Load Specifications
Load data in caliber 7 mm Weath. Mag. with .284 | 150gr | Peregrine VLR-4 bullet and 85 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Accurate High Country and Norma MRP.
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% | 57,290 psi | 90% | 2910 fps | 99.5% |
| Accurate 3100 | <<locked>> | 98% | 57,014 psi | 89% | 2966 fps | 100% |
| Accurate 4064 | <<locked>> | 82% | 56,884 psi | 89% | 2881 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 54,679 psi | 86% | 2949 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 54,578 psi | 86% | 3054 fps | 98.1% |
| Accurate MAGPRO | <<locked>> | 96% | 55,622 psi | 87% | 3058 fps | 97.2% |
| ADI AR 2208 | <<locked>> | 84% | 56,811 psi | 89% | 2920 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 55,956 psi | 88% | 3005 fps | 99% |
| ADI AR 2213 | <<locked>> | 98% | 57,406 psi | 90% | 3068 fps | 98.4% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 39,334 psi | 62% | 2769 fps | 97.4% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 55,985 psi | 88% | 2999 fps | 99% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 55,985 psi | 88% | 2999 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 54,389 psi | 85% | 2890 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 55,927 psi | 88% | 3012 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 57,305 psi | 90% | 3031 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 55,245 psi | 87% | 2992 fps | 98.9% |
| Alliant Reloder-22 | <<locked>> | 98% | 56,869 psi | 89% | 3058 fps | 99.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 57,711 psi | 90% | 3028 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 49,893 psi | 78% | 2972 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 54,302 psi | 85% | 3064 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 55,724 psi | 87% | 3038 fps | 99% |
| Bofors RP3 | <<locked>> | 82% | 54,984 psi | 86% | 2904 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 45,759 psi | 72% | 2894 fps | 96.7% |
| Bofors RP5 | <<locked>> | 98% | 56,869 psi | 89% | 3058 fps | 99.2% |
| Bofors RP7 | <<locked>> | 86% | 54,375 psi | 85% | 2900 fps | 99.3% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 49,095 psi | 77% | 2913 fps | 97.6% |
| Hodgdon H380 | <<locked>> | 82% | 55,434 psi | 87% | 2927 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 56,826 psi | 89% | 3009 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 86% | 56,304 psi | 88% | 2966 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 96% | 57,421 psi | 90% | 3002 fps | 97.8% |
| Hodgdon H4831 SC | <<locked>> | 96% | 56,333 psi | 88% | 2986 fps | 97.6% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 56,043 psi | 88% | 2930 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 48,718 psi | 76% | 3022 fps | 98.8% |
| Hodgdon Superformance | <<locked>> | 88% | 57,479 psi | 90% | 3048 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,738 psi | 58% | 1847 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 56,101 psi | 88% | 2900 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 55,869 psi | 88% | 2940 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 86% | 56,028 psi | 88% | 2927 fps | 99.7% |
| IMR 4831 | <<locked>> | 90% | 55,230 psi | 87% | 2943 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 55,027 psi | 86% | 2930 fps | 97.5% |
| IMR 7828 SSC | <<locked>> | 98% | 55,071 psi | 86% | 3041 fps | 98.1% |
| Lovex S062 | <<locked>> | 82% | 56,231 psi | 88% | 2890 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 56,333 psi | 88% | 2923 fps | 100% |
| Lovex S070 | <<locked>> | 90% | 57,725 psi | 90% | 2969 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 50,386 psi | 79% | 2864 fps | 99.7% |
| Norma 203B | <<locked>> | 82% | 57,217 psi | 90% | 2949 fps | 100% |
| Norma 204 | <<locked>> | 90% | 56,869 psi | 89% | 2995 fps | 99% |
| Norma MRP | <<locked>> | 96% | 56,811 psi | 89% | 3084 fps | 99.8% |
| Norma URP | <<locked>> | 90% | 57,029 psi | 89% | 2989 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 55,434 psi | 87% | 3058 fps | 98.5% |
| Ramshot Hunter | <<locked>> | 90% | 56,043 psi | 88% | 2995 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 53,795 psi | 84% | 2992 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,347 psi | 59% | 1886 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 55,100 psi | 86% | 2910 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 56,681 psi | 89% | 3018 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 54,911 psi | 86% | 2976 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 57,392 psi | 90% | 3068 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 49,153 psi | 77% | 3022 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 84% | 55,376 psi | 87% | 2904 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 57,319 psi | 90% | 2976 fps | 98.3% |
