Ugly question! I have to figure not only the ALL purpose sidearm, but keeping it running. Problem: gunsmithing becomes a problem at some point. This lets out the double action revolvers, unless I have access to a shop and could obtain some training I don't currently possess. Have you ever watched the fitting of a new extractor spider, or even a cylinder lock bolt? Much the same applies to some finely-fitted auto pistols.
I choose a 1911-family .45 auto. Full size, full weight, of the pre-1980 design. Single stack for portabilty and concealment. It would feed me and defend me, be easy to carry and readily maintained with minimum tools. Ammo is widely available, especially in the western hemisphere, as are reloading components. Probably the easiest auto cartridge to load properly.
Jeff Cooper, back in the 1960s, wrote of a wilderness trip of extended length, where the local political situation precluded ove one firearms per person. He specified a .45 auto with ten extra magazines, a cigar box full of spare parts and a .22 conversion unit for practice and small game. "Nothing short of major frame damage would put the piece out of action for good, and if a man so equipped left his relics in-country, it would not be because his sidearm let him down."
I would want both hardball and HP 230 gr loads, and some Remington shotshells. A huge lot of .22 LR HP and solids, and some .22 shorts and CB longs.
I am intrigued by Richard's choice of an S&W Model 37 as an always gun, and surely a short .44 mag or .45 Colt would be very versatile. I just keep coming back to, if limited to one handgun, gunsmiths might be hard to find.
Interesting topic. I enjoy seeing not only the choices others make but their reasoning as well. May we never be forced to make such a choice!
RR
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---The Second Amendment ensures the rest of the Bill of Rights---
[This message has been edited by Rocky Road (edited June 21, 2000).]