Re: Setting back a 6.5-284 barrel, rechamber to 264 WM?
It all depends on how hard the barrel was run and how you treat it after it gets re chambered. I like to re chamber before the 6.5-284 hits 1000.
I would think 500 on the low end 1000 on the high end of target accuracy. You will want to take a little off the crown also.
"Fast is fine accurate is final"