Load Specifications
Load data in caliber 7 mm Rem. Ultra Mag. with .284 | 127gr | Hasler Hunting bullet and 58 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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You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 88% | 55,448 psi | 87% | 3048 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 54,853 psi | 86% | 3143 fps | 98.4% |
| ADI AR 2209 | <<locked>> | 86% | 57,058 psi | 89% | 3146 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 88% | 55,521 psi | 87% | 3150 fps | 99.2% |
| ADI AR 2217 | <<locked>> | 96% | 54,592 psi | 86% | 3117 fps | 99.5% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 55,840 psi | 88% | 3222 fps | 97.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 57,653 psi | 90% | 3196 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 57,130 psi | 90% | 3140 fps | 99.8% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 57,130 psi | 90% | 3140 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 82% | 56,753 psi | 89% | 3143 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 56,521 psi | 89% | 3130 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 88% | 55,854 psi | 88% | 3143 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 88% | 53,911 psi | 84% | 3058 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 54,491 psi | 85% | 3123 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 54,476 psi | 85% | 3133 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 57,609 psi | 90% | 3199 fps | 97.6% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 56,594 psi | 89% | 3104 fps | 97.5% |
| Bofors RP15 | <<locked>> | 90% | 55,259 psi | 87% | 3130 fps | 99.7% |
| Bofors RP30 | <<locked>> | 94% | 54,331 psi | 85% | 3127 fps | 99.4% |
| Bofors RP5 | <<locked>> | 88% | 55,854 psi | 88% | 3143 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 94% | 56,202 psi | 88% | 3146 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 86% | 54,534 psi | 85% | 3081 fps | 98.6% |
| Hodgdon H4831 SC | <<locked>> | 88% | 57,377 psi | 90% | 3127 fps | 99% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 56,985 psi | 89% | 3058 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 57,696 psi | 90% | 3268 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,463 psi | 59% | 2093 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 55,434 psi | 87% | 3068 fps | 99.9% |
| IMR 4831 | <<locked>> | 82% | 55,941 psi | 88% | 3071 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 55,114 psi | 86% | 3068 fps | 98.8% |
| IMR 7828 SSC | <<locked>> | 88% | 53,882 psi | 84% | 3130 fps | 99% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 52,417 psi | 82% | 3104 fps | 99.1% |
| Lovex S070 | <<locked>> | 82% | 57,377 psi | 90% | 3097 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 57,319 psi | 90% | 3071 fps | 100% |
| Norma 204 | <<locked>> | 82% | 56,710 psi | 89% | 3120 fps | 99.7% |
| Norma 217ᴾ | <<locked>> | 100% | 53,708 psi | 84% | 3130 fps | 100% |
| Norma MRP | <<locked>> | 86% | 56,115 psi | 88% | 3163 fps | 100% |
| Norma URP | <<locked>> | 82% | 57,450 psi | 90% | 3117 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 55,172 psi | 86% | 3150 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 82% | 56,681 psi | 89% | 3117 fps | 100% |
| Ramshot Magnum | <<locked>> | 90% | 53,780 psi | 84% | 3071 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,305 psi | 60% | 2139 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 54,824 psi | 86% | 3186 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 54,215 psi | 85% | 3136 fps | 98.6% |
| Rottweil R 904 | <<locked>> | 86% | 57,566 psi | 90% | 3117 fps | 99.4% |
| Rottweil R 905 | <<locked>> | 86% | 56,202 psi | 88% | 3123 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 82% | 57,377 psi | 90% | 3097 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 55,811 psi | 87% | 3117 fps | 99.8% |
| Somchem S361 | <<locked>> | 84% | 55,332 psi | 87% | 3035 fps | 98.8% |
| Somchem S365 | <<locked>> | 82% | 55,317 psi | 87% | 3064 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 56,521 psi | 89% | 3087 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 56,652 psi | 89% | 3071 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 86% | 55,434 psi | 87% | 3087 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 55,550 psi | 87% | 3159 fps | 98.9% |
| Vihtavuori N565 | <<locked>> | 92% | 56,724 psi | 89% | 3146 fps | 99.3% |
| Vihtavuori N568 | <<locked>> | 94% | 54,621 psi | 86% | 3146 fps | 98.2% |
| Vihtavuori N570 | <<locked>> | 96% | 55,956 psi | 88% | 3205 fps | 96.8% |
| Winchester StaBALL HD | <<locked>> | 88% | 53,954 psi | 85% | 3136 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 56,855 psi | 89% | 3084 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% | 41,785 psi | 65% | 2812 fps | 99.3% |
| Accurate MAGPRO | <<locked>> | 80% | 43,801 psi | 69% | 2930 fps | 95.5% |
