Load Specifications
Load data in caliber 7 mm Rem. Ultra Mag. with .284 | 145gr | Peregrine Glider GRM bullet and 51 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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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>> | 86% | 54,172 psi | 85% | 2887 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 57,522 psi | 90% | 3051 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 84% | 55,477 psi | 87% | 2979 fps | 100% |
| ADI AR 2213 | <<locked>> | 86% | 54,070 psi | 85% | 2986 fps | 99.6% |
| ADI AR 2217 | <<locked>> | 96% | 57,261 psi | 90% | 3022 fps | 100% |
| ADI AR 2218 | <<locked>> | 98% | 54,070 psi | 85% | 3064 fps | 98% |
| ADI AR 2225 | <<locked>> | 98% | 56,507 psi | 89% | 3038 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 55,622 psi | 87% | 2972 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 55,042 psi | 86% | 2966 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 86% | 54,520 psi | 85% | 2982 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 88% | 56,536 psi | 89% | 2949 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 57,348 psi | 90% | 3022 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 57,319 psi | 90% | 3031 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 55,970 psi | 88% | 3048 fps | 98.1% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 55,753 psi | 87% | 3031 fps | 97.7% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 54,955 psi | 86% | 2946 fps | 98% |
| Bofors RP15 | <<locked>> | 88% | 53,969 psi | 85% | 2972 fps | 99.9% |
| Bofors RP30 | <<locked>> | 94% | 57,130 psi | 90% | 3035 fps | 99.9% |
| Bofors RP5 | <<locked>> | 86% | 54,520 psi | 85% | 2982 fps | 100% |
| Hodgdon H1000 | <<locked>> | 92% | 54,636 psi | 86% | 2982 fps | 100% |
| Hodgdon H4831 | <<locked>> | 86% | 57,043 psi | 89% | 2982 fps | 99.5% |
| Hodgdon H4831 SC | <<locked>> | 86% | 55,782 psi | 87% | 2963 fps | 99.4% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 55,477 psi | 87% | 2887 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 56,623 psi | 89% | 3107 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,550 psi | 59% | 1969 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 57,551 psi | 90% | 2953 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 57,261 psi | 90% | 2963 fps | 99.6% |
| IMR 7828 SSC | <<locked>> | 88% | 56,565 psi | 89% | 3031 fps | 99.8% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 55,376 psi | 87% | 3018 fps | 99.9% |
| Lovex S071 | <<locked>> | 92% | 56,043 psi | 88% | 2913 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 56,695 psi | 89% | 3038 fps | 100% |
| Norma MRP | <<locked>> | 84% | 54,679 psi | 86% | 2999 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 53,664 psi | 84% | 2989 fps | 99.7% |
| Ramshot Magnum | <<locked>> | 90% | 56,666 psi | 89% | 2979 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,493 psi | 60% | 2011 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 53,476 psi | 84% | 3028 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 57,116 psi | 90% | 3054 fps | 99.6% |
| Rottweil R 904 | <<locked>> | 84% | 56,028 psi | 88% | 2949 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 84% | 54,882 psi | 86% | 2959 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 54,505 psi | 85% | 2956 fps | 99.9% |
| Somchem S361 | <<locked>> | 84% | 57,595 psi | 90% | 2936 fps | 99.6% |
| Somchem S385 | <<locked>> | 84% | 55,129 psi | 86% | 2927 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 55,245 psi | 87% | 2910 fps | 100% |
| Vihtavuori N170 | <<locked>> | 92% | 54,708 psi | 86% | 2923 fps | 96.3% |
| Vihtavuori N555 | <<locked>> | 84% | 54,230 psi | 85% | 2923 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 54,114 psi | 85% | 2999 fps | 99.3% |
| Vihtavuori N565 | <<locked>> | 90% | 55,216 psi | 87% | 2989 fps | 99.6% |
| Vihtavuori N568 | <<locked>> | 94% | 57,435 psi | 90% | 3058 fps | 99.3% |
| Vihtavuori N570 | <<locked>> | 94% | 54,636 psi | 86% | 3054 fps | 97.5% |
| Winchester StaBALL HD | <<locked>> | 88% | 57,174 psi | 90% | 3031 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 55,114 psi | 86% | 2923 fps | 100% |
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% | 43,932 psi | 69% | 2723 fps | 99.9% |
| Accurate MAGPRO | <<locked>> | 80% | 46,064 psi | 72% | 2851 fps | 97.4% |
