Load Specifications
Load data in caliber 7 mm Rem. Mag. with .284 | 158gr | Prvi Partizan Grom bullet and 78 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N560, Norma MRP and Alliant Reloder-26.
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 2700 | <<locked>> | 84% | 56,231 psi | 90% | 2792 fps | 99.5% |
| Accurate 3100 | <<locked>> | 96% | 54,824 psi | 88% | 2844 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 56,260 psi | 90% | 2881 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 53,693 psi | 86% | 2930 fps | 96.3% |
| ADI AR 2208 | <<locked>> | 82% | 54,520 psi | 87% | 2795 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 53,432 psi | 86% | 2877 fps | 98.8% |
| ADI AR 2213 | <<locked>> | 96% | 54,839 psi | 88% | 2936 fps | 98.2% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 45,687 psi | 73% | 2762 fps | 96.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 40,538 psi | 65% | 2720 fps | 98.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 55,622 psi | 89% | 2818 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 53,548 psi | 86% | 2884 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 54,549 psi | 87% | 2900 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 52,910 psi | 85% | 2864 fps | 98.8% |
| Alliant Reloder-22 | <<locked>> | 96% | 54,549 psi | 87% | 2933 fps | 99.1% |
| Alliant Reloder-23 | <<locked>> | 98% | 55,506 psi | 89% | 2907 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 51,126 psi | 82% | 2907 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 55,854 psi | 90% | 2999 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 53,447 psi | 86% | 2913 fps | 98.9% |
| Bofors RP30ᴾ | <<locked>> | 100% | 47,137 psi | 76% | 2835 fps | 97.3% |
| Bofors RP5 | <<locked>> | 96% | 54,549 psi | 87% | 2933 fps | 99.1% |
| Bofors RP7 | <<locked>> | 86% | 55,564 psi | 89% | 2828 fps | 99.6% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 46,934 psi | 75% | 2792 fps | 97.4% |
| Hodgdon H414 | <<locked>> | 84% | 55,535 psi | 89% | 2894 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 88% | 55,724 psi | 89% | 2867 fps | 99.3% |
| Hodgdon H4831 | <<locked>> | 98% | 53,998 psi | 87% | 2861 fps | 97.4% |
| Hodgdon H4831 SC | <<locked>> | 94% | 53,708 psi | 86% | 2858 fps | 97.3% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 53,867 psi | 86% | 2808 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 50,009 psi | 80% | 2963 fps | 99.3% |
| Hodgdon Superformance | <<locked>> | 86% | 54,650 psi | 88% | 2917 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,898 psi | 59% | 1781 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 53,476 psi | 86% | 2769 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 55,332 psi | 89% | 2802 fps | 99.7% |
| IMR 4350 | <<locked>> | 88% | 53,490 psi | 86% | 2812 fps | 99.4% |
| IMR 4451 Enduron | <<locked>> | 84% | 53,795 psi | 86% | 2802 fps | 99.6% |
| IMR 4831 | <<locked>> | 92% | 54,317 psi | 87% | 2838 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 56,202 psi | 90% | 2861 fps | 97.9% |
| IMR 7828 SSC | <<locked>> | 94% | 52,634 psi | 84% | 2910 fps | 97.9% |
| Lovex S065 | <<locked>> | 86% | 54,114 psi | 87% | 2802 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 55,666 psi | 89% | 2848 fps | 99.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 52,156 psi | 84% | 2805 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 54,288 psi | 87% | 2864 fps | 98.8% |
| Norma MRP | <<locked>> | 94% | 54,259 psi | 87% | 2953 fps | 99.8% |
| Norma URP | <<locked>> | 88% | 54,839 psi | 88% | 2864 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 56,246 psi | 90% | 2979 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 88% | 53,664 psi | 86% | 2867 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 96% | 52,939 psi | 85% | 2894 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,579 psi | 60% | 1821 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 56,333 psi | 90% | 2841 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 54,012 psi | 87% | 2887 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 56,289 psi | 90% | 2907 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 54,418 psi | 87% | 2930 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 50,415 psi | 81% | 2959 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 82% | 53,345 psi | 86% | 2782 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 54,969 psi | 88% | 2848 fps | 98.2% |
