Need a quick dimension off a Rem 700 .308...

chainring

Gunny Sergeant
Full Member
Minuteman
Oct 17, 2008
1,619
36
TEXAS
Positioning a Karsten cheek piece, but I don't have my barreled action in hand. How far back from the rear action bolt does the cheekpiece need to be in order to clear the bolt when drawn to its full extension as it is being removed?

Thanks!