Load Specifications
Load data in caliber 7 mm Weath. Mag. with .284 | 166gr | Peregrine VRG-2 bullet and 76 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate MAGPRO, Accurate High Country 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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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 94% | 56,333 psi | 88% | 2831 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 57,696 psi | 90% | 2861 fps | 100% |
| Accurate High Country | <<locked>> | 90% | 54,447 psi | 85% | 2927 fps | 99.1% |
| Accurate MAGPRO | <<locked>> | 92% | 55,303 psi | 87% | 2930 fps | 98.3% |
| ADI AR 2209 | <<locked>> | 90% | 55,114 psi | 86% | 2871 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 94% | 56,666 psi | 89% | 2933 fps | 99.2% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 50,662 psi | 79% | 2831 fps | 98.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 45,208 psi | 71% | 2792 fps | 99.8% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 55,158 psi | 86% | 2867 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 86% | 55,288 psi | 87% | 2864 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 82% | 56,173 psi | 88% | 2874 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 54,505 psi | 85% | 2858 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 94% | 56,637 psi | 89% | 2927 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 94% | 54,317 psi | 85% | 2844 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 57,377 psi | 90% | 2956 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 54,346 psi | 85% | 2923 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 54,665 psi | 86% | 2838 fps | 96.5% |
| Bofors RP15 | <<locked>> | 96% | 55,521 psi | 87% | 2910 fps | 99.7% |
| Bofors RP30ᴾ | <<locked>> | 100% | 53,171 psi | 83% | 2900 fps | 99.2% |
| Bofors RP5 | <<locked>> | 94% | 56,637 psi | 89% | 2927 fps | 99.8% |
| Bofors RP7 | <<locked>> | 84% | 56,173 psi | 88% | 2808 fps | 99.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 56,043 psi | 88% | 2923 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 84% | 55,883 psi | 88% | 2864 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 54,868 psi | 86% | 2822 fps | 99.7% |
| Hodgdon H4831 | <<locked>> | 92% | 56,550 psi | 89% | 2874 fps | 98.7% |
| Hodgdon H4831 SC | <<locked>> | 92% | 55,259 psi | 87% | 2851 fps | 98.5% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 55,448 psi | 87% | 2789 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 56,246 psi | 88% | 3035 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 56,376 psi | 88% | 2900 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,130 psi | 58% | 1778 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 54,607 psi | 86% | 2802 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 84% | 57,725 psi | 90% | 2831 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 54,404 psi | 85% | 2802 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 57,246 psi | 90% | 2854 fps | 98.9% |
| IMR 7828 SSC | <<locked>> | 94% | 54,404 psi | 85% | 2910 fps | 99% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 40,567 psi | 64% | 2690 fps | 96.3% |
| Lovex S065 | <<locked>> | 84% | 54,781 psi | 86% | 2776 fps | 100% |
| Lovex S070 | <<locked>> | 86% | 56,724 psi | 89% | 2831 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 57,682 psi | 90% | 2851 fps | 100% |
| Norma 204 | <<locked>> | 86% | 55,593 psi | 87% | 2854 fps | 99.5% |
| Norma 217ᴾ | <<locked>> | 100% | 40,770 psi | 64% | 2717 fps | 98.5% |
| Norma MRP | <<locked>> | 92% | 56,550 psi | 89% | 2946 fps | 100% |
| Norma URP | <<locked>> | 86% | 56,347 psi | 88% | 2848 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 55,201 psi | 87% | 2933 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 86% | 55,187 psi | 86% | 2854 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 53,577 psi | 84% | 2867 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,000 psi | 60% | 1821 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 54,099 psi | 85% | 2831 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 56,492 psi | 89% | 2917 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 57,087 psi | 89% | 3031 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 51,924 psi | 81% | 2920 fps | 97.9% |
