Renton83
Member
I was loading my 243 with 36g of IMR3031 and 70g bullet for awhile and getting great groups. I was unable to buy more of that powder from my store so I got H414 which I read works well in 243win and fills the case more being a slower powder. Well I've tried literally every load with it and my groups are almost twice the size. I have not changed anything else, I also use WLR primers which are supposed to be good with ball powder. So am I doing something wrong or is it possible that my rifle just doesn't shoot well with this powder? I've shot over a hundred rounds with this new powder trying to get it to group and am frustrated.