Load Specifications
Load data in caliber 7 mm Weath. Mag. with .284 | 120gr | Barnes X BT bullet and 76 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Alliant Reloder-26 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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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2700 | <<locked>> | 82% | 56,608 psi | 89% | 3176 fps | 98.2% |
| Accurate 3100 | <<locked>> | 98% | 56,536 psi | 89% | 3238 fps | 99.4% |
| Accurate 4064 | <<locked>> | 82% | 57,551 psi | 90% | 3189 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 54,723 psi | 86% | 3238 fps | 99.8% |
| Accurate High Country | <<locked>> | 96% | 57,261 psi | 90% | 3383 fps | 96.8% |
| ADI AR 2208 | <<locked>> | 84% | 55,825 psi | 87% | 3202 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 54,621 psi | 86% | 3264 fps | 97.1% |
| ADI AR 2213 | <<locked>> | 98% | 55,898 psi | 88% | 3310 fps | 96% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 57,116 psi | 90% | 3232 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 57,392 psi | 90% | 3258 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 57,696 psi | 90% | 3346 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 55,622 psi | 87% | 3314 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 57,537 psi | 90% | 3310 fps | 97.7% |
| Alliant Reloder-22 | <<locked>> | 98% | 55,434 psi | 87% | 3314 fps | 97.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 56,144 psi | 88% | 3307 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 48,994 psi | 77% | 3225 fps | 99.1% |
| Alliant Reloder-26 | <<locked>> | 96% | 56,710 psi | 89% | 3399 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 54,389 psi | 85% | 3294 fps | 97.2% |
| Bofors RP3 | <<locked>> | 82% | 55,042 psi | 86% | 3199 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 55,434 psi | 87% | 3314 fps | 97.5% |
| Bofors RP7 | <<locked>> | 88% | 57,290 psi | 90% | 3228 fps | 98.4% |
| Hodgdon H380 | <<locked>> | 82% | 54,969 psi | 86% | 3209 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 88% | 55,898 psi | 88% | 3278 fps | 98.7% |
| Hodgdon H4350 | <<locked>> | 86% | 55,245 psi | 87% | 3232 fps | 97.5% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 55,013 psi | 86% | 3212 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 48,022 psi | 75% | 3255 fps | 96.4% |
| Hodgdon Superformance | <<locked>> | 88% | 55,999 psi | 88% | 3310 fps | 98.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,840 psi | 58% | 2070 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 55,463 psi | 87% | 3189 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 54,897 psi | 86% | 3202 fps | 98.1% |
| IMR 4451 Enduron | <<locked>> | 86% | 55,158 psi | 86% | 3196 fps | 98.5% |
| IMR 4831 | <<locked>> | 90% | 54,679 psi | 86% | 3222 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 96% | 57,305 psi | 90% | 3241 fps | 95.9% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 57,348 psi | 90% | 3353 fps | 96.5% |
| Lovex S062 | <<locked>> | 82% | 56,144 psi | 88% | 3186 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 55,869 psi | 88% | 3199 fps | 99.4% |
| Lovex S070 | <<locked>> | 90% | 57,334 psi | 90% | 3248 fps | 99% |
| Lovex S071ᴾ | <<locked>> | 100% | 50,821 psi | 80% | 3136 fps | 98.6% |
| Norma 203B | <<locked>> | 82% | 56,695 psi | 89% | 3241 fps | 100% |
| Norma 204 | <<locked>> | 90% | 55,535 psi | 87% | 3251 fps | 97.1% |
| Norma MRP | <<locked>> | 96% | 55,317 psi | 87% | 3346 fps | 98.7% |
| Norma URP | <<locked>> | 90% | 56,130 psi | 88% | 3271 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 82% | 57,392 psi | 90% | 3264 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 54,143 psi | 85% | 3301 fps | 96.1% |
| Ramshot Hunter | <<locked>> | 90% | 54,853 psi | 86% | 3261 fps | 99.2% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 52,489 psi | 82% | 3235 fps | 97.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,652 psi | 59% | 2119 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 54,578 psi | 86% | 3182 fps | 98.9% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 54,911 psi | 86% | 3307 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 54,099 psi | 85% | 3251 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 55,564 psi | 87% | 3333 fps | 99.8% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 48,457 psi | 76% | 3255 fps | 97.7% |
