To the best of my knowledge: MVA HWs are all machined in-house, C.Sharps machined in-house and Shilo doesn't make a HW. MVA are the only reported to have interchangeable parts...and there is no collusion or collaboration between any of the three Montana companies.
I suspect, but don't know that there might have been some shared design, programs between Ron Long and MVA(?)
My fav small, low pressure action is the flat sided Low Wall and large/high pressure the dish sided high Wall. Both of these without modern scopes because of the extreme drop of the upper tang.
For a modern, hammerless scoped rifle action the Hagn, in any size format, simply has no peer.
THE FIRST AND LAST TIME I WILL EVER PUT A MODERN SCOPE ON A HIGH WALL!
LARGE HAGN ACTION, .30-06
I have also built some handsome and accurate rifles on Dakota action, this one a .257 Roberts with proprietary trigger and trigger guard.
