I have a M64 3" heavy barrel with round butt. Buffalo Bore loads makes it just about perfect for a CCW six gun. I have other K-frames but that "petite round butt" gets the most attention.
My M13, same configuration as your M64, has been my regular carry for a few years now. It carries all day just fine IWB, and there are damned few handguns I can shoot better. Gold Dot .38 Specials are what reside in the cylinder.