| Rottweil R 905 | <<locked>> | 94% | 55,941 psi | 90% | 2910 fps | 99.2% |
| Rottweil R 907 | <<locked>> | 86% | 55,564 psi | 89% | 2828 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 86% | 54,114 psi | 87% | 2802 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 55,666 psi | 89% | 2848 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 54,694 psi | 88% | 2841 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 53,650 psi | 86% | 2664 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 53,417 psi | 86% | 2753 fps | 99.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 55,492 psi | 89% | 2907 fps | 99.2% |
| Somchem S355 | <<locked>> | 82% | 53,185 psi | 85% | 2776 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 52,953 psi | 85% | 2785 fps | 97.1% |
| Somchem S365 | <<locked>> | 90% | 54,984 psi | 88% | 2867 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 52,939 psi | 85% | 2828 fps | 99.3% |
| Unknown powder | <<locked>> | 86% | 55,187 psi | 88% | 2867 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 54,926 psi | 88% | 2762 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 55,535 psi | 89% | 2838 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 54,085 psi | 87% | 2835 fps | 99.3% |
| Vihtavuori N550 | <<locked>> | 86% | 56,144 psi | 90% | 2884 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 54,375 psi | 87% | 2884 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 54,781 psi | 88% | 2959 fps | 97.8% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 53,650 psi | 86% | 2920 fps | 97.8% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 56,318 psi | 90% | 2822 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 55,535 psi | 89% | 2894 fps | 99.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 56,420 psi | 90% | 3041 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 54,244 psi | 87% | 2844 fps | 98.9% |
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 2700 | <<locked>> | 80% | 49,414 psi | 79% | 2684 fps | 98.8% |
| Accurate 3100 | <<locked>> | 80% | 31,836 psi | 51% | 2402 fps | 95.8% |
| Accurate 4350 | <<locked>> | 80% | 42,888 psi | 69% | 2657 fps | 99.7% |
| Accurate MAGPRO | <<locked>> | 94% | 50,154 psi | 80% | 2871 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 51,068 psi | 82% | 2743 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 38,479 psi | 62% | 2585 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 90% | 44,846 psi | 72% | 2753 fps | 95.8% |
| ADI AR 2217 | <<locked>> | 98% | 42,830 psi | 69% | 2703 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 94% | 33,446 psi | 54% | 2536 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 52,098 psi | 84% | 2766 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 41,205 psi | 66% | 2667 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 47,427 psi | 76% | 2789 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 38,392 psi | 62% | 2582 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 86% | 38,885 psi | 62% | 2635 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,690 psi | 49% | 2434 fps | 98.8% |
| Alliant Reloder-25 | <<locked>> | 84% | 30,443 psi | 49% | 2444 fps | 95.7% |
| Alliant Reloder-26 | 58.2 gr | 80% | 33,112 psi | 53% | 2556 fps | 97.7% |
| Bofors RP15 | <<locked>> | 88% | 38,551 psi | 62% | 2625 fps | 95.3% |
| Bofors RP30 | <<locked>> | 96% | 41,234 psi | 66% | 2717 fps | 95.6% |
| Bofors RP5 | <<locked>> | 86% | 38,885 psi | 62% | 2635 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 46,050 psi | 74% | 2667 fps | 98.3% |
| Hodgdon H1000 | <<locked>> | 96% | 41,060 psi | 66% | 2667 fps | 95.5% |
| Hodgdon H414 | <<locked>> | 80% | 48,370 psi | 78% | 2776 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 80% | 43,642 psi | 70% | 2654 fps | 97.2% |
| Hodgdon H4831 | <<locked>> | 92% | 44,556 psi | 71% | 2694 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 90% | 47,050 psi | 75% | 2743 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 38,943 psi | 62% | 2559 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 92% | 38,551 psi | 62% | 2707 fps | 96.1% |
| Hodgdon Superformance | <<locked>> | 80% | 43,816 psi | 70% | 2726 fps | 98.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,543 psi | 44% | 1591 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 50,285 psi | 81% | 2720 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,994 psi | 79% | 2697 fps | 99.2% |
