Load Specifications
Load data in caliber 7 mm Weath. Mag. with .284 | 153gr | Peregrine Glider GRM bullet and 83 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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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>> | 82% | 57,145 psi | 90% | 2877 fps | 99.5% |
| Accurate 3100 | <<locked>> | 98% | 56,637 psi | 89% | 2933 fps | 100% |
| Accurate 4064 | <<locked>> | 82% | 56,579 psi | 89% | 2848 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 54,607 psi | 86% | 2920 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 54,505 psi | 85% | 3025 fps | 98.2% |
| Accurate MAGPRO | <<locked>> | 96% | 55,361 psi | 87% | 3028 fps | 97.3% |
| ADI AR 2208 | <<locked>> | 84% | 56,811 psi | 89% | 2890 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 55,782 psi | 87% | 2972 fps | 99% |
| ADI AR 2213 | <<locked>> | 98% | 57,377 psi | 90% | 3035 fps | 98.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 39,291 psi | 62% | 2743 fps | 97.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 54,099 psi | 85% | 2858 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 55,840 psi | 88% | 2979 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 56,956 psi | 89% | 2995 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 55,332 psi | 87% | 2963 fps | 99% |
| Alliant Reloder-22 | <<locked>> | 98% | 56,826 psi | 89% | 3028 fps | 99.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 57,580 psi | 90% | 2995 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 49,632 psi | 78% | 2940 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 53,983 psi | 85% | 3031 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 55,680 psi | 87% | 3009 fps | 99.1% |
| Bofors RP3 | <<locked>> | 82% | 55,013 psi | 86% | 2874 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 45,513 psi | 71% | 2861 fps | 96.7% |
| Bofors RP5 | <<locked>> | 98% | 56,826 psi | 89% | 3028 fps | 99.3% |
| Bofors RP7 | <<locked>> | 86% | 54,215 psi | 85% | 2867 fps | 99.4% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 49,124 psi | 77% | 2890 fps | 97.8% |
| Hodgdon H380 | <<locked>> | 82% | 55,230 psi | 87% | 2894 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 56,811 psi | 89% | 2976 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 86% | 56,202 psi | 88% | 2936 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 96% | 57,348 psi | 90% | 2972 fps | 97.8% |
| Hodgdon H4831 SC | <<locked>> | 96% | 56,246 psi | 88% | 2956 fps | 97.7% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 56,014 psi | 88% | 2900 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 48,704 psi | 76% | 2995 fps | 99% |
| Hodgdon Superformance | <<locked>> | 88% | 57,392 psi | 90% | 3015 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,724 psi | 58% | 1821 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 56,057 psi | 88% | 2871 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 55,840 psi | 88% | 2910 fps | 99.6% |
| IMR 4451 Enduron | <<locked>> | 86% | 55,912 psi | 88% | 2897 fps | 99.7% |
| IMR 4831 | <<locked>> | 90% | 55,187 psi | 86% | 2910 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 54,882 psi | 86% | 2900 fps | 97.6% |
| IMR 7828 SSC | <<locked>> | 98% | 54,694 psi | 86% | 3005 fps | 98.1% |
| Lovex S062 | <<locked>> | 82% | 56,217 psi | 88% | 2858 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 56,202 psi | 88% | 2890 fps | 100% |
| Lovex S070 | <<locked>> | 90% | 57,696 psi | 90% | 2936 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 50,459 psi | 79% | 2838 fps | 99.7% |
| Norma 203B | <<locked>> | 82% | 57,246 psi | 90% | 2920 fps | 100% |
| Norma 204 | <<locked>> | 90% | 56,681 psi | 89% | 2963 fps | 99% |
| Norma MRP | <<locked>> | 96% | 56,492 psi | 89% | 3051 fps | 99.9% |
| Norma URP | <<locked>> | 90% | 56,971 psi | 89% | 2956 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 55,477 psi | 87% | 3028 fps | 98.6% |
| Ramshot Hunter | <<locked>> | 90% | 55,854 psi | 88% | 2963 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 53,330 psi | 84% | 2956 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,333 psi | 59% | 1864 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 55,230 psi | 87% | 2884 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 56,594 psi | 89% | 2986 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 54,694 psi | 86% | 2943 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 57,246 psi | 90% | 3035 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 49,037 psi | 77% | 2992 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 84% | 55,143 psi | 86% | 2871 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 57,116 psi | 90% | 2943 fps | 98.4% |
