I read through the whole thread. Randy is sure a piece of work. I would say using the red jackets probably does reduce the risk of injury as opposed to some of the other 209 breech plugs on plunger style inlines. But I am sure the blowback is horrible. I know how hard that can be to clean out of your action from using it with the red jackets in a disc rifle.
It isn't worth arguing with him I'm sure of that.