I find this project fascinating. I can't contribute much, except a story related to me by my police officer father back in the late fifties.......
He and his partner were called to the scene of a shooting in the tenement area of our city. When they arrived, they found an overturned table, the floor littered with playing cards and money. There was a huge man laying in the corner....dead....with a large hole in his chest and beside him on the floor was a Colt Junior .25 automatic.
The other individual was a tiny, meek looking man still sitting in a chair. He had a .25 caliber hole in his shoulder and he still clutched a large caliber muzzle loading percussion pistol. After disarming him and summoning the coroner, my father asked him why he carried such a huge, antiquated pistol. His answer was classic....."Them lil' guns just gets you into trouble. These big ones gets you out...."