If going from standard bolt (.473") to magnum bolt (.532") has a few issues. Rails at the rear of both are identical, but on the magnum action, rails at the front are wider to facilitate feeding from both left and right of the mag box, this can cause cartridges to hit the front of the barrel and jam, as the timing is wrong and cartridges do not glide over the feed ramp, they jump it.
I always advise against doing this unless you know a 'smith that can do it correctly.
The Wyatt's box is no issue.
Cheers.