.9% |
| ADI AR 2218 | <<locked>> | 96% | 50,140 psi | 79% | 3130 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 82% | 31,778 psi | 50% | 2677 fps | 95.4% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 48,385 psi | 76% | 3015 fps | 98.7% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 48,385 psi | 76% | 3015 fps | 98.7% |
| Alliant Reloder-19 | <<locked>> | 80% | 47,935 psi | 75% | 3009 fps | 98.7% |
| Alliant Reloder-22 | <<locked>> | 80% | 44,164 psi | 69% | 2956 fps | 97.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 42,786 psi | 67% | 2900 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 37,086 psi | 58% | 2822 fps | 98.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 49,023 psi | 77% | 3071 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 52,040 psi | 82% | 3127 fps | 96.1% |
| Alliant Reloder-50 | <<locked>> | 98% | 52,025 psi | 82% | 3104 fps | 95.5% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 47,964 psi | 75% | 2976 fps | 95.2% |
| Bofors RP15 | <<locked>> | 80% | 40,915 psi | 64% | 2884 fps | 96.9% |
| Bofors RP30 | <<locked>> | 84% | 40,074 psi | 63% | 2871 fps | 96% |
| Bofors RP5 | <<locked>> | 80% | 44,164 psi | 69% | 2956 fps | 97.9% |
| Hodgdon H1000 | <<locked>> | 82% | 37,782 psi | 59% | 2808 fps | 95.7% |
| Hodgdon H4831 | <<locked>> | 80% | 45,963 psi | 72% | 2949 fps | 96.7% |
| Hodgdon H4831 SC | <<locked>> | 80% | 45,165 psi | 71% | 2933 fps | 96.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 51,663 psi | 81% | 3012 fps | 100% |
| Hodgdon Retumbo | 79.6 gr | 80% | 36,114 psi | 57% | 2848 fps | 96% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,166 psi | 44% | 1923 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 53,664 psi | 84% | 3071 fps | 99.8% |
| IMR 4955 Enduron | <<locked>> | 80% | 46,818 psi | 73% | 2946 fps | 97.1% |
| IMR 7828 SSC | <<locked>> | 80% | 41,945 psi | 66% | 2923 fps | 96.1% |
| IMR 8133 Enduron | <<locked>> | 90% | 38,914 psi | 61% | 2851 fps | 95.4% |
| Lovex S071 | <<locked>> | 80% | 37,768 psi | 59% | 2746 fps | 98.3% |
| Norma 217 | <<locked>> | 86% | 33,895 psi | 53% | 2743 fps | 95.6% |
| Norma MRP | <<locked>> | 80% | 47,021 psi | 74% | 3028 fps | 99.4% |
| Ramshot Grand | <<locked>> | 80% | 42,337 psi | 66% | 2936 fps | 96.6% |
| Ramshot Magnum | <<locked>> | 80% | 38,290 psi | 60% | 2799 fps | 97.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,863 psi | 45% | 1965 fps | 100% |
| ReloadSwiss RS 76 | 85.2 gr | 80% | 35,795 psi | 56% | 2818 fps | 97.3% |
| ReloadSwiss RS 80 | <<locked>> | 86% | 41,829 psi | 66% | 2917 fps | 95% |
| Rottweil R 904 | <<locked>> | 80% | 48,747 psi | 76% | 2992 fps | 98% |
| Rottweil R 905 | <<locked>> | 80% | 47,529 psi | 74% | 2999 fps | 98.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 47,195 psi | 74% | 2995 fps | 98.6% |
| Somchem S361 | <<locked>> | 80% | 50,140 psi | 79% | 2972 fps | 97.8% |
| Somchem S365 | <<locked>> | 80% | 53,780 psi | 84% | 3071 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 48,109 psi | 75% | 2976 fps | 99.3% |
| Vihtavuori N165 | <<locked>> | 80% | 41,959 psi | 66% | 2838 fps | 98% |
| Vihtavuori N555 | <<locked>> | 80% | 47,442 psi | 74% | 2986 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 46,601 psi | 73% | 3018 fps | 96.9% |
| Vihtavuori N565 | <<locked>> | 82% | 41,727 psi | 65% | 2887 fps | 95.7% |
| Vihtavuori N568 | <<locked>> | 88% | 45,992 psi | 72% | 3005 fps | 95.8% |
| Vihtavuori N570 | 95 gr | 92% | 50,647 psi | 79% | 3130 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 80% | 41,452 psi | 65% | 2949 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 44,382 psi | 70% | 2894 fps | 98% |
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 52 powders for 7 mm Rem. Ultra Mag. loaded with the .284 | 123gr | RWS Kegelspitz. Hodgdon Retumbo delivers the highest muzzle velocity at 3,271 fps; across all powders the maximum-charge window runs from 2,133 fps to 3,271 fps. Alliant Reloder-50 gives the best case fill at 100 %, and 52 of the 52 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 123.0 gr projectile in 0.284" calls for a 1:14.5 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. Vihtavuori N570, Hodgdon Retumbo, ReloadSwiss RS 76 rank at the top here: for 7 mm Rem. Ultra Mag. with the .284 | 123gr | RWS Kegelspitz 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.