Wayne,
I guess everyone has their preferences, eh?
I think we'll have to agree to disagree on which is an easier, more accurate way to chamber and crown a muzzle. As to the range rods, you wouldn't need them to align the barrel to the axis of the lathe if your lathe (tail stock) is set up and trued. As to re-turning the barrel profile, I'm unsure what you mean. The crown would be the last thing cut, so the profile is already been turned(?). I think perhaps we just have a different order of machining in our individual processes.
No worries though, as that is what this place is for, eh? Discussing the differences and similarities...
Good day sir!