@cdheller,
I don't expect this gun to be used for hunting or target shooting beyond more than 50 yards tops; this gun will be used for plinking, light target shooting (and maybe the revolver competition at the local hogan's alley setup...), and carry/defense. No hunting or serious target shooting.
You definitely have a point about .45 making a 0.45" hole, however, as jackssmirkingrevenge pointed out, penetration depth and permanant cavity are more important factors than straight-out wound size. .357 Magnum travels around 50% faster than .45 ACP, and is a smaller caliber, which translates to better penetration - with semi-jacketed hollowpoints (JHP's) the expansion is excellent, also. If we're comparing .357 to .45 ACP (not .454 Casul, though), then .357 is definately the better self defense caliber. However, revolvers rarely hold more than 8 rounds max, which can tilt the advantage in .45's favor depending on the situations.
To each his own on ammo choice and lineup. I have an 18" barreled mossberg 500 with pistol grips kept near my bed - first two shells are birdshot, the rest are .00 buck. I agree with your tactics there, but I'm not a big fan of snakeshot in pistols; if I want a spread I'll grab my shotgun. I've also heard repeated snakeshot use will fudge up your rifling.
I'm starting to lean more towards the revolver, because a good revolver will last a lifetime. I can't say I believe that to be true about a polymer-framed pistol, although I'm sure if you took excellent care of it, it could too.
I need to find a range where I can rent both guns in question and put a few boxes through each before making a decision on which to buy. If I get the revolver, I'll have the cylinder fluted to accept full moon clips instead of speedloaders, so I could carry moon clips of .357. That'd be sweet. Either weapon I get, I'll be adding a laser....
Thanks for your input.
Peace,
Pete Zaria.