I've heard bad reports about various no-gunsmith mounts, but the only one I have experience with is the aimtech and it isn't good . I had it on a 629-4 and it consistently shot loose at the side plate screws even with loc-tight , and that was with mostly mid range loads . Aimtech sent new screws,but it still happened . The gun was marked by the moving of the mount , but with stainless you can polish it to cover up the marks . Maybe I had a bad mount I don't know but thats what happened to me .