A few weeks ago I posted for .22 l.r. revolver but learned it would be in the same price range as a .357. I might just a semi-auto 22 l.r. pistol for practice. Anyhow, I want to get my 1st revolver and would like a S&W stainless frame .357 caliber for personal carry-on and home protection. I'm thinking of a barrel length between 2" and 3". What's the major difference between a 2" and 3" barrel except for size and weight? How about recoil? S&W's models are confusing to me. For example, they offer S&W 60 and 63, both in .357 and come in 3". Then, they also offer 640, 642, etc. Can you recommend a few models to me? I want a revolver that can be carried-on for personal protection and can also be used for home protection. My wife is likely to shoot it as well and she has very small hands and relatively weak arms. Therefore, recoil is a majoy consideration. Obviously, we'll practice using 38 special but will occasionally shoot in .357. One last thing, what are the advantage/disvantage of buying a revolver with exposed hammer vs non-exposed hammer? Thanks.