Let someone else shoot it.
Too many variables...
What are you loading? Usually if a 69 Sierra and 25 of Varget with a BR4 in an LC case doesn't shoot MOA or less its a gun issue.
Which could be mount, scope, barrel etc...
First shot high on a clean barrel? Shots will fly different with different powders for a few shots till the barrel is fouled to that powder or even bullet jacket material at times...
There should be no reason for zero to change when breaking it down....
