The only way I know is rather costly due to time involved but it does work.
I just got in a short action that had been modified by someone for the same reason - just different caliber:
A mag box was modified to accomodate the longer rounds - basically cut and rewelded.
A modified follower and spring had been made.
Receiver bottom opened up and slot that holds the box moved accordingly to reattach the larger mag box.
Feed ramp seemed OK but a little work would have made it smoother.
They had also ground the baffle shorter to allow the bolt to come back farther -quite crude but worked.
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