Load Specifications
Load data in caliber 7 mm Weath. Mag. with .284 | 130gr | Barnes X BT bullet and 77 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate High Country, Norma MRP 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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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 96% | 55,608 psi | 87% | 3117 fps | 99.6% |
| Accurate 4350 | <<locked>> | 88% | 57,043 psi | 89% | 3166 fps | 100% |
| Accurate High Country | <<locked>> | 94% | 55,985 psi | 88% | 3255 fps | 97.3% |
| Accurate MAGPRO | <<locked>> | 96% | 57,159 psi | 90% | 3258 fps | 96.2% |
| ADI AR 2208 | <<locked>> | 82% | 54,404 psi | 85% | 3068 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 56,942 psi | 89% | 3199 fps | 98.2% |
| ADI AR 2213 | <<locked>> | 96% | 54,737 psi | 86% | 3192 fps | 96.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 41,495 psi | 65% | 2963 fps | 96.5% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 57,116 psi | 90% | 3196 fps | 98.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 55,840 psi | 88% | 3097 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 56,855 psi | 89% | 3215 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 54,418 psi | 85% | 3179 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 56,391 psi | 88% | 3186 fps | 98.2% |
| Alliant Reloder-22 | <<locked>> | 96% | 54,607 psi | 86% | 3196 fps | 98% |
| Alliant Reloder-23 | <<locked>> | 98% | 55,347 psi | 87% | 3182 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 51,430 psi | 81% | 3169 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 94% | 55,695 psi | 87% | 3271 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 57,087 psi | 89% | 3235 fps | 98.3% |
| Bofors RP3 | <<locked>> | 82% | 57,421 psi | 90% | 3123 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 54,607 psi | 86% | 3196 fps | 98% |
| Bofors RP7 | <<locked>> | 86% | 56,014 psi | 88% | 3100 fps | 98.8% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 50,662 psi | 79% | 3100 fps | 96.5% |
| Hodgdon H380 | <<locked>> | 82% | 57,087 psi | 89% | 3133 fps | 100% |
| Hodgdon H414 | <<locked>> | 86% | 54,636 psi | 86% | 3150 fps | 99% |
| Hodgdon H4350 | <<locked>> | 86% | 57,203 psi | 90% | 3159 fps | 98.5% |
| Hodgdon H4831 | <<locked>> | 94% | 54,708 psi | 86% | 3130 fps | 96% |
| Hodgdon H4831 SC | <<locked>> | 96% | 57,348 psi | 90% | 3176 fps | 96.5% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 57,493 psi | 90% | 3136 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 50,372 psi | 79% | 3219 fps | 98% |
| Hodgdon Superformance | <<locked>> | 86% | 54,520 psi | 85% | 3176 fps | 98.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,014 psi | 58% | 1991 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 57,290 psi | 90% | 3104 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 56,840 psi | 89% | 3130 fps | 98.9% |
| IMR 4451 Enduron | <<locked>> | 86% | 57,072 psi | 89% | 3123 fps | 99.2% |
| IMR 4831 | <<locked>> | 90% | 57,087 psi | 89% | 3150 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 56,159 psi | 88% | 3120 fps | 96.5% |
| IMR 7828 SSC | <<locked>> | 98% | 56,028 psi | 88% | 3228 fps | 97% |
| Lovex S065 | <<locked>> | 86% | 54,723 psi | 86% | 3074 fps | 99.7% |
| Lovex S070 | <<locked>> | 88% | 56,115 psi | 88% | 3120 fps | 99.3% |
| Lovex S071ᴾ | <<locked>> | 100% | 53,026 psi | 83% | 3074 fps | 99.4% |
| Norma 204 | <<locked>> | 88% | 54,172 psi | 85% | 3123 fps | 97.6% |
| Norma MRP | <<locked>> | 94% | 54,099 psi | 85% | 3219 fps | 99% |
| Norma URP | <<locked>> | 88% | 54,998 psi | 86% | 3140 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 56,724 psi | 89% | 3248 fps | 97.5% |
| Ramshot Hunter | <<locked>> | 90% | 57,174 psi | 90% | 3192 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 54,998 psi | 86% | 3182 fps | 98.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,884 psi | 59% | 2041 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 56,565 psi | 89% | 3114 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 57,566 psi | 90% | 3225 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 56,521 psi | 89% | 3182 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 54,331 psi | 85% | 3202 fps | 99.9% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 50,937 psi | 80% | 3215 fps | 99% |
