I would like help finding a new powder to use loading .243 win with 62gr varmint grenade. I currently only use IMR 4350 and have trouble maintaining accuracy after a few shots until I clean it. I was wondering if it was caused by how dirty to powder is burning in my barrel. The patches come out black for the first few and it takes 20 or more patches to get it any where near clean. I don't have problems with other IMR powders in other calibers.


















































