Survival is the first word to be memorized in a SHTF or civil unrest situation.
Survival will usually be better promoted by autoloading weaponry, . . . both handguns and long guns.
IF we survive, . . . and IF we are not pursued, . . . policing my brass and the bad guys will become a priority, . . . but only to the point that I can do it without further danger.
In the end, . . . again, . . . survival is the buzz word, . . . and like the policeman, . . . getting your britches in a wad over fingerprints or empty brass can be detrimental to survival.
I might also point out that if the "powers that be" are techhie enough to go for fingerprints, . . . they'll doggone sure be doing DNA also, . . . which takes much less physical property than fingerprints, . . . and can pin point THE person better.
May God bless,
Dwight