Looks like you need to go down the MK 248 Mod 1 route:
Some reading
https://www.americanrifleman.org/con...-mk-248-mod-1/
PDF spec sheet:
https://usarmorment.com/pdf/300WM_load%20data.pdf
Not simply a matter of 'plug and play' your rifle chamber may need some work to extend the throat (or just shoot it more)
Bookmarks