Well, I'm old...70, but still teaching. One of the classes that I teach is "Firearms", a course in our Criminal Justice program. While I'm old(er), my students are young(er) (18-30 mostly). Many are planning on law enforcement careers, some are already working in the field. I personally mostly carry some variety of J frame, or Colt D frame, but have lots of semi auto choices... Kimber Ultra CDP II, Glock 23, Walther PPK, etc.

But... I'm surprised how many younger folks choose to carry a small revolver, such as I would choose. For the last few months I've been carrying a S&W 340 PD. It is not unusual for younger, well trained folks to carry a revolver. Many have both.

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SWCA 3084, SWHF 495, PGCA 3064