You beat me Kennyc! That is a Moss Pawn build on the Iraqveteran8888 Youtube channel. They have done more then one as I understand it.
AS I understand it the 7.62x54r cartridge is regarded by Lapua of Finland as an inherently accurate round There are a few American examples of rebarrelled on the internets and Youtube.
I have certainly considered it as an interesting idea for a project, the rifle for the moment is widely available and cheap as chips so there is no worry about cutting up some rare antique. I suppose if a gunsmith can put a new barrel on a Remington 700 why not a Nagant!
A few pics to wet appetites:
