Not trying to highack your thread, but consider the wildcat I am working on...

Barrel is chambered as .458WM

Normal .532 belted magnum brass uses a magnum bolt...

If you rebate the rim like I am doing... use a .270 or .30-06 bolt...

https://www.24hourcampfire.com/ubbthreads/ubbthreads.php/topics/12448930

I already have a few hundred rounds down range with the heavies...

Best of luck in whatever you decide... and Merry Christmas!

Drop me a PM if you need specs or a barrel made... at cost.

If you are not actively engaging EVERY enemy you encounter... you are allowing another to fight for you... and that is cowardice... plain and simple.