| ADI AR 2209 | <<locked>> | 80% | 48,370 psi | 76% | 2864 fps | 99.4% |
| ADI AR 2213 | <<locked>> | 80% | 43,598 psi | 68% | 2799 fps | 97.8% |
| ADI AR 2217 | <<locked>> | 82% | 34,577 psi | 54% | 2589 fps | 95.1% |
| ADI AR 2218 | <<locked>> | 94% | 46,340 psi | 73% | 2917 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 80% | 29,501 psi | 46% | 2484 fps | 95.8% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 48,704 psi | 76% | 2861 fps | 99.5% |
| Alliant Reloder-19 | <<locked>> | 80% | 48,211 psi | 76% | 2851 fps | 99.4% |
| Alliant Reloder-22 | <<locked>> | 80% | 44,280 psi | 69% | 2802 fps | 98.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 42,931 psi | 67% | 2743 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 37,173 psi | 58% | 2674 fps | 99.7% |
| Alliant Reloder-26 | <<locked>> | 80% | 49,197 psi | 77% | 2910 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 44,164 psi | 69% | 2831 fps | 95% |
| Alliant Reloder-50 | <<locked>> | 96% | 47,572 psi | 75% | 2884 fps | 95.5% |
| Baschieri & Pellagri 109 | <<locked>> | 82% | 44,918 psi | 70% | 2766 fps | 95.5% |
| Bofors RP15 | <<locked>> | 80% | 41,089 psi | 64% | 2736 fps | 98.1% |
| Bofors RP30 | <<locked>> | 80% | 34,563 psi | 54% | 2598 fps | 95.1% |
| Bofors RP5 | <<locked>> | 80% | 44,280 psi | 69% | 2802 fps | 98.9% |
| Hodgdon H1000 | <<locked>> | 80% | 35,099 psi | 55% | 2605 fps | 96% |
| Hodgdon H4831 | <<locked>> | 80% | 46,006 psi | 72% | 2795 fps | 97.8% |
| Hodgdon H4831 SC | <<locked>> | 80% | 45,324 psi | 71% | 2785 fps | 97.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 52,025 psi | 82% | 2841 fps | 100% |
| Hodgdon Retumbo | 74.1 gr | 80% | 36,289 psi | 57% | 2713 fps | 97.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,123 psi | 44% | 1768 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 53,969 psi | 85% | 2900 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 47,007 psi | 74% | 2792 fps | 98.2% |
| IMR 7828 SSC | <<locked>> | 80% | 42,264 psi | 66% | 2779 fps | 97.5% |
| IMR 8133 Enduron | <<locked>> | 88% | 36,042 psi | 56% | 2648 fps | 95.7% |
| Lovex S071 | <<locked>> | 80% | 37,594 psi | 59% | 2595 fps | 99.1% |
| Norma 217 | <<locked>> | 84% | 31,386 psi | 49% | 2543 fps | 95.9% |
| Norma MRP | <<locked>> | 80% | 47,268 psi | 74% | 2874 fps | 99.9% |
| Ramshot Grand | <<locked>> | 80% | 42,438 psi | 67% | 2789 fps | 97.9% |
| Ramshot Magnum | <<locked>> | 80% | 38,174 psi | 60% | 2657 fps | 98.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,877 psi | 45% | 1808 fps | 100% |
| ReloadSwiss RS 76 | 79.3 gr | 80% | 35,766 psi | 56% | 2684 fps | 98.6% |
| ReloadSwiss RS 80 | <<locked>> | 84% | 38,363 psi | 60% | 2703 fps | 95.1% |
| Rottweil R 904 | <<locked>> | 80% | 48,892 psi | 77% | 2831 fps | 98.9% |
| Rottweil R 905 | <<locked>> | 80% | 47,718 psi | 75% | 2841 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 47,384 psi | 74% | 2835 fps | 99.4% |
| Somchem S361 | <<locked>> | 80% | 50,212 psi | 79% | 2818 fps | 98.7% |
| Somchem S385 | <<locked>> | 80% | 48,153 psi | 75% | 2815 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 80% | 42,076 psi | 66% | 2687 fps | 98.9% |
| Vihtavuori N170 | <<locked>> | 90% | 51,053 psi | 80% | 2864 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 80% | 47,340 psi | 74% | 2818 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 46,876 psi | 73% | 2871 fps | 98.1% |
| Vihtavuori N565 | <<locked>> | 80% | 38,696 psi | 61% | 2677 fps | 96% |
| Vihtavuori N568 | <<locked>> | 86% | 42,612 psi | 67% | 2795 fps | 96.1% |
| Vihtavuori N570 | 86.5 gr | 90% | 47,065 psi | 74% | 2917 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 41,669 psi | 65% | 2795 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 44,367 psi | 70% | 2743 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 51 powders for 7 mm Rem. Ultra Mag. loaded with the .284 | 145gr | Peregrine Glider GRM. Hodgdon Retumbo delivers the highest muzzle velocity at 3,107 fps; across all powders the maximum-charge window runs from 1,969 fps to 3,107 fps. Alliant Reloder-50 gives the best case fill at 100 %, and 51 of the 51 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 145.0 gr projectile in 0.284" calls for a 1:8.5 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 | 145gr | Peregrine Glider GRM 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.