| Rottweil R 903 | <<locked>> | 84% | 55,303 psi | 87% | 3199 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 56,086 psi | 88% | 3228 fps | 96.2% |
| Rottweil R 905 | <<locked>> | 96% | 57,188 psi | 90% | 3301 fps | 97.8% |
| Rottweil R 907 | <<locked>> | 88% | 57,290 psi | 90% | 3228 fps | 98.4% |
| Shooters World Long Rifle | <<locked>> | 88% | 55,869 psi | 88% | 3199 fps | 99.4% |
| Shooters World Precision | <<locked>> | 82% | 56,144 psi | 88% | 3186 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 57,334 psi | 90% | 3248 fps | 99% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 56,072 psi | 88% | 3248 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 55,056 psi | 86% | 3068 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 55,463 psi | 87% | 3146 fps | 98.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 56,695 psi | 89% | 3294 fps | 97.7% |
| Somchem S355 | <<locked>> | 84% | 54,911 psi | 86% | 3189 fps | 100% |
| Somchem S365 | <<locked>> | 92% | 55,985 psi | 88% | 3281 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 54,607 psi | 86% | 3215 fps | 98% |
| Vihtavuori N150 | <<locked>> | 86% | 56,086 psi | 88% | 3159 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 54,665 psi | 86% | 3205 fps | 99.8% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 57,145 psi | 90% | 3241 fps | 98.2% |
| Vihtavuori N540 | <<locked>> | 82% | 56,710 psi | 89% | 3159 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 57,450 psi | 90% | 3268 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 96% | 55,564 psi | 87% | 3287 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 57,725 psi | 90% | 3222 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 55,898 psi | 88% | 3278 fps | 98.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 52,199 psi | 82% | 3386 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 54,317 psi | 85% | 3202 fps | 97% |
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% | 53,287 psi | 84% | 3117 fps | 97.6% |
| Accurate 3100 | <<locked>> | 86% | 38,696 psi | 61% | 2881 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 54,389 psi | 85% | 3140 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 42,177 psi | 66% | 2992 fps | 98.2% |
| Accurate High Country | <<locked>> | 92% | 49,937 psi | 78% | 3245 fps | 95% |
| ADI AR 2208 | <<locked>> | 80% | 49,559 psi | 78% | 3091 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 90% | 48,124 psi | 75% | 3133 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 96% | 52,417 psi | 82% | 3245 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,691 psi | 79% | 3123 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 53,940 psi | 85% | 3199 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,885 psi | 63% | 2982 fps | 98.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 45,426 psi | 71% | 3123 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 90% | 47,747 psi | 75% | 3123 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 92% | 45,745 psi | 72% | 3123 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,400 psi | 48% | 2726 fps | 96.2% |
| Alliant Reloder-25 | <<locked>> | 90% | 36,172 psi | 57% | 2910 fps | 95.2% |
| Alliant Reloder-26 | 66 gr | 82% | 34,940 psi | 55% | 2917 fps | 95.6% |
| Bofors RP15 | <<locked>> | 96% | 48,095 psi | 75% | 3169 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 51,692 psi | 81% | 3143 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 45,745 psi | 72% | 3123 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 45,194 psi | 71% | 2992 fps | 95.9% |
| Hodgdon H380 | <<locked>> | 80% | 51,721 psi | 81% | 3150 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 80% | 43,192 psi | 68% | 3022 fps | 96% |
| Hodgdon H4350 | <<locked>> | 80% | 45,745 psi | 72% | 3041 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,710 psi | 59% | 2871 fps | 98.7% |
| Hodgdon Retumbo | <<locked>> | 98% | 45,078 psi | 71% | 3186 fps | 95.3% |
| Hodgdon Superformance | <<locked>> | 80% | 42,293 psi | 66% | 3031 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,731 psi | 43% | 1860 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 52,112 psi | 82% | 3130 fps | 99.9% |
| IMR 4350 | <<locked>> | 82% | 42,989 psi | 67% | 2963 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 45,963 psi | 72% | 3015 fps | 96.6% |
