Quote Originally Posted by strut64 View Post
The loss of accuracy of 22 250 barrel may be due to erosion of the throat. 22 250 are on the hot side for sure. Try getting stuff to measure CBTO ( cartridge base to ogive) and work on optimizing seating depth. Your bullet jump may have increased. Also, try seating your bullets closer to the throat short term.
This^^

I also shoot the 22-250... although I shoot a 55 gr. @ only 3300 fps... You're pushing those 60 grainers faster than I push my 55's... you've probably toasted the lands a bit, so you'll have to find where the lands starts now... or start seating the bullet longer and see if it starts to tighten back up. my original load development for my CBI barrel was 2.10 measuring to the OG. now I'm out to 2.15 after 1000 rounds maybe just a bit less.