| Rottweil R 905 | <<locked>> | 94% | 54,563 psi | 86% | 2976 fps | 98.9% |
| Rottweil R 907 | <<locked>> | 86% | 54,375 psi | 85% | 2900 fps | 99.3% |
| Shooters World Long Rifle | <<locked>> | 88% | 56,333 psi | 88% | 2923 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 56,231 psi | 88% | 2890 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 57,725 psi | 90% | 2969 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 57,014 psi | 89% | 2966 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 55,811 psi | 87% | 2782 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 55,854 psi | 88% | 2877 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 54,114 psi | 85% | 2972 fps | 98.9% |
| Somchem S355 | <<locked>> | 84% | 55,056 psi | 86% | 2897 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 55,434 psi | 87% | 2910 fps | 97.4% |
| Somchem S365 | <<locked>> | 92% | 57,246 psi | 90% | 2992 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 55,259 psi | 87% | 2953 fps | 99.4% |
| Vihtavuori N150 | <<locked>> | 86% | 56,579 psi | 89% | 2874 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 55,405 psi | 87% | 2930 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 54,795 psi | 86% | 2930 fps | 99.2% |
| Vihtavuori N540 | <<locked>> | 82% | 57,261 psi | 90% | 2871 fps | 100% |
| Vihtavuori N550 | <<locked>> | 88% | 54,636 psi | 86% | 2933 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 56,202 psi | 88% | 3002 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 56,782 psi | 89% | 3077 fps | 98% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 52,243 psi | 82% | 2982 fps | 97.4% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 55,027 psi | 86% | 2890 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 57,101 psi | 89% | 3009 fps | 99.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 54,911 psi | 86% | 3114 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 55,361 psi | 87% | 2949 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% | 53,722 psi | 84% | 2854 fps | 99.1% |
| Accurate 3100 | <<locked>> | 82% | 32,547 psi | 51% | 2497 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 53,287 psi | 84% | 2831 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 41,365 psi | 65% | 2713 fps | 99.4% |
| Accurate High Country | 64.5 gr | 88% | 44,063 psi | 69% | 2858 fps | 95.7% |
| Accurate MAGPRO | <<locked>> | 92% | 48,080 psi | 75% | 2923 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 50,183 psi | 79% | 2818 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 39,929 psi | 63% | 2700 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 90% | 43,569 psi | 68% | 2808 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 96% | 34,505 psi | 54% | 2641 fps | 95.2% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 40,190 psi | 63% | 2703 fps | 95.5% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 40,190 psi | 63% | 2703 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,952 psi | 80% | 2838 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 40,001 psi | 63% | 2726 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 46,195 psi | 72% | 2854 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 39,755 psi | 62% | 2694 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 88% | 40,350 psi | 63% | 2749 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,370 psi | 46% | 2474 fps | 98% |
| Alliant Reloder-25 | <<locked>> | 86% | 31,328 psi | 49% | 2546 fps | 95.8% |
| Alliant Reloder-26 | 60.4 gr | 80% | 31,691 psi | 50% | 2595 fps | 96.8% |
| Bofors RP15 | <<locked>> | 90% | 39,784 psi | 62% | 2733 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 51,459 psi | 81% | 2851 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 42,714 psi | 67% | 2831 fps | 95.7% |
| Bofors RP5 | <<locked>> | 88% | 40,350 psi | 63% | 2749 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 44,947 psi | 70% | 2730 fps | 97.9% |
| Hodgdon H1000 | <<locked>> | 96% | 42,786 psi | 67% | 2785 fps | 95.8% |
| Hodgdon H380 | <<locked>> | 80% | 51,677 psi | 81% | 2867 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 43,468 psi | 68% | 2769 fps | 98.1% |
| Hodgdon H4350 | <<locked>> | 80% | 46,180 psi | 72% | 2789 fps | 97.6% |
| Hodgdon H4831 | <<locked>> | 90% | 46,630 psi | 73% | 2815 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 90% | 45,730 psi | 72% | 2799 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,637 psi | 59% | 2615 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 92% | 37,318 psi | 58% | 2753 fps | 95.1% |
