Anybody consider a Whelen AI to make headspacing more positive? You'd need to start with a .357 barrel to make a 35 Whelen AI, or you could make a 35-280 AI from a Whelen barrel, but that definitely would not fire any factory ammo. The rifling would be a little slower on the .357 barrel. I've got a .357 barrel, and H&R owes me another, so I suppose I should get out my chamber and reamer blueprints and see if I can make a Whelen AI with my 280AI reamer or if I'd have to order an x-06 AI reamer.