| ADI AR 2209 | <<locked>> | 80% | 46,224 psi | 72% | 2956 fps | 98.4% |
| ADI AR 2213 | <<locked>> | 80% | 41,423 psi | 65% | 2881 fps | 96% |
| ADI AR 2217 | <<locked>> | 86% | 37,884 psi | 59% | 2782 fps | 95.1% |
| ADI AR 2218 | <<locked>> | 98% | 51,517 psi | 81% | 3136 fps | 96.1% |
| ADI AR 2225 | <<locked>> | 84% | 32,184 psi | 50% | 2671 fps | 95.8% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 46,557 psi | 73% | 2956 fps | 98.5% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 46,557 psi | 73% | 2956 fps | 98.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 53,084 psi | 83% | 3087 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 46,137 psi | 72% | 2949 fps | 98.4% |
| Alliant Reloder-22 | <<locked>> | 80% | 42,061 psi | 66% | 2887 fps | 97.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 40,654 psi | 64% | 2835 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 35,143 psi | 55% | 2749 fps | 98.5% |
| Alliant Reloder-26 | <<locked>> | 80% | 46,514 psi | 73% | 3002 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 49,008 psi | 77% | 3048 fps | 95.3% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 49,472 psi | 78% | 2979 fps | 95.7% |
| Bofors RP15 | <<locked>> | 80% | 38,943 psi | 61% | 2815 fps | 96.3% |
| Bofors RP30 | <<locked>> | 84% | 37,768 psi | 59% | 2795 fps | 95.2% |
| Bofors RP5 | <<locked>> | 80% | 42,061 psi | 66% | 2887 fps | 97.5% |
| Hodgdon H1000 | <<locked>> | 84% | 38,653 psi | 61% | 2805 fps | 96.2% |
| Hodgdon H4831 | <<locked>> | 80% | 44,048 psi | 69% | 2887 fps | 96.2% |
| Hodgdon H4831 SC | <<locked>> | 80% | 43,236 psi | 68% | 2871 fps | 96% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 49,763 psi | 78% | 2953 fps | 100% |
| Hodgdon Retumbo | 77 gr | 80% | 34,258 psi | 54% | 2772 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,963 psi | 44% | 1883 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 51,895 psi | 81% | 3012 fps | 99.8% |
| IMR 4831 | <<locked>> | 80% | 52,257 psi | 82% | 3015 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 45,165 psi | 71% | 2887 fps | 96.8% |
| IMR 7828 SSC | <<locked>> | 80% | 40,045 psi | 63% | 2858 fps | 95.5% |
| IMR 8133 Enduron | <<locked>> | 92% | 39,204 psi | 61% | 2838 fps | 95.7% |
| Lovex S070 | <<locked>> | 80% | 53,693 psi | 84% | 3041 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 35,621 psi | 56% | 2674 fps | 97.8% |
| Norma 204 | <<locked>> | 80% | 52,968 psi | 83% | 3061 fps | 99.4% |
| Norma 217 | <<locked>> | 88% | 34,098 psi | 53% | 2730 fps | 95.9% |
| Norma MRP | <<locked>> | 80% | 44,846 psi | 70% | 2963 fps | 99.1% |
| Norma URP | <<locked>> | 80% | 53,664 psi | 84% | 3058 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 40,030 psi | 63% | 2861 fps | 96% |
| Ramshot Hunter | <<locked>> | 80% | 53,011 psi | 83% | 3061 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 36,042 psi | 56% | 2730 fps | 96.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,631 psi | 45% | 1929 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 33,721 psi | 53% | 2740 fps | 96.4% |
| ReloadSwiss RS 80 | 91.4 gr | 88% | 42,583 psi | 67% | 2913 fps | 95.4% |
| Rottweil R 904 | <<locked>> | 80% | 46,963 psi | 74% | 2933 fps | 97.7% |
| Rottweil R 905 | <<locked>> | 80% | 45,556 psi | 71% | 2933 fps | 98.4% |
| Shooters World SW4350 | <<locked>> | 80% | 53,693 psi | 84% | 3041 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 45,223 psi | 71% | 2930 fps | 98.3% |
| Somchem S361 | <<locked>> | 80% | 48,240 psi | 76% | 2913 fps | 97.4% |
| Somchem S365 | <<locked>> | 80% | 51,532 psi | 81% | 3009 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 45,992 psi | 72% | 2910 fps | 99.1% |
| Vihtavuori N165 | <<locked>> | 80% | 40,103 psi | 63% | 2772 fps | 97.5% |
| Vihtavuori N555 | <<locked>> | 80% | 45,136 psi | 71% | 2920 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 44,541 psi | 70% | 2953 fps | 96.5% |
| Vihtavuori N565 | <<locked>> | 82% | 39,421 psi | 62% | 2812 fps | 95% |
| Vihtavuori N568 | 88.4 gr | 88% | 43,555 psi | 68% | 2933 fps | 95.1% |
| Vihtavuori N570 | <<locked>> | 94% | 51,851 psi | 81% | 3130 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 38,885 psi | 61% | 2874 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 42,409 psi | 66% | 2831 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 58 powders for 7 mm Rem. Ultra Mag. loaded with the .284 | 127gr | Hasler Hunting. Hodgdon Retumbo delivers the highest muzzle velocity at 3,268 fps; across all powders the maximum-charge window runs from 2,093 fps to 3,268 fps. ADI AR 2218 gives the best case fill at 100 %, and 58 of the 58 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 127.0 gr projectile in 0.284" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. ADI AR 2218, ADI AR 2225, Hodgdon TrailBoss 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 | 127gr | Hasler Hunting 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.