you know I had a swap barrel made up on a post 64 model 70 Winchester that I use for '06 and magnum cased (bolt swap)
(22-250, 243, 7mm mag, 308, .30'06, 300 win mag, 333 Magnum)
And I was just thinking about doing the same for my new to me MVP - 223, 300 blackout, 350 Legend