| Rottweil R 903 | <<locked>> | 84% | 57,464 psi | 90% | 3120 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 54,868 psi | 86% | 3107 fps | 96.8% |
| Rottweil R 905 | <<locked>> | 94% | 55,999 psi | 88% | 3176 fps | 98.2% |
| Rottweil R 907 | <<locked>> | 86% | 56,014 psi | 88% | 3100 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 86% | 54,723 psi | 86% | 3074 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 88% | 56,115 psi | 88% | 3120 fps | 99.3% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 54,853 psi | 86% | 3117 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 57,029 psi | 89% | 2982 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 57,537 psi | 90% | 3074 fps | 99.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 55,535 psi | 87% | 3169 fps | 98.1% |
| Somchem S355 | <<locked>> | 84% | 56,913 psi | 89% | 3110 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 56,782 psi | 89% | 3097 fps | 96.4% |
| Somchem S365 | <<locked>> | 90% | 54,911 psi | 86% | 3146 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 56,942 psi | 89% | 3153 fps | 98.9% |
| Vihtavuori N150 | <<locked>> | 84% | 54,665 psi | 86% | 3028 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 56,782 psi | 89% | 3133 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 56,130 psi | 88% | 3123 fps | 98.6% |
| Vihtavuori N550 | <<locked>> | 88% | 56,159 psi | 88% | 3136 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 54,882 psi | 86% | 3163 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 54,027 psi | 85% | 3202 fps | 96.1% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 54,230 psi | 85% | 3182 fps | 96.5% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 56,086 psi | 88% | 3087 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 54,824 psi | 86% | 3153 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 55,782 psi | 87% | 3323 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 56,594 psi | 89% | 3140 fps | 98.1% |
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>> | 82% | 35,723 psi | 56% | 2717 fps | 95.5% |
| Accurate 4350 | <<locked>> | 80% | 44,034 psi | 69% | 2930 fps | 99.1% |
| Accurate High Country | 69.2 gr | 90% | 49,182 psi | 77% | 3127 fps | 95.6% |
| Accurate MAGPRO | <<locked>> | 94% | 53,258 psi | 83% | 3186 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 51,314 psi | 80% | 3012 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 44,222 psi | 69% | 2953 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 94% | 51,285 psi | 80% | 3123 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 98% | 39,044 psi | 61% | 2897 fps | 95.4% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 44,454 psi | 70% | 2953 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 52,736 psi | 83% | 3048 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 41,597 psi | 65% | 2923 fps | 99.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 47,514 psi | 74% | 3058 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 44,034 psi | 69% | 2943 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 90% | 44,991 psi | 71% | 3009 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 31,676 psi | 50% | 2677 fps | 97.7% |
| Alliant Reloder-25 | <<locked>> | 86% | 33,562 psi | 53% | 2746 fps | 95.1% |
| Alliant Reloder-26 | 63.3 gr | 80% | 34,185 psi | 54% | 2805 fps | 96.3% |
| Bofors RP15 | <<locked>> | 92% | 44,367 psi | 70% | 2992 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 53,853 psi | 84% | 3068 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 44,991 psi | 71% | 3009 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 46,673 psi | 73% | 2927 fps | 97.1% |
| Hodgdon H1000 | <<locked>> | 98% | 47,514 psi | 74% | 3035 fps | 95.6% |
| Hodgdon H380 | <<locked>> | 80% | 53,592 psi | 84% | 3074 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 80% | 45,208 psi | 71% | 2966 fps | 97.3% |
| Hodgdon H4350 | <<locked>> | 80% | 47,645 psi | 75% | 2982 fps | 96.6% |
| Hodgdon H4831 | <<locked>> | 92% | 51,198 psi | 80% | 3064 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 94% | 53,766 psi | 84% | 3110 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 39,523 psi | 62% | 2812 fps | 99.5% |
| Hodgdon Retumbo | <<locked>> | 94% | 41,742 psi | 65% | 3009 fps | 95.1% |
