Load Specifications
Load data in caliber 7 mm Weath. Mag. with .284 | 160gr | Peregrine Glider GRM bullet and 84 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Vihtavuori N560 and Ramshot Grand.
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>> | 96% | 54,375 psi | 85% | 2841 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 56,304 psi | 88% | 2881 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 56,275 psi | 88% | 2995 fps | 98.8% |
| Accurate MAGPRO | <<locked>> | 96% | 57,246 psi | 90% | 2999 fps | 98% |
| ADI AR 2208 | <<locked>> | 82% | 54,418 psi | 85% | 2792 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 57,276 psi | 90% | 2940 fps | 99.4% |
| ADI AR 2213 | <<locked>> | 96% | 54,752 psi | 86% | 2936 fps | 98.4% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 45,672 psi | 72% | 2766 fps | 96.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 40,364 psi | 63% | 2720 fps | 98.4% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 57,537 psi | 90% | 2936 fps | 99.5% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 57,537 psi | 90% | 2936 fps | 99.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 55,419 psi | 87% | 2815 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 57,276 psi | 90% | 2936 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 54,636 psi | 86% | 2897 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 56,782 psi | 89% | 2927 fps | 99.4% |
| Alliant Reloder-22 | <<locked>> | 96% | 54,447 psi | 85% | 2930 fps | 99.3% |
| Alliant Reloder-23 | <<locked>> | 98% | 55,434 psi | 87% | 2904 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 51,242 psi | 80% | 2907 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 55,970 psi | 88% | 2995 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 98% | 56,971 psi | 89% | 2897 fps | 96.1% |
| Bofors RP15ᴾ | <<locked>> | 100% | 57,130 psi | 90% | 2972 fps | 99.5% |
| Bofors RP3 | <<locked>> | 82% | 56,478 psi | 89% | 2831 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 47,181 psi | 74% | 2838 fps | 97.6% |
| Bofors RP5 | <<locked>> | 96% | 54,447 psi | 85% | 2930 fps | 99.3% |
| Bofors RP7 | <<locked>> | 86% | 55,550 psi | 87% | 2828 fps | 99.7% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 50,357 psi | 79% | 2858 fps | 98.4% |
| Hodgdon H380 | <<locked>> | 82% | 56,637 psi | 89% | 2854 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 54,462 psi | 85% | 2881 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 86% | 57,406 psi | 90% | 2894 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 94% | 54,998 psi | 86% | 2881 fps | 97.9% |
| Hodgdon H4831 SC | <<locked>> | 96% | 57,479 psi | 90% | 2920 fps | 98.3% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 57,421 psi | 90% | 2854 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 50,053 psi | 78% | 2963 fps | 99.5% |
| Hodgdon Superformance | <<locked>> | 86% | 54,897 psi | 86% | 2917 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,854 psi | 58% | 1781 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 57,305 psi | 90% | 2825 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 57,072 psi | 89% | 2871 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 86% | 57,217 psi | 90% | 2858 fps | 99.9% |
| IMR 4831 | <<locked>> | 90% | 56,565 psi | 89% | 2871 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 56,159 psi | 88% | 2864 fps | 98.2% |
| IMR 7828 SSC | <<locked>> | 98% | 56,362 psi | 88% | 2972 fps | 98.7% |
| Lovex S062 | <<locked>> | 82% | 57,493 psi | 90% | 2815 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 57,348 psi | 90% | 2848 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 55,492 psi | 87% | 2844 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 51,967 psi | 81% | 2805 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 54,273 psi | 85% | 2867 fps | 99% |
| Norma 217ᴾ | <<locked>> | 100% | 35,737 psi | 56% | 2635 fps | 96.1% |
| Norma MRP | <<locked>> | 94% | 54,389 psi | 85% | 2956 fps | 99.9% |
| Norma URP | <<locked>> | 88% | 54,795 psi | 86% | 2864 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 57,043 psi | 89% | 2995 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 90% | 57,305 psi | 90% | 2923 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 55,303 psi | 87% | 2930 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,507 psi | 59% | 1821 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 56,318 psi | 88% | 2841 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 54,215 psi | 85% | 2887 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 56,202 psi | 88% | 2904 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 54,737 psi | 86% | 2933 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 50,575 psi | 79% | 2966 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 84% | 56,594 psi | 89% | 2828 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 54,984 psi | 86% | 2851 fps | 98.4% |
