I shoot my carry gun a few times a year, 300 rounds or less. I know how to aim it, how it works, I just train on 22lr's because of money. It didn't change, I know how it works and feel fine using it at the range. I can keep a baseball group @ 7 yards with my carry gun, and 25 yards 1.5 footing with a DAO revolver.
SHTF vs TEOTWAWKI you ask? SHTF, just some crap on the ceiling and walls, TEOTWAWKI end of the world as we know it. Orignally made by 9mm/®™©