Load Specifications
Load data in caliber 7 mm Weath. Mag. with .284 | 140gr | Barnes X S bullet and 75 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 MAGPRO and Accurate High Country.
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% | 54,636 psi | 86% | 3005 fps | 99.8% |
| Accurate 4350 | <<locked>> | 86% | 55,941 psi | 88% | 3045 fps | 100% |
| Accurate High Country | <<locked>> | 92% | 54,940 psi | 86% | 3136 fps | 97.7% |
| Accurate MAGPRO | <<locked>> | 94% | 55,883 psi | 88% | 3136 fps | 96.6% |
| ADI AR 2208 | <<locked>> | 82% | 56,246 psi | 88% | 2995 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 55,419 psi | 87% | 3074 fps | 98.5% |
| ADI AR 2213 | <<locked>> | 96% | 57,000 psi | 89% | 3136 fps | 97.8% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 48,095 psi | 75% | 2956 fps | 96% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 43,207 psi | 68% | 2923 fps | 98% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 55,854 psi | 88% | 3077 fps | 98.6% |
| Alliant Reloder-16 | <<locked>> | 88% | 55,477 psi | 87% | 3087 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 56,898 psi | 89% | 3107 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 55,216 psi | 87% | 3068 fps | 98.5% |
| Alliant Reloder-22 | <<locked>> | 96% | 57,087 psi | 89% | 3140 fps | 98.9% |
| Alliant Reloder-23 | <<locked>> | 96% | 54,520 psi | 85% | 3064 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 53,621 psi | 84% | 3110 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 92% | 54,708 psi | 86% | 3150 fps | 100% |
| Bofors RP15 | <<locked>> | 98% | 56,043 psi | 88% | 3120 fps | 98.7% |
| Bofors RP30ᴾ | <<locked>> | 100% | 49,908 psi | 78% | 3041 fps | 97.1% |
| Bofors RP5 | <<locked>> | 96% | 57,087 psi | 89% | 3140 fps | 98.9% |
| Bofors RP7 | <<locked>> | 84% | 54,563 psi | 86% | 2979 fps | 99.1% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 52,707 psi | 83% | 3051 fps | 97.8% |
| Hodgdon H414 | <<locked>> | 86% | 56,869 psi | 89% | 3084 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 84% | 55,898 psi | 88% | 3038 fps | 98.8% |
| Hodgdon H4831 | <<locked>> | 94% | 57,188 psi | 90% | 3077 fps | 97.2% |
| Hodgdon H4831 SC | <<locked>> | 94% | 55,898 psi | 88% | 3054 fps | 97% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 56,144 psi | 88% | 3012 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 52,576 psi | 82% | 3169 fps | 99.1% |
| Hodgdon Superformance | <<locked>> | 86% | 56,985 psi | 89% | 3117 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,275 psi | 58% | 1923 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 55,637 psi | 87% | 3012 fps | 99.2% |
| IMR 4451 Enduron | <<locked>> | 84% | 55,593 psi | 87% | 2999 fps | 99.4% |
| IMR 4831 | <<locked>> | 88% | 55,782 psi | 87% | 3028 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 54,592 psi | 86% | 2999 fps | 96.9% |
| IMR 7828 SSC | <<locked>> | 96% | 54,766 psi | 86% | 3110 fps | 97.5% |
| Lovex S065 | <<locked>> | 86% | 56,565 psi | 89% | 3005 fps | 99.9% |
| Lovex S070 | <<locked>> | 86% | 54,853 psi | 86% | 2999 fps | 99.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 55,564 psi | 87% | 3018 fps | 99.8% |
| Norma 204 | <<locked>> | 88% | 56,463 psi | 88% | 3068 fps | 98.5% |
| Norma 217ᴾ | <<locked>> | 100% | 39,131 psi | 61% | 2851 fps | 96% |
| Norma MRP | <<locked>> | 94% | 56,782 psi | 89% | 3163 fps | 99.6% |
| Norma URP | <<locked>> | 88% | 57,188 psi | 90% | 3071 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 55,317 psi | 87% | 3130 fps | 98% |
| Ramshot Hunter | <<locked>> | 88% | 55,956 psi | 88% | 3074 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 57,653 psi | 90% | 3130 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,985 psi | 60% | 1965 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 56,347 psi | 88% | 3097 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 55,201 psi | 87% | 3058 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 56,869 psi | 89% | 3140 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 53,185 psi | 83% | 3166 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 82% | 56,057 psi | 88% | 2992 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 57,029 psi | 89% | 3048 fps | 97.9% |
