This is usually a couple range sessions. I make sure to let the barrel cool down between 3-shot groups. I did do the proper break in schedule also. I really noticed it on a Savage predator 22-250. Will shoot very tight .3-.5 groups then around 35 are so shots after a couple range sessions group opened up around a inch. Once I gave it a good clean it right back to .3 groups. Thanks for the info!
Bookmarks