| Rottweil R 905 | <<locked>> | 94% | 54,636 psi | 86% | 2949 fps | 99% |
| Rottweil R 907 | <<locked>> | 86% | 54,215 psi | 85% | 2867 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 88% | 56,202 psi | 88% | 2890 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 56,217 psi | 88% | 2858 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 57,696 psi | 90% | 2936 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 56,898 psi | 89% | 2933 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 55,753 psi | 87% | 2753 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 55,796 psi | 87% | 2848 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 54,186 psi | 85% | 2946 fps | 99% |
| Somchem S355 | <<locked>> | 84% | 55,100 psi | 86% | 2867 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 55,129 psi | 86% | 2881 fps | 97.4% |
| Somchem S365 | <<locked>> | 92% | 56,942 psi | 89% | 2956 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 55,100 psi | 86% | 2923 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 86% | 56,449 psi | 88% | 2841 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 55,317 psi | 87% | 2897 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 54,476 psi | 85% | 2900 fps | 99.2% |
| Vihtavuori N540 | <<locked>> | 82% | 57,072 psi | 89% | 2838 fps | 100% |
| Vihtavuori N550 | <<locked>> | 88% | 54,375 psi | 85% | 2904 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 56,275 psi | 88% | 2972 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 56,492 psi | 89% | 3045 fps | 98% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 52,025 psi | 82% | 2953 fps | 97.4% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 54,853 psi | 86% | 2858 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 57,087 psi | 89% | 2979 fps | 99.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 54,592 psi | 86% | 3077 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 55,288 psi | 87% | 2920 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% | 53,563 psi | 84% | 2822 fps | 99.2% |
| Accurate 3100 | <<locked>> | 82% | 32,532 psi | 51% | 2474 fps | 95.9% |
| Accurate 4064 | <<locked>> | 80% | 53,200 psi | 83% | 2799 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 41,321 psi | 65% | 2687 fps | 99.5% |
| Accurate High Country | 63.5 gr | 88% | 44,077 psi | 69% | 2831 fps | 95.9% |
| Accurate MAGPRO | 67.6 gr | 92% | 48,022 psi | 75% | 2894 fps | 95.5% |
| ADI AR 2208 | <<locked>> | 80% | 50,111 psi | 79% | 2785 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 39,798 psi | 62% | 2674 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 90% | 43,569 psi | 68% | 2779 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 96% | 34,432 psi | 54% | 2615 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,894 psi | 80% | 2808 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,929 psi | 63% | 2697 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 46,035 psi | 72% | 2825 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 39,798 psi | 62% | 2671 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 88% | 40,292 psi | 63% | 2723 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,327 psi | 46% | 2448 fps | 98.1% |
| Alliant Reloder-25 | <<locked>> | 86% | 31,227 psi | 49% | 2520 fps | 95.9% |
| Alliant Reloder-26 | 59.4 gr | 80% | 31,589 psi | 50% | 2566 fps | 96.9% |
| Bofors RP15 | <<locked>> | 90% | 39,755 psi | 62% | 2710 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 51,459 psi | 81% | 2822 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 42,424 psi | 66% | 2799 fps | 95.8% |
| Bofors RP5 | <<locked>> | 88% | 40,292 psi | 63% | 2723 fps | 95.9% |
| Bofors RP7 | <<locked>> | 80% | 44,889 psi | 70% | 2703 fps | 98% |
| Hodgdon H1000 | <<locked>> | 96% | 42,714 psi | 67% | 2759 fps | 95.9% |
| Hodgdon H380 | <<locked>> | 80% | 51,677 psi | 81% | 2838 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 43,265 psi | 68% | 2736 fps | 98.2% |
| Hodgdon H4350 | <<locked>> | 80% | 46,151 psi | 72% | 2759 fps | 97.7% |
| Hodgdon H4831 | <<locked>> | 90% | 46,659 psi | 73% | 2789 fps | 95.5% |
| Hodgdon H4831 SC | <<locked>> | 90% | 45,745 psi | 72% | 2772 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,579 psi | 59% | 2585 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 92% | 37,144 psi | 58% | 2723 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 42,511 psi | 67% | 2756 fps | 97.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,340 psi | 43% | 1627 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 52,736 psi | 83% | 2818 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 40,466 psi | 63% | 2628 fps | 96.9% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,282 psi | 73% | 2730 fps | 98.6% |