| Hodgdon Superformance | <<locked>> | 80% | 42,554 psi | 67% | 2782 fps | 97.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,325 psi | 43% | 1647 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 52,823 psi | 83% | 2851 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 40,495 psi | 63% | 2657 fps | 96.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,325 psi | 73% | 2759 fps | 98.5% |
| IMR 4831 | <<locked>> | 80% | 39,552 psi | 62% | 2664 fps | 99.2% |
| IMR 4955 Enduron | <<locked>> | 88% | 45,455 psi | 71% | 2759 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 92% | 44,614 psi | 70% | 2844 fps | 95.6% |
| Lovex S062 | <<locked>> | 80% | 52,997 psi | 83% | 2841 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 43,787 psi | 69% | 2707 fps | 99% |
| Lovex S070 | <<locked>> | 80% | 42,018 psi | 66% | 2690 fps | 97.9% |
| Lovex S071 | <<locked>> | 86% | 31,734 psi | 50% | 2477 fps | 95.4% |
| Norma 203B | <<locked>> | 80% | 53,650 psi | 84% | 2897 fps | 100% |
| Norma 204 | <<locked>> | 80% | 40,132 psi | 63% | 2684 fps | 95.3% |
| Norma MRP | 61.6 gr | 84% | 36,825 psi | 58% | 2697 fps | 96.1% |
| Norma URP | <<locked>> | 80% | 41,017 psi | 64% | 2710 fps | 99.3% |
| Ramshot Grand | <<locked>> | 92% | 44,556 psi | 70% | 2858 fps | 96% |
| Ramshot Hunter | <<locked>> | 80% | 39,798 psi | 62% | 2697 fps | 98% |
| Ramshot Magnum | <<locked>> | 90% | 36,666 psi | 57% | 2654 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,920 psi | 44% | 1690 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,692 psi | 81% | 2858 fps | 99.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 49,066 psi | 77% | 2904 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 41,365 psi | 65% | 2736 fps | 99.3% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,929 psi | 63% | 2749 fps | 99% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 36,709 psi | 58% | 2733 fps | 96.2% |
| Rottweil R 903 | <<locked>> | 80% | 48,457 psi | 76% | 2795 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 44,295 psi | 69% | 2743 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 84% | 38,986 psi | 61% | 2677 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 44,947 psi | 70% | 2730 fps | 97.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,787 psi | 69% | 2707 fps | 99% |
| Shooters World Precision | <<locked>> | 80% | 52,997 psi | 83% | 2841 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 42,018 psi | 66% | 2690 fps | 97.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,850 psi | 78% | 2854 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 49,385 psi | 77% | 2690 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,772 psi | 67% | 2651 fps | 98% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 38,653 psi | 61% | 2671 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 48,588 psi | 76% | 2795 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 45,266 psi | 71% | 2733 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 37,652 psi | 59% | 2664 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 36,811 psi | 58% | 2598 fps | 95.5% |
| Vihtavuori N150 | <<locked>> | 80% | 46,470 psi | 73% | 2720 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,424 psi | 66% | 2707 fps | 99.5% |
| Vihtavuori N165 | <<locked>> | 86% | 36,434 psi | 57% | 2582 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 53,519 psi | 84% | 2818 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 41,756 psi | 65% | 2707 fps | 99.3% |
| Vihtavuori N555 | <<locked>> | 80% | 32,779 psi | 51% | 2552 fps | 98% |
| Vihtavuori N560 | <<locked>> | 90% | 45,948 psi | 72% | 2881 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 96% | 45,382 psi | 71% | 2854 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,582 psi | 65% | 2674 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 43,468 psi | 68% | 2769 fps | 98.1% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,817 psi | 40% | 2451 fps | 97.3% |
| Winchester Supreme 780 | <<locked>> | 86% | 38,812 psi | 61% | 2644 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 85 powders for 7 mm Weath. Mag. loaded with the .284 | 150gr | Peregrine VLR-4. Winchester StaBALL HD delivers the highest muzzle velocity at 3,114 fps; across all powders the maximum-charge window runs from 1,847 fps to 3,114 fps. ADI AR 2225 gives the best case fill at 100 %, and 85 of the 85 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 150.0 gr projectile in 0.284" calls for a 1:9.0 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. Alliant Reloder-26, Accurate High Country, Norma MRP rank at the top here: for 7 mm Weath. Mag. with the .284 | 150gr | Peregrine VLR-4 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.