I'm still not sure I believe it. I bought a new stock for my little Savage .22 trainer a few weeks ago. It's walnut (looks like an AICS) and decently made. There was initially no change in zero from my old Tacticool, and that zero was years old. My confidence in that zero was 100%.

I skim bedded the action into the stock and painted it last weekend because I had nothing better to do. I didn't bother to check zero, assuming it wouldn't change. When I shot it at the .22 side match at last Saturday's PD match, I could barely hit the dirt. It was driving me nuts, so I took it out this afternoon to see if the zero had changed.

Unbelievably, it was shooting .9 mils high at 100 yards. Windage was good. I'm torquing the action more than before, so maybe something really did change. Accuracy was still good as it's grouping 5 into 3/4" at 100. If I'd had more ammo and my torque wrench, I might have tried some different values to see if I could get it to wander around.

Anyone else ever seen a change this large from something this minor?