| IMR 4350 | <<locked>> | 80% | 41,524 psi | 67% | 2595 fps | 97.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 47,471 psi | 76% | 2694 fps | 98.9% |
| IMR 4831 | <<locked>> | 80% | 37,188 psi | 60% | 2530 fps | 99% |
| IMR 4955 Enduron | <<locked>> | 86% | 43,714 psi | 70% | 2641 fps | 95% |
| IMR 7828 SSC | <<locked>> | 88% | 42,989 psi | 69% | 2726 fps | 95.4% |
| Lovex S065 | <<locked>> | 80% | 45,136 psi | 72% | 2648 fps | 99.4% |
| Lovex S070 | <<locked>> | 80% | 43,265 psi | 69% | 2631 fps | 98.4% |
| Lovex S071 | <<locked>> | 84% | 31,183 psi | 50% | 2385 fps | 95.5% |
| Norma 204 | <<locked>> | 80% | 41,394 psi | 66% | 2628 fps | 96% |
| Norma MRP | 57.9 gr | 82% | 35,534 psi | 57% | 2585 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 42,192 psi | 68% | 2648 fps | 99.6% |
| Ramshot Grand | <<locked>> | 86% | 41,814 psi | 67% | 2713 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 41,104 psi | 66% | 2641 fps | 98.5% |
| Ramshot Magnum | <<locked>> | 86% | 36,390 psi | 58% | 2572 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,224 psi | 45% | 1631 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 52,808 psi | 85% | 2785 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 50,314 psi | 81% | 2835 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 42,714 psi | 68% | 2677 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 41,176 psi | 66% | 2694 fps | 99.4% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 35,317 psi | 57% | 2621 fps | 95.9% |
| Rottweil R 903 | <<locked>> | 80% | 49,835 psi | 80% | 2730 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 42,467 psi | 68% | 2625 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 82% | 37,695 psi | 60% | 2569 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 80% | 46,050 psi | 74% | 2667 fps | 98.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 45,136 psi | 72% | 2648 fps | 99.4% |
| Shooters World SW4350 | <<locked>> | 80% | 43,265 psi | 69% | 2631 fps | 98.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 51,198 psi | 82% | 2785 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 50,401 psi | 81% | 2618 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,961 psi | 70% | 2589 fps | 98.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 37,347 psi | 60% | 2562 fps | 95.1% |
| Somchem S355 | <<locked>> | 80% | 50,024 psi | 80% | 2730 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 46,354 psi | 74% | 2674 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 38,986 psi | 63% | 2608 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 35,766 psi | 57% | 2497 fps | 95.5% |
| Unknown powder | <<locked>> | 80% | 45,281 psi | 73% | 2703 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 80% | 42,960 psi | 69% | 2575 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 45,382 psi | 73% | 2674 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 86% | 36,666 psi | 59% | 2510 fps | 95.4% |
| Vihtavuori N550 | <<locked>> | 80% | 46,064 psi | 74% | 2720 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 80% | 34,316 psi | 55% | 2510 fps | 98.7% |
| Vihtavuori N560 | 62.2 gr | 90% | 44,599 psi | 72% | 2772 fps | 95.4% |
| Vihtavuori N565 | <<locked>> | 94% | 43,656 psi | 70% | 2740 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 42,583 psi | 68% | 2608 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 48,370 psi | 78% | 2776 fps | 99.1% |
| Winchester StaBALL HD | <<locked>> | 80% | 27,137 psi | 44% | 2428 fps | 98.5% |
| Winchester Supreme 780 | <<locked>> | 82% | 38,058 psi | 61% | 2546 fps | 95.2% |
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 78 powders for 7 mm Rem. Mag. loaded with the .284 | 158gr | Prvi Partizan Grom. Winchester StaBALL HD delivers the highest muzzle velocity at 3,041 fps; across all powders the maximum-charge window runs from 1,781 fps to 3,041 fps. ADI AR 2217 gives the best case fill at 100 %, and 78 of the 78 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 158.0 gr projectile in 0.284" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-25 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 N560, Norma MRP, Alliant Reloder-26 rank at the top here: for 7 mm Rem. Mag. with the .284 | 158gr | Prvi Partizan Grom 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.