When I worked for the prison system (06-09) during one of my yearly rifle/pistol qualifications the person (not naming genders) directly to my left raised her hand because she had a problem with her .357 she couldn't get her shells to go into the chamber they were just too big! Well I look over and she was trying to put an AR-15 bullet into the .357.... These are the people that protect us from convicted felons, enjoy!
Side note: many of the people that work for TDCJ aren't familar with firearms and needed extra help from instructors on how to aim the firearm.