| Rottweil R 903 | <<locked>> | 82% | 57,740 psi | 90% | 2805 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 56,144 psi | 88% | 2838 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 90% | 53,969 psi | 85% | 2848 fps | 99.6% |
| Rottweil R 907 | <<locked>> | 84% | 56,173 psi | 88% | 2808 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 84% | 54,781 psi | 86% | 2776 fps | 100% |
| Shooters World SW4350 | <<locked>> | 86% | 56,724 psi | 89% | 2831 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 57,450 psi | 90% | 2674 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 57,740 psi | 90% | 2789 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 57,377 psi | 90% | 2900 fps | 99.8% |
| Somchem S355 | <<locked>> | 82% | 57,203 psi | 90% | 2795 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 57,667 psi | 90% | 2835 fps | 98.8% |
| Somchem S365 | <<locked>> | 88% | 56,768 psi | 89% | 2848 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 54,578 psi | 86% | 2822 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 82% | 55,027 psi | 86% | 2723 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 54,389 psi | 85% | 2785 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 54,012 psi | 85% | 2802 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 86% | 57,116 psi | 90% | 2841 fps | 100% |
| Vihtavuori N555 | <<locked>> | 92% | 56,318 psi | 88% | 2867 fps | 100% |
| Vihtavuori N560 | <<locked>> | 92% | 56,347 psi | 88% | 2946 fps | 98.9% |
| Vihtavuori N565 | <<locked>> | 98% | 56,144 psi | 88% | 2927 fps | 99% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 53,055 psi | 83% | 2923 fps | 97.6% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 57,667 psi | 90% | 2795 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 55,883 psi | 88% | 2864 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 96% | 56,246 psi | 88% | 2976 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 54,331 psi | 85% | 2815 fps | 99.5% |
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% | 34,911 psi | 55% | 2444 fps | 97.9% |
| Accurate 4350 | <<locked>> | 80% | 47,021 psi | 74% | 2697 fps | 100% |
| Accurate High Country | 60.7 gr | 80% | 38,101 psi | 60% | 2608 fps | 95.1% |
| Accurate MAGPRO | 66.5 gr | 86% | 44,672 psi | 70% | 2740 fps | 95.9% |
| ADI AR 2209 | <<locked>> | 80% | 39,334 psi | 62% | 2579 fps | 96.7% |
| ADI AR 2213 | <<locked>> | 84% | 40,016 psi | 63% | 2625 fps | 95.6% |
| ADI AR 2217 | <<locked>> | 92% | 38,667 psi | 61% | 2592 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 90% | 32,387 psi | 51% | 2487 fps | 96.1% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 39,711 psi | 62% | 2579 fps | 96.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 45,353 psi | 71% | 2707 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 52,373 psi | 82% | 2822 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 39,305 psi | 62% | 2572 fps | 96.7% |
| Alliant Reloder-22 | <<locked>> | 80% | 35,012 psi | 55% | 2510 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 33,692 psi | 53% | 2474 fps | 99.8% |
| Alliant Reloder-25 | <<locked>> | 80% | 29,254 psi | 46% | 2385 fps | 96.4% |
| Alliant Reloder-26 | 62.5 gr | 80% | 36,999 psi | 58% | 2612 fps | 99.4% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 51,198 psi | 80% | 2779 fps | 95.7% |
| Bofors RP15 | <<locked>> | 82% | 34,911 psi | 55% | 2507 fps | 95.1% |
| Bofors RP30 | <<locked>> | 90% | 37,492 psi | 59% | 2598 fps | 95.4% |
| Bofors RP5 | <<locked>> | 80% | 35,012 psi | 55% | 2510 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 49,588 psi | 78% | 2700 fps | 99.5% |
| Hodgdon H1000 | <<locked>> | 88% | 36,869 psi | 58% | 2552 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 80% | 48,820 psi | 77% | 2749 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 80% | 51,358 psi | 80% | 2766 fps | 99.4% |
| Hodgdon H4831 | <<locked>> | 84% | 42,801 psi | 67% | 2631 fps | 95.8% |
| Hodgdon H4831 SC | <<locked>> | 84% | 42,003 psi | 66% | 2615 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 42,598 psi | 67% | 2589 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 34,911 psi | 55% | 2589 fps | 95.9% |
