I guess I'm a 32 nut. I have two Single sixes in 32 H&R I bought in the 1980's. One of each barrel length of the Single Seven in stainless. An eight shot Pinto Black Hawk. (at the end of the last production run, Ruger ran out of Stainless cylinders and ejector rod covers and used blued parts, only 116 were made) A 7 shot gp100 in 4", a 6 1/2 bisely 32 H&R of 2018 production, a 2018 327 fed Bisely 5 1/2" , a 4 5/8" sp101, not to mention my Henry Big Boy Steel 20".
But a 16-4 is a classic and I would need 1 in each barrel length. "The 327 Combat Masterpiece", has a ring to it! A "J" frame is too light for the 327, H&R maybe. I find the SP101 a handful with 327's and the GP100 a bit large. Yes, a "K" frame would be perfect!