I really can't see a reason to even consider using the Vetterli action.
It's a generation older than the oldest Mosin Nagant. It's far rarer than the 12 million plus MN that were made.
There's no way it's going to be less expensive to obtain than the $100 a MN goes for nowadays.
It needs to be converted from rimfire to centerfire.
Tubular magazine means no spitzers.
The .45-70 is much longer than the 10.4x38 cartridge.
There's no way a Vetterli action is going to withstand anything close to the 52000 PSI pressure that a MN is rated for.
That's kind of the point of this exercise. To create a reliable bolt action using for the venerable.45-70 to it's full potential. The MN does that in spades. It can handle a .45-70 handloaded to maximum.
You can also add the .444 Marlin and the .405 Winchester to the possible cartridge list as well. Three matching rifles, one in each cartridge would be really neat to own.
Jim Green's Gun Works - Mosin Nagant Conversion to .45-70 Govt. - YouTube
Yes, the easy way would be to use the .458 Win Mag. But some times the easy way isn't as satisfying. The journey is part of the experience.
As Robert Frost said, taking the road less traveled makes all the difference.
Originally Posted by ironhead7544
Check out the Swiss Vetterli. It is a big bore bolt action with a tube magazine. You can get it set up for centerfire.
The easy way would be find a 458 Mag and just load it to your specs. Sounds like fun.