Many years ago I was in the LGS. A guy was looking at some handguns with a buddy of his. I was stopping in to pick up some ammo. Owner's son was taking some out for them to look at. One says to the other that is holding a very nice Browning Hi Power. "9mm is great for punching holes in paper. .45 Auto is better for punching holes in people." I know the owner, and his son well. The son was trying to hold back his laughing. He still was professional towards the two. The one looking at guns bought a Sig in .45 Auto.
No matter how many times you do it and nothing happens it only takes something going wrong one time to kill you.