I remember that being done in the 1970's/80's a fellow screwed a 375 Win Savage Brushgun barrel on a Savage 99 that was originally a 308 and opened the barrel to 375-08.
Everything's been done over the years. Fairly few new "Mouse traps".
A guy that is a vault of knowledge is Dave the owner of CH4D Tool & Die. He's been in the wildcat game forever. I don't care what combo you come up with. He can pull a print and tell you the first year it was done. Some of these popular wildcats kicking around today were tried many, many years ago.
No matter how crazy your cartridge. Quality custom dies for 89.00 a set. Incredibly well priced, considering I have paid $375.00 for a custom set of dies from RCBS, of course that was before I found CH4D.