Originally Posted by deertroy1
How about some other Cooper owners. Did your rifle shoot good right away or it it take awhile?
I have a 22-250 that shot better as I got more rounds through it, but nothing like what you are seeing. It went from a MOA gun to about a half MOA shooter after 70 or 80 rounds, but I attributed it more to load development than break-in.
I have a Cooper in 280AI that shot fireforming rounds like complete crap (they were jammed and not charged ideally) so maybe that attributed to a break-in. When I got into actual load development it was the easiest I've ever done.
It seems weird that groups would open up that much
. I'm sure you don't want to hear it after sending it back once already, but it sure sounds like something isn't right... In my (often wrong) opinion i wouldnt expect flyers that far out there to settle in after more break-in...