:cb2: I have two of the .357/9mm convertibles (one in each barrel length) and I really like 'em. Both of mine shoot the tightest groups with .357 ammo, but the 9mm shoots very well, too. For practice and plinkin' for fun, the Wolf 9mm stuff is cheaper than 9mm or .38 reloads. The only thing less expensive is a .22.
Sorry, no experience with the .45 Colt/ACP.
My 2¢ worthget it! You'll love the versatility. (Especially if you don't reload!)