| Rottweil R 905 | <<locked>> | 92% | 54,839 psi | 86% | 3058 fps | 98.6% |
| Rottweil R 907 | <<locked>> | 84% | 54,563 psi | 86% | 2979 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 86% | 56,565 psi | 89% | 3005 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 86% | 54,853 psi | 86% | 2999 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 56,826 psi | 89% | 3045 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 55,448 psi | 87% | 2858 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 55,869 psi | 88% | 2953 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 54,389 psi | 85% | 3051 fps | 98.5% |
| Somchem S355 | <<locked>> | 82% | 55,695 psi | 87% | 2986 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 55,143 psi | 86% | 2979 fps | 96.8% |
| Somchem S365 | <<locked>> | 90% | 57,537 psi | 90% | 3077 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 55,651 psi | 87% | 3035 fps | 99.2% |
| Vihtavuori N150 | <<locked>> | 84% | 56,478 psi | 89% | 2953 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 55,579 psi | 87% | 3009 fps | 100% |
| Vihtavuori N165 | <<locked>> | 96% | 54,839 psi | 86% | 3005 fps | 98.9% |
| Vihtavuori N550 | <<locked>> | 86% | 54,839 psi | 86% | 3015 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 57,261 psi | 90% | 3094 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 56,550 psi | 89% | 3150 fps | 97.4% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 56,753 psi | 89% | 3130 fps | 97.7% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 54,650 psi | 86% | 2963 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 57,058 psi | 89% | 3087 fps | 99.6% |
| Winchester StaBALL HD | <<locked>> | 98% | 55,100 psi | 86% | 3199 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 55,187 psi | 86% | 3022 fps | 98.5% |
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% | 35,143 psi | 55% | 2615 fps | 96.1% |
| Accurate 4350 | <<locked>> | 80% | 46,093 psi | 72% | 2874 fps | 99.7% |
| Accurate High Country | 65.2 gr | 86% | 45,179 psi | 71% | 2949 fps | 95.3% |
| Accurate MAGPRO | 71 gr | 92% | 52,170 psi | 82% | 3071 fps | 95.8% |
| ADI AR 2208 | <<locked>> | 80% | 53,026 psi | 83% | 2943 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 43,221 psi | 68% | 2838 fps | 95.8% |
| ADI AR 2213 | <<locked>> | 90% | 47,007 psi | 74% | 2949 fps | 95.4% |
| ADI AR 2217 | <<locked>> | 98% | 45,223 psi | 71% | 2900 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 94% | 36,100 psi | 57% | 2736 fps | 95.1% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 40,857 psi | 64% | 2782 fps | 95.1% |
| Alliant Reloder-16 | <<locked>> | 80% | 43,337 psi | 68% | 2867 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 49,603 psi | 78% | 2992 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 40,509 psi | 63% | 2776 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 86% | 41,379 psi | 65% | 2835 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 33,127 psi | 52% | 2635 fps | 98.8% |
| Alliant Reloder-25 | <<locked>> | 84% | 33,025 psi | 52% | 2648 fps | 95.8% |
| Alliant Reloder-26 | 62.5 gr | 80% | 36,056 psi | 56% | 2769 fps | 97.9% |
| Bofors RP15 | <<locked>> | 88% | 41,075 psi | 64% | 2825 fps | 95.2% |
| Bofors RP30 | <<locked>> | 96% | 43,903 psi | 69% | 2920 fps | 95.4% |
| Bofors RP5 | <<locked>> | 86% | 41,379 psi | 65% | 2835 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 48,327 psi | 76% | 2864 fps | 98.1% |
| Hodgdon H1000 | <<locked>> | 94% | 43,468 psi | 68% | 2864 fps | 95.2% |
| Hodgdon H414 | <<locked>> | 80% | 46,934 psi | 74% | 2910 fps | 98.3% |
| Hodgdon H4350 | <<locked>> | 80% | 49,284 psi | 77% | 2920 fps | 97.7% |
| Hodgdon H4831 | <<locked>> | 90% | 50,096 psi | 79% | 2953 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 90% | 49,211 psi | 77% | 2936 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 41,249 psi | 65% | 2756 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 92% | 41,104 psi | 64% | 2910 fps | 95.9% |
| Hodgdon Superformance | <<locked>> | 80% | 46,166 psi | 72% | 2927 fps | 98% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,021 psi | 44% | 1719 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 43,729 psi | 69% | 2792 fps | 97.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 49,298 psi | 77% | 2887 fps | 98.6% |
