Total a scope from a gun with no built in moa on the rail and put it on another gun with a 20 mow rail. I normally zero for 45 or 50y (winter range/summer range) and know how many clicks I usually need in case I shoot in the basement at 15y. Was dark so wanted to get the gun somewhat zeroed at 15 in the basement and clicked up what I normally click And didn’t think about the 20 moa I already gained. Shot center at my target box, didn’t see impact. Went there to look. Shot went waaay above POA, over the target box, through the wall (unfinished basement so basically only the osb board, barrier and siding) and into the AC condenser outside of the house (walkout basement so concrete foundation lower than target box there). 3.5k mistake right there. Now have 2in thick and 18 in wide oak boards from a tree I cut some time ago all around the target box