Load Specifications
Load data in caliber 7 mm Weath. Mag. with .284 | 145gr | Peregrine Glider GRM bullet and 89 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 ReloadSwiss RS 70.
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% | 55,912 psi | 88% | 2930 fps | 99.2% |
| Accurate 3100 | <<locked>> | 98% | 54,926 psi | 86% | 2979 fps | 99.9% |
| Accurate 4064 | <<locked>> | 82% | 55,042 psi | 86% | 2904 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 56,811 psi | 89% | 3025 fps | 100% |
| Accurate High Country | <<locked>> | 96% | 56,536 psi | 89% | 3133 fps | 98.2% |
| Accurate MAGPRO | <<locked>> | 98% | 57,624 psi | 90% | 3133 fps | 97.2% |
| ADI AR 2208 | <<locked>> | 84% | 55,477 psi | 87% | 2946 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 54,114 psi | 85% | 3018 fps | 98.4% |
| ADI AR 2213 | <<locked>> | 98% | 55,477 psi | 87% | 3074 fps | 97.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 38,072 psi | 60% | 2769 fps | 96.4% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 54,389 psi | 85% | 3018 fps | 98.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 56,260 psi | 88% | 2966 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 56,449 psi | 88% | 2989 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 53,969 psi | 85% | 3031 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 55,230 psi | 87% | 3048 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 57,319 psi | 90% | 3068 fps | 98.9% |
| Alliant Reloder-22 | <<locked>> | 98% | 54,853 psi | 86% | 3068 fps | 98.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 55,811 psi | 87% | 3051 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 48,095 psi | 75% | 2982 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 96% | 56,144 psi | 88% | 3140 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 53,751 psi | 84% | 3048 fps | 98.5% |
| Bofors RP3 | <<locked>> | 84% | 57,145 psi | 90% | 2982 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 54,853 psi | 86% | 3068 fps | 98.7% |
| Bofors RP7 | <<locked>> | 88% | 56,304 psi | 88% | 2972 fps | 99.3% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 47,645 psi | 75% | 2923 fps | 96.8% |
| Hodgdon H380 | <<locked>> | 84% | 57,609 psi | 90% | 3005 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 55,245 psi | 87% | 3025 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 86% | 54,578 psi | 86% | 2979 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 96% | 55,811 psi | 87% | 3018 fps | 97.1% |
| Hodgdon H4831 SC | <<locked>> | 96% | 54,476 psi | 85% | 2995 fps | 96.8% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 54,389 psi | 85% | 2953 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 47,152 psi | 74% | 3028 fps | 98.1% |
| Hodgdon Superformance | <<locked>> | 88% | 55,724 psi | 87% | 3064 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,593 psi | 57% | 1873 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 54,737 psi | 86% | 2927 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 57,072 psi | 89% | 2963 fps | 99.6% |
| IMR 4350 | <<locked>> | 90% | 54,201 psi | 85% | 2956 fps | 99.1% |
| IMR 4451 Enduron | <<locked>> | 86% | 54,723 psi | 86% | 2949 fps | 99.4% |
| IMR 4831 | <<locked>> | 92% | 57,290 psi | 90% | 3018 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 56,942 psi | 89% | 3002 fps | 97.5% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 56,913 psi | 89% | 3110 fps | 98% |
| Lovex S062 | <<locked>> | 82% | 54,853 psi | 86% | 2917 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 54,679 psi | 86% | 2943 fps | 99.9% |
| Lovex S070 | <<locked>> | 90% | 56,260 psi | 88% | 2989 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 48,747 psi | 76% | 2877 fps | 99.4% |
| Norma 203B | <<locked>> | 82% | 55,753 psi | 87% | 2972 fps | 100% |
| Norma 204 | <<locked>> | 90% | 55,056 psi | 86% | 3009 fps | 98.4% |
| Norma MRP | <<locked>> | 96% | 54,607 psi | 86% | 3094 fps | 99.5% |
| Norma URP | <<locked>> | 90% | 55,390 psi | 87% | 3012 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 56,739 psi | 89% | 3002 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 57,653 psi | 90% | 3133 fps | 98.5% |
| Ramshot Hunter | <<locked>> | 90% | 54,201 psi | 85% | 3009 fps | 99.8% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 51,692 psi | 81% | 2999 fps | 98.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,173 psi | 58% | 1916 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 57,261 psi | 90% | 2986 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 54,839 psi | 86% | 3041 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 56,898 psi | 89% | 3051 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 55,347 psi | 87% | 3081 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 47,297 psi | 74% | 3022 fps | 99% |