| Hodgdon Superformance | <<locked>> | 80% | 44,092 psi | 69% | 2976 fps | 96.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,920 psi | 44% | 1788 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 54,012 psi | 85% | 3051 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 42,119 psi | 66% | 2844 fps | 95.9% |
| IMR 4451 Enduron | <<locked>> | 80% | 47,688 psi | 75% | 2949 fps | 97.8% |
| IMR 4831 | <<locked>> | 80% | 41,771 psi | 65% | 2867 fps | 98.8% |
| IMR 4955 Enduron | <<locked>> | 92% | 52,823 psi | 83% | 3061 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 94% | 49,139 psi | 77% | 3094 fps | 95.3% |
| Lovex S065 | <<locked>> | 80% | 45,774 psi | 72% | 2904 fps | 98.5% |
| Lovex S070 | <<locked>> | 80% | 44,237 psi | 69% | 2890 fps | 97.3% |
| Lovex S071 | <<locked>> | 86% | 34,983 psi | 55% | 2694 fps | 95.2% |
| Norma 204 | <<locked>> | 82% | 44,730 psi | 70% | 2940 fps | 95.3% |
| Norma MRP | 64.6 gr | 84% | 38,928 psi | 61% | 2897 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 42,931 psi | 67% | 2910 fps | 98.9% |
| Ramshot Grand | <<locked>> | 94% | 49,313 psi | 77% | 3110 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 41,597 psi | 65% | 2894 fps | 97.2% |
| Ramshot Magnum | <<locked>> | 92% | 41,626 psi | 65% | 2913 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,398 psi | 45% | 1827 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 53,185 psi | 83% | 3054 fps | 99.2% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 50,212 psi | 79% | 3110 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 43,424 psi | 68% | 2940 fps | 98.8% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 41,669 psi | 65% | 2946 fps | 98.4% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 38,841 psi | 61% | 2923 fps | 95.1% |
| Rottweil R 903 | <<locked>> | 80% | 50,850 psi | 80% | 3012 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 48,588 psi | 76% | 2989 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 86% | 43,613 psi | 68% | 2936 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 46,673 psi | 73% | 2927 fps | 97.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 45,774 psi | 72% | 2904 fps | 98.5% |
| Shooters World SW4350 | <<locked>> | 80% | 44,237 psi | 69% | 2890 fps | 97.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 51,314 psi | 80% | 3058 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 50,618 psi | 79% | 2887 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 44,817 psi | 70% | 2844 fps | 97.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 43,221 psi | 68% | 2930 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 50,488 psi | 79% | 3002 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 53,200 psi | 83% | 3035 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 39,755 psi | 62% | 2871 fps | 100% |
| Somchem S385 | <<locked>> | 84% | 41,684 psi | 65% | 2858 fps | 95.7% |
| Vihtavuori N150 | <<locked>> | 80% | 48,356 psi | 76% | 2923 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 44,193 psi | 69% | 2904 fps | 99.1% |
| Vihtavuori N165 | <<locked>> | 88% | 40,959 psi | 64% | 2831 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 43,845 psi | 69% | 2910 fps | 98.9% |
| Vihtavuori N555 | <<locked>> | 80% | 35,621 psi | 56% | 2769 fps | 97.8% |
| Vihtavuori N560 | <<locked>> | 92% | 50,705 psi | 79% | 3140 fps | 95.3% |
| Vihtavuori N565 | <<locked>> | 98% | 50,633 psi | 79% | 3117 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 43,105 psi | 68% | 2864 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 45,208 psi | 71% | 2966 fps | 97.3% |
| Winchester StaBALL HD | <<locked>> | 80% | 28,529 psi | 45% | 2671 fps | 97.2% |
| Winchester Supreme 780 | <<locked>> | 88% | 43,497 psi | 68% | 2897 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 77 powders for 7 mm Weath. Mag. loaded with the .284 | 130gr | Barnes X BT. Winchester StaBALL HD delivers the highest muzzle velocity at 3,323 fps; across all powders the maximum-charge window runs from 1,991 fps to 3,323 fps. ADI AR 2225 gives the best case fill at 100 %, and 77 of the 77 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 130.0 gr projectile in 0.284" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. ADI AR 2225, Alliant Reloder-25, Bofors RP15 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 High Country, Norma MRP, Alliant Reloder-26 rank at the top here: for 7 mm Weath. Mag. with the .284 | 130gr | Barnes X BT 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.