| IMR 4831 | <<locked>> | 80% | 40,089 psi | 63% | 2930 fps | 97.8% |
| IMR 4955 Enduron | <<locked>> | 94% | 54,114 psi | 85% | 3182 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 98% | 53,693 psi | 84% | 3284 fps | 95.6% |
| Lovex S062 | <<locked>> | 80% | 52,794 psi | 83% | 3130 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 44,237 psi | 69% | 2976 fps | 97.6% |
| Lovex S070 | <<locked>> | 80% | 42,525 psi | 67% | 2953 fps | 96% |
| Lovex S071 | <<locked>> | 90% | 37,521 psi | 59% | 2854 fps | 95.2% |
| Norma 203B | <<locked>> | 80% | 53,330 psi | 84% | 3186 fps | 100% |
| Norma 204 | <<locked>> | 86% | 48,863 psi | 77% | 3127 fps | 95.6% |
| Norma MRP | 68.7 gr | 88% | 42,264 psi | 66% | 3077 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 41,075 psi | 64% | 2972 fps | 97.9% |
| Ramshot Big Game | <<locked>> | 80% | 53,780 psi | 84% | 3205 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 50,459 psi | 79% | 3228 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 39,827 psi | 62% | 2949 fps | 95.9% |
| Ramshot Magnum | <<locked>> | 96% | 45,513 psi | 71% | 3094 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,340 psi | 44% | 1903 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,343 psi | 80% | 3123 fps | 98.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 48,022 psi | 75% | 3186 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 41,481 psi | 65% | 2995 fps | 97.8% |
| ReloadSwiss RS 70 | 63.8 gr | 80% | 39,900 psi | 63% | 2999 fps | 97.1% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 42,337 psi | 66% | 3104 fps | 95.5% |
| Rottweil R 903 | <<locked>> | 80% | 48,776 psi | 76% | 3081 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 52,910 psi | 83% | 3169 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 90% | 47,137 psi | 74% | 3110 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 45,194 psi | 71% | 2992 fps | 95.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 44,237 psi | 69% | 2976 fps | 97.6% |
| Shooters World Precision | <<locked>> | 80% | 52,794 psi | 83% | 3130 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 42,525 psi | 67% | 2953 fps | 96% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,371 psi | 77% | 3130 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 48,965 psi | 77% | 2969 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,337 psi | 68% | 2910 fps | 96.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 46,760 psi | 73% | 3104 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 48,776 psi | 76% | 3081 fps | 99.9% |
| Somchem S365 | <<locked>> | 80% | 37,724 psi | 59% | 2930 fps | 99.6% |
| Somchem S385 | <<locked>> | 86% | 42,627 psi | 67% | 2976 fps | 95.1% |
| Vihtavuori N150 | <<locked>> | 80% | 46,514 psi | 73% | 2995 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,496 psi | 67% | 2969 fps | 98.2% |
| Vihtavuori N165 | <<locked>> | 92% | 44,338 psi | 69% | 3002 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 80% | 53,359 psi | 84% | 3107 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 42,119 psi | 66% | 2972 fps | 98% |
| Vihtavuori N555 | <<locked>> | 80% | 33,794 psi | 53% | 2818 fps | 96.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,336 psi | 65% | 2927 fps | 99.6% |
| Winchester 760 | <<locked>> | 80% | 43,395 psi | 68% | 3028 fps | 96% |
| Winchester StaBALL HD | <<locked>> | 82% | 29,037 psi | 46% | 2769 fps | 96.2% |
| Winchester Supreme 780 | <<locked>> | 92% | 47,413 psi | 74% | 3071 fps | 95.4% |
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 88 powders for 7 mm Weath. Mag. loaded with the .284 | 120gr | Barnes X BT. Alliant Reloder-26 delivers the highest muzzle velocity at 3,399 fps; across all powders the maximum-charge window runs from 2,070 fps to 3,399 fps. ADI AR 2217 gives the best case fill at 100 %, and 88 of the 88 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 120.0 gr projectile in 0.284" calls for a 1:11.5 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. Norma MRP, Alliant Reloder-26, ReloadSwiss RS 70 rank at the top here: for 7 mm Weath. Mag. with the .284 | 120gr | Barnes X BT they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2217, ADI AR 2225 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.