I wonder if anybody makes a falling block, single shot 12 gauge. <img src="/ubbthreads/images/graemlins/smile.gif" alt="" />
W Greener did a martini henry action single shot 12G....became popular as a Howda Pistol when sawn down on the stock and barrel...you can still get them if you look....
Jim, on the 9mm v .45 ACP you ought to try a double stacked .45 before thinking they are too big in the grip...I had a no frills Para Ordinace P14 which are available at sensible money second hand with fixed sights...it would be my choice in the USA...and my hands are not huge. I combined parts from a Colt Gold Cup I had to make a comp gun out of it but out of the box the P14 was great as was.
If it is too big then stick with a single stack 1911...
IMO there is a lot of difference between the .45 and 9mm....and I have to use 9mm in a pistol...privately I would much prefer .45....there is a load of evidence on this if you want to research it....since 1911 and before this with the .455 Webley in Africa....their is no substitute for large bore stopping power in FMJ ammo.
I try to retain a need for an entry shotgun if I can.....that or a GPMG....the 7.62mm v 5.56mm is the same thing...personally I am all for our change to the .338 LM and as a back up I would rather have an AR180 with the M203...or better still a G3 and a M203....than anything in 5.56....never tried a M1A1 in 30-06 but that might be better still.
Personally I think the US Army had a better weapons system than anyone back in the pre M16 days....you never heard about stopping power issues then....