Gun Nutt,
You wrote: "I thought I'd find out what your decisions would be for the best defensive caliber".
This topic is a "frequent favorite" at TFL. I would ask all my fellow TFL members to consider this question ANALYTICALLY by asking: "best in what defensive scenario?"
For example:
> I favor the 230 grain .45 ACP Hydra-Shok at home, but it would not be an optimal defensive round to penetrate glass or steel car parts.
> The 158 grain FMJ .357 magnum would be much better in the automobile scenario, but it has a real risk of dangerous "carry through" in a multiple dwellings, particularly with non-masonry wall between units.
> In that multiple dwelling, the venerable 130 grain .38 Special might be the optimal defensive load, due to "carry through" concerns.
These illustrations are intended to make the point that the firearm/load combination must be specifically designed for the likely "mission".
In 30+ years of Naval aviation operational and project management experience, I have learned that one selects ordnance based on the scenario -- cluster weapons are ineffective against armor but very successful against troops in the open, while GPS-guided bombs are efficient against fixed targets but relatively useless against mobile ones, and so forth.
This exact type of weapon/ammunition to target analysis is required to determine the best defensive combination (firearm/caliber and round).
[This message has been edited by RWK (edited March 18, 2000).]