i asked armalite about the bolt life question....this was the question...
" is there a reccommended round count for bolt replacement.
say a typical cmp/dcm rifle in 200/300/600 yd competition"
here is armalite's answer.......
"The rule of thumb is to change the bolt when you rebarrel your rifle though this isn't a hard and fast rule. You should be fine until then."
i hope this puts to bed this issue.
mike in co