| IMR 4831 | <<locked>> | 80% | 39,479 psi | 62% | 2635 fps | 99.3% |
| IMR 4955 Enduron | <<locked>> | 88% | 45,397 psi | 71% | 2730 fps | 95.4% |
| IMR 7828 SSC | <<locked>> | 92% | 44,672 psi | 70% | 2818 fps | 95.7% |
| Lovex S062 | <<locked>> | 80% | 52,924 psi | 83% | 2812 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 43,743 psi | 69% | 2677 fps | 99.1% |
| Lovex S070 | <<locked>> | 80% | 41,989 psi | 66% | 2661 fps | 98% |
| Lovex S071 | <<locked>> | 86% | 31,720 psi | 50% | 2451 fps | 95.5% |
| Norma 203B | <<locked>> | 80% | 53,635 psi | 84% | 2864 fps | 100% |
| Norma 204 | <<locked>> | 80% | 40,147 psi | 63% | 2657 fps | 95.5% |
| Norma MRP | <<locked>> | 82% | 34,098 psi | 53% | 2602 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 40,988 psi | 64% | 2680 fps | 99.4% |
| Ramshot Grand | <<locked>> | 90% | 41,379 psi | 65% | 2759 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 39,827 psi | 62% | 2671 fps | 98.1% |
| Ramshot Magnum | <<locked>> | 90% | 36,579 psi | 57% | 2628 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,949 psi | 44% | 1667 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,532 psi | 81% | 2825 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 48,892 psi | 77% | 2874 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 41,220 psi | 65% | 2707 fps | 99.3% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,842 psi | 62% | 2723 fps | 99.1% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 36,492 psi | 57% | 2707 fps | 96.3% |
| Rottweil R 903 | <<locked>> | 80% | 48,428 psi | 76% | 2766 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 44,179 psi | 69% | 2713 fps | 95.7% |
| Rottweil R 905 | <<locked>> | 84% | 38,856 psi | 61% | 2651 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 44,889 psi | 70% | 2703 fps | 98% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,743 psi | 69% | 2677 fps | 99.1% |
| Shooters World Precision | <<locked>> | 80% | 52,924 psi | 83% | 2812 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 41,989 psi | 66% | 2661 fps | 98% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,908 psi | 78% | 2825 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 49,255 psi | 77% | 2661 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,757 psi | 67% | 2621 fps | 98.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 38,508 psi | 60% | 2644 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 48,515 psi | 76% | 2766 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 45,049 psi | 71% | 2700 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 37,623 psi | 59% | 2638 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 36,869 psi | 58% | 2575 fps | 95.7% |
| Vihtavuori N150 | <<locked>> | 80% | 46,441 psi | 73% | 2690 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,409 psi | 66% | 2680 fps | 99.6% |
| Vihtavuori N165 | <<locked>> | 86% | 36,347 psi | 57% | 2556 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 80% | 53,563 psi | 84% | 2789 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 41,785 psi | 65% | 2680 fps | 99.4% |
| Vihtavuori N555 | <<locked>> | 80% | 32,721 psi | 51% | 2526 fps | 98.1% |
| Vihtavuori N560 | <<locked>> | 90% | 45,788 psi | 72% | 2851 fps | 95.6% |
| Vihtavuori N565 | <<locked>> | 96% | 45,353 psi | 71% | 2828 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,466 psi | 65% | 2644 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 43,468 psi | 68% | 2740 fps | 98.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,831 psi | 40% | 2431 fps | 97.6% |
| Winchester Supreme 780 | <<locked>> | 86% | 38,754 psi | 61% | 2615 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 90 powders for 7 mm Weath. Mag. loaded with the .284 | 153gr | Peregrine Glider GRM. Winchester StaBALL HD delivers the highest muzzle velocity at 3,077 fps; across all powders the maximum-charge window runs from 1,821 fps to 3,077 fps. ADI AR 2217 gives the best case fill at 100 %, and 90 of the 90 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 54–90 %, leaving at least 10 % headroom. The 153.0 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-23 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 | 153gr | Peregrine Glider GRM they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, IMR 8133 Enduron, ReloadSwiss RS 80, Vihtavuori N170 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.