| Hodgdon Superformance | <<locked>> | 80% | 48,617 psi | 76% | 2779 fps | 99.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,775 psi | 44% | 1588 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 45,165 psi | 71% | 2638 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 80% | 51,126 psi | 80% | 2730 fps | 99.8% |
| IMR 4831 | <<locked>> | 80% | 44,715 psi | 70% | 2644 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 41,684 psi | 65% | 2575 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 84% | 38,479 psi | 60% | 2602 fps | 95.1% |
| IMR 8133 Enduron | <<locked>> | 98% | 37,942 psi | 59% | 2631 fps | 95.4% |
| Lovex S065 | <<locked>> | 80% | 48,443 psi | 76% | 2677 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 46,688 psi | 73% | 2664 fps | 99.5% |
| Lovex S071 | <<locked>> | 80% | 29,892 psi | 47% | 2320 fps | 96% |
| Norma 204 | <<locked>> | 80% | 45,266 psi | 71% | 2677 fps | 98.1% |
| Norma 217 | <<locked>> | 94% | 33,112 psi | 52% | 2530 fps | 95.8% |
| Norma MRP | <<locked>> | 80% | 36,680 psi | 57% | 2579 fps | 97.4% |
| Norma URP | <<locked>> | 80% | 46,064 psi | 72% | 2684 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 38,189 psi | 60% | 2608 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 45,078 psi | 71% | 2684 fps | 99.7% |
| Ramshot Magnum | <<locked>> | 84% | 33,982 psi | 53% | 2487 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,442 psi | 45% | 1627 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 47,181 psi | 74% | 2723 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 45,455 psi | 71% | 2740 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 84% | 31,589 psi | 50% | 2490 fps | 95.4% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 44,338 psi | 69% | 2779 fps | 96% |
| Rottweil R 903 | <<locked>> | 80% | 53,911 psi | 84% | 2753 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 40,480 psi | 63% | 2556 fps | 95.9% |
| Rottweil R 905 | <<locked>> | 80% | 38,508 psi | 60% | 2556 fps | 96.7% |
| Rottweil R 907 | <<locked>> | 80% | 49,588 psi | 78% | 2700 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 48,443 psi | 76% | 2677 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 46,688 psi | 73% | 2664 fps | 99.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 53,940 psi | 85% | 2631 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 47,384 psi | 74% | 2625 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 38,189 psi | 60% | 2549 fps | 96.5% |
| Somchem S355 | <<locked>> | 80% | 53,766 psi | 84% | 2746 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 41,263 psi | 65% | 2549 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 43,337 psi | 68% | 2641 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 39,030 psi | 61% | 2539 fps | 97.6% |
| Vihtavuori N150 | <<locked>> | 80% | 51,430 psi | 81% | 2674 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 47,674 psi | 75% | 2680 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 33,852 psi | 53% | 2415 fps | 95.5% |
| Vihtavuori N550 | <<locked>> | 80% | 46,818 psi | 73% | 2680 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 37,710 psi | 59% | 2546 fps | 99.8% |
| Vihtavuori N560 | <<locked>> | 84% | 42,482 psi | 67% | 2694 fps | 95.9% |
| Vihtavuori N565 | <<locked>> | 88% | 39,639 psi | 62% | 2621 fps | 95.3% |
| Vihtavuori N568 | <<locked>> | 96% | 45,730 psi | 72% | 2792 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 46,760 psi | 73% | 2641 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 48,820 psi | 77% | 2749 fps | 99.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 29,863 psi | 47% | 2493 fps | 99.9% |
| Winchester Supreme 780 | <<locked>> | 80% | 35,679 psi | 56% | 2464 fps | 95.5% |
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 76 powders for 7 mm Weath. Mag. loaded with the .284 | 166gr | Peregrine VRG-2. Hodgdon Retumbo delivers the highest muzzle velocity at 3,035 fps; across all powders the maximum-charge window runs from 1,778 fps to 3,035 fps. ADI AR 2217 gives the best case fill at 100 %, and 76 of the 76 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 166.0 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. Accurate MAGPRO, Accurate High Country, Alliant Reloder-26 rank at the top here: for 7 mm Weath. Mag. with the .284 | 166gr | Peregrine VRG-2 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.