Well the only revolver I currently own is a new model black hawk in 41 mag with a 4 5/8 barrel and here in barrel minimum is 5 inches so I cant use it but a 380 is ok with a 5 inch barrel.... I am however considering adding an inch muzzle break to fix that... Never had the barrel off a revolver though however I am sure that it wont fit in the lathe on the frame so.....