All you need to do to have a embarrassing moment reloading is to start reloading. I have done most of them. The first one was not putting any powder into a case that I was fire forming. It was a wildcat round that needed to be made out of a parent case. That primer managed to push the bullet about halfway up the barrel. Another one was miss reading the powder charges for a pistol that I was shooting hard cast lead bullets through. If you don't know if you push a lead bullet too fast it really leads up the barrel. It took a lot of cleaning to get all that lead out of that pistol barrel. Stuck cases, I've had them. But I have always managed to get them taken care of without damaging anything other than the case itself. My biggest problem is when I tear the head of the case off while the rest of the case is still in the loading die with the expanded firmly stuck in the case. The funnier ones were when I seated the bullet too far out in the case and went to check it in the rifle, spilling powder all over the action when I extracted the case with the bullet still stuck in the beginning of the barrel. Or mixing up the powder charges of loaded rounds using the same bullet. It makes it real interesting when you are just expecting a pop and get a real bang out of it.