SAAMI specs, I believe, are on the conservative side, no doubt due to the liars, er, lawyers.
Randy's been doing this for longer than some of us have been alive and still has all his eyes and hands. I trust him and his loads.
What I'm trying to say is that when faced with a contradiction between The Book and Real Life, I go with practice instead of theory.
(ObDisclaimer: This post is not intended to encourage anyone to load their own ammo over max specs.)