| Rottweil R 905 | <<locked>> | 94% | 56,130 psi | 88% | 2913 fps | 99.4% |
| Rottweil R 907 | <<locked>> | 86% | 55,550 psi | 87% | 2828 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 88% | 57,348 psi | 90% | 2848 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 57,493 psi | 90% | 2815 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 55,492 psi | 87% | 2844 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 54,708 psi | 86% | 2838 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 56,942 psi | 89% | 2703 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 56,927 psi | 89% | 2805 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 55,680 psi | 87% | 2910 fps | 99.4% |
| Somchem S355 | <<locked>> | 84% | 56,434 psi | 88% | 2825 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 56,536 psi | 89% | 2844 fps | 98.1% |
| Somchem S365 | <<locked>> | 90% | 54,911 psi | 86% | 2867 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 56,594 psi | 89% | 2887 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 86% | 57,580 psi | 90% | 2795 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 56,884 psi | 89% | 2858 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 56,057 psi | 88% | 2864 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 88% | 55,927 psi | 88% | 2864 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 57,696 psi | 90% | 2930 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 54,418 psi | 85% | 2949 fps | 98% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 53,577 psi | 84% | 2920 fps | 98.1% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 56,289 psi | 88% | 2818 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 54,737 psi | 86% | 2884 fps | 99.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 56,768 psi | 89% | 3041 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 56,608 psi | 89% | 2881 fps | 99.3% |
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% | 31,299 psi | 49% | 2392 fps | 95.9% |
| Accurate 4350 | <<locked>> | 80% | 42,598 psi | 67% | 2654 fps | 99.8% |
| Accurate High Country | <<locked>> | 86% | 42,163 psi | 66% | 2736 fps | 95.8% |
| Accurate MAGPRO | <<locked>> | 90% | 46,050 psi | 72% | 2802 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 51,184 psi | 80% | 2743 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 38,189 psi | 60% | 2585 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 88% | 41,713 psi | 65% | 2690 fps | 95.2% |
| ADI AR 2217 | <<locked>> | 98% | 42,786 psi | 67% | 2707 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 94% | 33,185 psi | 52% | 2536 fps | 95.4% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 38,464 psi | 60% | 2585 fps | 95.6% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 38,464 psi | 60% | 2585 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 52,112 psi | 82% | 2762 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 41,017 psi | 64% | 2664 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 47,485 psi | 74% | 2789 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 38,101 psi | 60% | 2579 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 86% | 38,696 psi | 61% | 2631 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,226 psi | 47% | 2425 fps | 98.9% |
| Alliant Reloder-25 | <<locked>> | 84% | 30,095 psi | 47% | 2441 fps | 95.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 32,764 psi | 51% | 2549 fps | 97.9% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 53,621 psi | 84% | 2841 fps | 95.3% |
| Bofors RP15 | <<locked>> | 88% | 38,363 psi | 60% | 2625 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 52,765 psi | 83% | 2779 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 40,915 psi | 64% | 2713 fps | 95.9% |
| Bofors RP5 | <<locked>> | 86% | 38,696 psi | 61% | 2631 fps | 95.9% |
| Bofors RP7 | <<locked>> | 80% | 45,934 psi | 72% | 2667 fps | 98.5% |
| Hodgdon H1000 | <<locked>> | 94% | 40,988 psi | 64% | 2671 fps | 95.9% |
| Hodgdon H380 | <<locked>> | 80% | 52,997 psi | 83% | 2799 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 44,512 psi | 70% | 2707 fps | 98.7% |
| Hodgdon H4350 | <<locked>> | 80% | 47,326 psi | 74% | 2726 fps | 98.3% |
