Recently had to get rid of some .40 (Gold Dots) while others were shooting our new 9mm (Hornady) Even with the very obvious red button at the front of the 9mm ammo, some dudes tried to jam 40 in their mags. Also saw them try to get G19 magazines to seat in G17's, and same for 23/22's before. Non gun people, especially the ones who think they ARE gun people, will do wild stuff if you give them the opportunity.
We remedied it by only shooting one type of ammunition for duty and practice, and only keeping G17 magazines available on the range.
Hope that Trooper heals well.