| Rottweil R 902 | <<locked>> | 82% | 56,666 psi | 89% | 2927 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 57,276 psi | 90% | 2979 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 55,840 psi | 88% | 2992 fps | 97.8% |
| Rottweil R 905 | <<locked>> | 96% | 56,666 psi | 89% | 3051 fps | 98.9% |
| Rottweil R 907 | <<locked>> | 88% | 56,304 psi | 88% | 2972 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 88% | 54,679 psi | 86% | 2943 fps | 99.9% |
| Shooters World Precision | <<locked>> | 82% | 54,853 psi | 86% | 2917 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 56,260 psi | 88% | 2989 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 55,463 psi | 87% | 2989 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 54,505 psi | 85% | 2808 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 54,244 psi | 85% | 2894 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 56,202 psi | 88% | 3048 fps | 98.9% |
| Somchem S355 | <<locked>> | 86% | 57,232 psi | 90% | 2976 fps | 100% |
| Somchem S361 | <<locked>> | 94% | 57,551 psi | 90% | 2982 fps | 97.4% |
| Somchem S365 | <<locked>> | 92% | 55,114 psi | 86% | 3012 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 57,087 psi | 89% | 3025 fps | 99.4% |
| Vihtavuori N135 | <<locked>> | 82% | 57,450 psi | 90% | 2884 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 57,682 psi | 90% | 2900 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 54,882 psi | 86% | 2897 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 57,537 psi | 90% | 3005 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 56,666 psi | 89% | 3002 fps | 99.2% |
| Vihtavuori N540 | <<locked>> | 82% | 55,608 psi | 87% | 2894 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 56,652 psi | 89% | 3012 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 54,375 psi | 85% | 3022 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 54,752 psi | 86% | 3084 fps | 97.2% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 50,241 psi | 79% | 2989 fps | 96.5% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 57,377 psi | 90% | 2966 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 55,463 psi | 87% | 3028 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 52,156 psi | 82% | 3123 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 57,334 psi | 90% | 3018 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% | 52,199 psi | 82% | 2867 fps | 98.7% |
| Accurate 3100 | <<locked>> | 84% | 33,692 psi | 53% | 2562 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 51,793 psi | 81% | 2854 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,987 psi | 63% | 2730 fps | 99% |
| Accurate High Country | <<locked>> | 90% | 45,556 psi | 71% | 2930 fps | 95.7% |
| Accurate MAGPRO | <<locked>> | 94% | 49,748 psi | 78% | 2995 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 48,718 psi | 76% | 2835 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 41,481 psi | 65% | 2776 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 92% | 45,237 psi | 71% | 2881 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 98% | 35,679 psi | 56% | 2703 fps | 95.2% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 41,669 psi | 65% | 2772 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 49,617 psi | 78% | 2861 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 52,910 psi | 83% | 2933 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,740 psi | 61% | 2740 fps | 99.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 44,425 psi | 70% | 2867 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 41,205 psi | 65% | 2766 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 90% | 41,756 psi | 65% | 2818 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,384 psi | 44% | 2480 fps | 97.2% |
| Alliant Reloder-25 | <<locked>> | 88% | 32,242 psi | 51% | 2608 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 80% | 30,530 psi | 48% | 2595 fps | 95.7% |
| Bofors RP15 | <<locked>> | 92% | 41,176 psi | 65% | 2805 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 50,024 psi | 78% | 2874 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 41,756 psi | 65% | 2818 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 43,801 psi | 69% | 2746 fps | 97.3% |
| Hodgdon H1000 | <<locked>> | 98% | 44,483 psi | 70% | 2858 fps | 95.8% |
| Hodgdon H380 | <<locked>> | 80% | 50,328 psi | 79% | 2887 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 41,945 psi | 66% | 2779 fps | 97.4% |
| Hodgdon H4350 | <<locked>> | 80% | 44,933 psi | 70% | 2802 fps | 96.9% |
| Hodgdon H4831 | <<locked>> | 92% | 48,472 psi | 76% | 2890 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 92% | 47,500 psi | 74% | 2874 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,405 psi | 57% | 2628 fps | 99.5% |
| Hodgdon Retumbo | <<locked>> | 96% | 41,060 psi | 64% | 2884 fps | 96.2% |
| Hodgdon Superformance | <<locked>> | 80% | 41,147 psi | 64% | 2792 fps | 96.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,354 psi | 43% | 1673 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,271 psi | 80% | 2871 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 53,548 psi | 84% | 2904 fps | 99.3% |
