It comes down to your familiarity with the tool (in this case a weapon) and the confidence it gives you to use it (hopefully that day will never come).
Exactly. Too many get wrapped up in trying to purchase a haradware solution to what is really a softwareproblem. If people would get proper, effective training (which can't be done by reading a book, watching a video, etc.) they would figure that out. I think it should almost be a mandate that a person can only buy 1 pistol and 1 rifle before getting training. It would cut down a lot on these silly "which is better" kind of threads.