A year and a half ago, I was with some friends shooting. There was new guy (an associate of my friend) there that was new to guns, and had no clue on performing safety. He could recite all the safety rules, and could demonstrate them when asked to, but couldn't put them to practice them at all.
The first mistake was when he was just looking through the ammo, comparing ammo side by side. We were very explicit telling him to make sure the ammo stays sorted and to double check the caliber as he was loading them into the magazine. (we were shooting 9mm, .40 and .45 ACP).
He loaded up a .45 magazine and waited his turn (rule was, if you want to shoot, you load your own mags!). So my friend handed him his 1911 and this guy puts the mag in and starts shooting. 3 or 4 rounds into the mag he encounters a serious failure to eject issue. The cvasing is jammed up mouth of barrel and wouldn't budge. We unload the gun, and set it aside thinking we had a gun malfunction. That evening as I was helping clean the guns, we were able to extract the casing and found it was a .40 NOT the .45 ACP that it should have been.
Luckily there was no damage to the 1911.
We stopped the session only a few minutes latter as he was shooting my G19 and a casing came down his shirt, and he started jumping around screaming "ouch, its hot, its hot" meanwhile his finger is on the trigger, and the gun is waiving around pointing at me, and everyone else on the range! At that point, (after we came out from diving for cover) we took the guns away from him, read him the riot act, and told him he could never handle any of our guns again until he could prove he can handle guns safely by using a toy squirt gun!
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