My dad recently bought a Remington 700 bdl in 7mm Remington magnum we was curious if it was shot out cause he did buy it used so I took a fired case sized it enough to hold.bullet put it in chamber and closed the bolt I looked in my lyman book at the oal it was 3.290 so I miced the case I closed in chamber and it reads 3.315 to 3.320 I did use a hornady ballistic tip to.check with I know there will be some variance in the tip but I figured it would get me pretty close . So.based on the reading I did get.is there.any life left it in my opinion is its pretty close to factory and hasn't bin shot.to much but when I took a magic marker colored the bullet and case rim and pulled the bullet out of the case and looked at how much was actually in the case it didn't seem.like too much and that was with the bullet seated to the lands . Am I doing it right for what I have in hand opinions and info would be great thank you
