Nobody that I’ve read has ventured forth with even ONE theory on WHY “LIVE” ammo was even on the SET much less put in one of the guns.
It really does suggest “intent” on someone’s part and “motive”.
You don’t need “LIVE” ammo on a movie set, period. Well, if your in Taliban territory maybe so.
Target practice in their time off. Ill-advised, but if it wasn’t a malicious act, it was a stupid accident.