I've got an old 4" -3, bought used over 20 years ago, it's really no looser now than then. I don't run it real hard anymore, 20 grains of 2400 and a 250 Keith is my personal max for it. Years ago I did discover that a 250 and a max charge of H110 would send it into that whole differential recoil/cylinder float thing - unlatching, rolling backward, double primer strikes...I don't do that anymore.
