Another thought...
You say that getting the action out of the stock is a chore. It's possible that your recoil lug isn't doing all of the work. Your magizine could be (inconsistantly) absorbing some of the recoil which could induce vertical stringing.
Coyoter
You say that getting the action out of the stock is a chore. It's possible that your recoil lug isn't doing all of the work. Your magizine could be (inconsistantly) absorbing some of the recoil which could induce vertical stringing.
Coyoter