I have a question about a piece for carrying. I own a model 1917 (brazil contract), and really like it. With a 3" barrel, I think it would make a great carry piece (I like revolvers and the 45 acp cartridge). My question is, is there any advantage of the model 625 over the model 1917? I know a 3" version of the 625 exists, eventually I'm sure I could find one. Other than the heavier barrel on the 625, are the two guns essentially the same? If not, what improvements were made on the 625? Thanks for your time!