I have a couple shell holders that I had to sand down a few thousandths to get the shoulder bumped back far enough. Press would bottom out and I still couldn't get shoulders bumped back.
I try to keep track of my groups with Ballistic X app and it's not unusual for a .1 or .2 mil shift for a ten shot group. If I notice a trend I will slip the turrets. For me, one 10 shot group isn't enough to establish a zero. 3 plus separate groups gives me more confidence.
I swapped stocks, put my 6.5 CTR SWFA 10X in the Rokstok and the 6/7 in the Bravo. I shot what might be my personal best 10shot group with the CTR. The 6/7 did it's usual thing. (The shaded group) I was aiming at the 1.5" orange dot to the left. The only thing left would be confirming twist rate...