| IMR 4350 | <<locked>> | 80% | 39,378 psi | 62% | 2671 fps | 96% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,179 psi | 71% | 2776 fps | 98% |
| IMR 4831 | <<locked>> | 80% | 38,276 psi | 60% | 2677 fps | 98.7% |
| IMR 4955 Enduron | <<locked>> | 90% | 46,992 psi | 74% | 2828 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 94% | 46,325 psi | 73% | 2917 fps | 95.6% |
| Lovex S062 | <<locked>> | 80% | 51,648 psi | 81% | 2864 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,641 psi | 67% | 2723 fps | 98.6% |
| Lovex S070 | <<locked>> | 80% | 40,843 psi | 64% | 2703 fps | 97.3% |
| Lovex S071 | <<locked>> | 88% | 32,648 psi | 51% | 2536 fps | 95.3% |
| Norma 203B | <<locked>> | 80% | 52,272 psi | 82% | 2920 fps | 100% |
| Norma 204 | <<locked>> | 82% | 41,872 psi | 66% | 2759 fps | 95.4% |
| Norma MRP | 62.8 gr | 86% | 38,058 psi | 60% | 2766 fps | 96.1% |
| Norma URP | <<locked>> | 80% | 39,726 psi | 62% | 2723 fps | 98.9% |
| Ramshot Big Game | <<locked>> | 80% | 52,939 psi | 83% | 2943 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 46,267 psi | 73% | 2927 fps | 96% |
| Ramshot Hunter | <<locked>> | 80% | 38,566 psi | 60% | 2710 fps | 97.3% |
| Ramshot Magnum | <<locked>> | 92% | 38,232 psi | 60% | 2730 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,746 psi | 43% | 1713 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 50,154 psi | 79% | 2871 fps | 99.3% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 47,224 psi | 74% | 2920 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,987 psi | 63% | 2749 fps | 98.8% |
| ReloadSwiss RS 70 | 59.6 gr | 80% | 38,508 psi | 60% | 2756 fps | 98.3% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 37,971 psi | 60% | 2802 fps | 96.2% |
| Rottweil R 902 | <<locked>> | 80% | 53,330 psi | 84% | 2877 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 47,094 psi | 74% | 2818 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 45,788 psi | 72% | 2812 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 86% | 40,234 psi | 63% | 2746 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 43,801 psi | 69% | 2746 fps | 97.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,641 psi | 67% | 2723 fps | 98.6% |
| Shooters World Precision | <<locked>> | 80% | 51,648 psi | 81% | 2864 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,843 psi | 64% | 2703 fps | 97.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 48,457 psi | 76% | 2874 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,950 psi | 75% | 2713 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,669 psi | 65% | 2664 fps | 97.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 39,871 psi | 62% | 2740 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 47,297 psi | 74% | 2815 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 46,949 psi | 74% | 2802 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 36,274 psi | 57% | 2677 fps | 100% |
| Somchem S385 | <<locked>> | 84% | 38,130 psi | 60% | 2667 fps | 95.6% |
| Vihtavuori N135 | <<locked>> | 80% | 53,737 psi | 84% | 2835 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 54,056 psi | 85% | 2851 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 45,194 psi | 71% | 2740 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 41,176 psi | 65% | 2723 fps | 99.1% |
| Vihtavuori N165 | <<locked>> | 88% | 37,768 psi | 59% | 2651 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 52,228 psi | 82% | 2844 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 40,524 psi | 64% | 2723 fps | 98.9% |
| Vihtavuori N555 | <<locked>> | 80% | 31,546 psi | 49% | 2559 fps | 97.2% |
| Vihtavuori N560 | 67.2 gr | 92% | 47,587 psi | 75% | 2953 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 98% | 46,688 psi | 73% | 2920 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 40,176 psi | 63% | 2687 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 42,163 psi | 66% | 2782 fps | 97.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,932 psi | 39% | 2444 fps | 95.9% |
| Winchester Supreme 780 | <<locked>> | 88% | 40,321 psi | 63% | 2713 fps | 95.1% |
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 89 powders for 7 mm Weath. Mag. loaded with the .284 | 145gr | Peregrine Glider GRM. Alliant Reloder-26 delivers the highest muzzle velocity at 3,140 fps; across all powders the maximum-charge window runs from 1,873 fps to 3,140 fps. ADI AR 2225 gives the best case fill at 100 %, and 89 of the 89 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 57–90 %, 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. ADI AR 2225, Alliant Reloder-23, 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, ReloadSwiss RS 70 rank at the top here: for 7 mm Weath. 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.