Here is my 3" 63, with 60 Pro grips, awaiting it's turn in the perfect fitting 3" J-frame holster from S&W Accessories. My 3" 60 Pro is pictured in the holster. Either revolver is easy to forget about in that holster. One caveat - get something better than an $11 WallyWorld belt!
I bought my 3" 63 two years ago when they had just finally been released. It joined my 5" 63, another 8-shooter, that had some trigger work and new springs. NIB, the new 3" 63 was - and remains - slicker in DA pull. Both are crisp and equivalent in SA pull. The 5" now has a green HiViz sight on it - and may group slightly better and more reliably drop rebounding steel plates that are 'iffy' with the 3" 63. My 4" 617 also has a HiViz sight - and may just be the best at grouping, no doubt it's better lockwork/lighter DA trigger being causal there. My 4" 617 was my first .22 rimfire revolver - and is a keeper - but that 3" 63 is a lot of fun - and well worth the expense. The $43 S&W Accessories' '60 Pro' grips help, too. A real 'must have' is Dave at DS-10 Speedloaders' S&W 8 shot speedloader and loading baseplate.
Ammo-wise, like the 5" 63 & 4" 617, I broke my 3" 63 in right - with WallyWorld's Federal 550 packs of 36gr plated HPs... el-cheapos! If you must, it will chamber and fire CCI Velocitors and Stingers... 24 or so is it before extraction of spent shells becomes difficult. I've shot a brick - 550 rounds - of the Fed el-cheapos - with no issues, although it took a week. The Stingers will change that - they really seem to foul the chambers quickly. Still, nice revolver. If I could only have one, it'd be a tough decision between the 3" 63 and the 4" 617 - the 5" 63 belonged to an old range-buddy - I bought it from his estate - it's not a favorite, except for sentimental value. The other two are better plinkers.
Stainz