I was taught early on to never pick up ammo that is not mine on a range. This is extremely important.
I see people clear their guns after a stage and lose the round they ejected. They might pick up someone else’s or someone hand them the wrong one by accident. This is highly dangerous. Don’t do it!
It could be from an open gun loaded to major and you have one that only handles minor. It could destroy your gun and hurt you or bystanders.
Same for reloads. Don’t borrow them. The guy could be an idiot and give you something too hot. It’s best to reload your own.
So, if you don’t see it hit the ground, and know its yours, don’t put it in your gun.