Intersting. I wonder if it has to do with how it is mounted or how the bolt hits the mounting point while being fired.
Just a follow-up. Today I zero'd my Aimpoint T-2 and didn't have any stock slap. The only changes to the rifle were the Aimpoint and my cheek weld. Before I had to use the top of my cheek bone and now, just below my cheek bone. Can shoot it all day now. Before, one mag and I was done.