Although I have quite a few 6" and 6-1/2" S&W revolvers (K-frame and N-frame) in my modest collection, I don't ever carry them. The largest revolver I ever carried routinely was a 4" Model 57 in a Bianchi X15 shoulder holster. These days, I find it easier to carry my S&W M&P 10mm 2.0 with 4.6" bbl, and it holds 15+1.