Stopping Power

[Mr. 16 gauge]

A fellow firearms instructor carries a 40 Caliber and feels a 9MM is too light for stopping power in any bullet weight or design. I wanted another opinion.

O.K., here is my opinion: I've worked in E.R.s, ICUs, and the O.R. for going on 30+ years now.....I can't comment on 'stopping power', but I CAN tell you that any round that is 9mm/38 cal (diameter) will NOT do your assailant any good with a 'good' (vital) hit. Remember: this is my personal opinion based on what I've seen and experienced.
Problem is, you can argue 'stopping power' till the cows come home, and the bottom line is....there is no way to definetively "prove" that one round is better than another.....each situation is different.
As for your 637: Check out the thread on this forum (concealed carry) called "More requests for CCW training" started by Adam Helmer. In it, you will see the round I carry in my .38 special (Colt Detective special); it is the old "FBI" load, and I feel quite confident that it is better than the FMJ you are currently carrying. I strongly suggest that you try a box....I think you will be pleased.