| IMR 4831 | <<locked>> | 80% | 43,598 psi | 68% | 2812 fps | 99.5% |
| IMR 4955 Enduron | <<locked>> | 88% | 48,631 psi | 76% | 2890 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 90% | 45,136 psi | 71% | 2920 fps | 95% |
| Lovex S065 | <<locked>> | 80% | 47,413 psi | 74% | 2844 fps | 99.2% |
| Lovex S070 | <<locked>> | 80% | 45,919 psi | 72% | 2831 fps | 98.3% |
| Lovex S071 | <<locked>> | 82% | 32,518 psi | 51% | 2546 fps | 95% |
| Norma 204 | <<locked>> | 80% | 43,555 psi | 68% | 2822 fps | 95.8% |
| Norma 217 | <<locked>> | 98% | 36,869 psi | 58% | 2792 fps | 95% |
| Norma MRP | <<locked>> | 82% | 38,072 psi | 60% | 2789 fps | 95.8% |
| Norma URP | <<locked>> | 80% | 44,773 psi | 70% | 2854 fps | 99.6% |
| Ramshot Grand | <<locked>> | 90% | 45,121 psi | 71% | 2933 fps | 95.4% |
| Ramshot Hunter | <<locked>> | 80% | 43,439 psi | 68% | 2841 fps | 98.3% |
| Ramshot Magnum | <<locked>> | 88% | 38,029 psi | 60% | 2746 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,718 psi | 45% | 1762 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 52,388 psi | 82% | 3038 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 45,527 psi | 71% | 2887 fps | 99.5% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 43,424 psi | 68% | 2894 fps | 99.2% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 38,072 psi | 60% | 2825 fps | 95.9% |
| Rottweil R 903 | <<locked>> | 80% | 52,852 psi | 83% | 2940 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 44,570 psi | 70% | 2815 fps | 95% |
| Rottweil R 905 | <<locked>> | 82% | 40,074 psi | 63% | 2766 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 80% | 48,327 psi | 76% | 2864 fps | 98.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 47,413 psi | 74% | 2844 fps | 99.2% |
| Shooters World SW4350 | <<locked>> | 80% | 45,919 psi | 72% | 2831 fps | 98.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 53,359 psi | 84% | 2989 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 52,214 psi | 82% | 2812 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 46,427 psi | 73% | 2785 fps | 98.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 42,264 psi | 66% | 2815 fps | 95.8% |
| Somchem S355 | <<locked>> | 80% | 52,315 psi | 82% | 2930 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 48,588 psi | 76% | 2864 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 41,742 psi | 65% | 2815 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 38,421 psi | 60% | 2694 fps | 95.5% |
| Vihtavuori N150 | <<locked>> | 80% | 50,169 psi | 79% | 2854 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 46,064 psi | 72% | 2844 fps | 99.7% |
| Vihtavuori N165 | <<locked>> | 86% | 40,248 psi | 63% | 2730 fps | 95.7% |
| Vihtavuori N550 | <<locked>> | 80% | 45,672 psi | 72% | 2851 fps | 99.5% |
| Vihtavuori N555 | <<locked>> | 80% | 37,333 psi | 59% | 2720 fps | 98.8% |
| Vihtavuori N560 | <<locked>> | 90% | 49,647 psi | 78% | 3025 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 94% | 46,760 psi | 73% | 2949 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 44,788 psi | 70% | 2802 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 47,123 psi | 74% | 2910 fps | 98.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 29,892 psi | 47% | 2648 fps | 98.9% |
| Winchester Supreme 780 | <<locked>> | 86% | 42,540 psi | 67% | 2785 fps | 95.7% |
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 75 powders for 7 mm Weath. Mag. loaded with the .284 | 140gr | Barnes X S. Winchester StaBALL HD delivers the highest muzzle velocity at 3,199 fps; across all powders the maximum-charge window runs from 1,923 fps to 3,199 fps. ADI AR 2217 gives the best case fill at 100 %, and 75 of the 75 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 140.0 gr projectile in 0.284" calls for a 1:10.5 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. Alliant Reloder-26, Accurate MAGPRO, Accurate High Country rank at the top here: for 7 mm Weath. Mag. with the .284 | 140gr | Barnes X S 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.