I know several doctors in my city who are avid shooters. Here they tend to be anesthesiologists (because they come and go from the hospital late at night) and ophthalmologists (because they have nothing else to do, I guess). Suggest you ask your local gun ranges or police who are the doctors who pack. I presume this is somehow linked to profiling people who carry with regard to their mental character. Suggest you look into the website:
www.packing.org for more information too.