Dad ended up buying a Fat Bastard 3 brake, which I am now charged with installing for him. So, threading practice for stainless on the lathe will commence! Interesting that it is supposed to be readily move from rifle to rifle, but several guys report having to use Loctite on theirs to keep it from loosening. He's not interested in doing that and will keep it on the one rifle, so I will try to machine the shoulder just about right to time the brake when it's tight and not need to use the backlash nut to lock position.
Agree on silencers/suppressors but until we get rid of the clown show nonsense, it's too much hassle, especially when going to other states to hunt, etc where you theoretically are supposed to get permission, blah, blah, blah. I'd rather put even a short can on most rifles, but...