Came across this PDF file regarding the old Lockbourne AFB, Ohio (the name was later changed to Rickenbacker AFB. It's right next to Columbus). About a third of way down are six or seven pictures of an air crew Pistol Qualification course, circa 1956. Details on the range and the firing line equipment.
(Side note: Kernel C's father was stationed here in 1961-1963, a RB-47 navigator, during which time Kernel C. was born in the Lockbourne AFB hospital).
Revolvers look like Combat Masterpieces or M&P's. Kinda hard to tell.
http://b-47.com/wp-content/uploads/2...bourne-AFB.pdf