| Hodgdon H4831 | <<locked>> | 88% | 44,686 psi | 70% | 2700 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 88% | 43,830 psi | 69% | 2680 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 38,667 psi | 61% | 2552 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 35,940 psi | 56% | 2641 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 43,714 psi | 69% | 2723 fps | 98.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,586 psi | 43% | 1591 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 53,882 psi | 84% | 2776 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 41,495 psi | 65% | 2598 fps | 97.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 47,311 psi | 74% | 2694 fps | 99.1% |
| IMR 4831 | <<locked>> | 80% | 40,625 psi | 64% | 2602 fps | 99.6% |
| IMR 4955 Enduron | <<locked>> | 86% | 43,642 psi | 68% | 2644 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 90% | 42,844 psi | 67% | 2726 fps | 95.7% |
| Lovex S062 | <<locked>> | 80% | 54,099 psi | 85% | 2766 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 44,759 psi | 70% | 2641 fps | 99.5% |
| Lovex S070 | <<locked>> | 80% | 43,033 psi | 67% | 2628 fps | 98.6% |
| Lovex S071 | <<locked>> | 84% | 30,661 psi | 48% | 2375 fps | 95.6% |
| Norma 204 | <<locked>> | 80% | 41,307 psi | 65% | 2631 fps | 96.4% |
| Norma 217 | <<locked>> | 98% | 33,489 psi | 52% | 2575 fps | 95% |
| Norma MRP | 57.2 gr | 80% | 32,866 psi | 52% | 2520 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 42,090 psi | 66% | 2648 fps | 99.7% |
| Ramshot Grand | 62.4 gr | 88% | 39,726 psi | 62% | 2671 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 41,002 psi | 64% | 2641 fps | 98.7% |
| Ramshot Magnum | <<locked>> | 88% | 35,128 psi | 55% | 2546 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,036 psi | 44% | 1627 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 52,794 psi | 83% | 2785 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 50,444 psi | 79% | 2831 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 42,511 psi | 67% | 2677 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 40,843 psi | 64% | 2687 fps | 99.5% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 35,041 psi | 55% | 2618 fps | 96.2% |
| Rottweil R 903 | <<locked>> | 80% | 49,676 psi | 78% | 2726 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 42,395 psi | 66% | 2625 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 82% | 37,304 psi | 58% | 2562 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 45,934 psi | 72% | 2667 fps | 98.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 44,759 psi | 70% | 2641 fps | 99.5% |
| Shooters World Precision | <<locked>> | 80% | 54,099 psi | 85% | 2766 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 43,033 psi | 67% | 2628 fps | 98.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 51,198 psi | 80% | 2785 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 50,270 psi | 79% | 2615 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,787 psi | 69% | 2592 fps | 98.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 36,970 psi | 58% | 2556 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 49,676 psi | 78% | 2723 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 43,265 psi | 68% | 2615 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 38,856 psi | 61% | 2605 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 35,447 psi | 56% | 2490 fps | 95.7% |
| Vihtavuori N150 | <<locked>> | 80% | 47,529 psi | 74% | 2651 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 43,569 psi | 68% | 2644 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 84% | 34,983 psi | 55% | 2477 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 42,917 psi | 67% | 2648 fps | 99.7% |
| Vihtavuori N555 | <<locked>> | 80% | 33,808 psi | 53% | 2500 fps | 98.8% |
| Vihtavuori N560 | 62.9 gr | 88% | 44,034 psi | 69% | 2762 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 94% | 43,526 psi | 68% | 2736 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 42,496 psi | 67% | 2608 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 44,715 psi | 70% | 2710 fps | 98.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,687 psi | 42% | 2421 fps | 98.6% |
| Winchester Supreme 780 | <<locked>> | 84% | 37,101 psi | 58% | 2530 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 84 powders for 7 mm Weath. Mag. loaded with the .284 | 160gr | Peregrine Glider GRM. 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 84 of the 84 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 160.0 gr projectile in 0.284" calls for a 1:8.0 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. Norma MRP, Vihtavuori N560, Ramshot Grand rank at the top here: for 7 mm Weath. Mag. with the .284 | 160gr | 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.