Ok so Im new to glocks and in semi-autos in general and I was putting regular whinchester ammo at the range and a shell casing got stuck in the slide. So I took out the magazine and racked the slide and it fell out. So im wondering what kind of a jam this is called? What could of caused it? and I know these next two questions are really stupid but I wanna be safe then sorry. Is it safe to shoot still? If i carry with one in the chamber is it randomly gunna go off? Thanks for the help also I had cleaned the gun yesterday put some solvents and some oil on it so idk if thats why.