Revolver Conversions
Some years ago, I converted a S&W Model 28 into a 1955 .45ACP when I picked up a barrel and cylinder for $125. Fitting the barrel was the easy part. Timing the star extractor by hand was the hardest part.
What I ended up with was a .45ACP revolver that would shoot 1" groups at 25 yards (from a rest) with no more recoil than a K38 using wadcutters. I loved that gun!
Note: It was stolen on Labor Day '04 so if you see such a conversion have the cops check the S/N!
As to .41 Mags -- There are some good deals on .41s out there if you keep looking. While the Rugers are no doubt good guns, the S&W remains the best IMO. If you hunt deer, the 6" is the way to go. Hunting Boar here in CA, I've used the 4" in the brush with good effect (though next time I'm packing the 4" on the hip and using the Marlin 1894FG lever gun in .41 mag).
You can also find a bargain if you run across the right well-used revolver too.
Two years ago a friend picked up a pinned & recessed M-57. It showed lots of wear and the action was terrible after some kitchen table gunsmith had dinked with it. The bore was excellent but the seller said it would FTFire 30% of the time. Sold for all of $200. We got him new action parts (GunPartsCorp) and a new extractor, spent a weekend refitting the parts and had a 'smith time it. The next step was to strip it down again, have the gun bead blasted and then he spent 2 days polishing it out (carefully to avoid losing the logos & rollmarks). Then it went off for a rebluing (MicroSight Belmont). I wish I'd had the digital camera as the end result looked great for a total of $400. The bluing had that yard-deep S&W blue-black lustre. Best of all, this 6" gun would put 5 shots into the X ring of a standard pistol target at 50 yards. If you're in Missouri and see a guy hunting with a scoped .41 Mag with faux ivory grips, ask him about his gun.