There was a guy in Alaska building 99's in 375-284 about a decade or so ago with reportedly good results and no functionality issues.
The 450 Bushmaster is basically a 45-284, and it also works in the Savage 99. Chris built a rotor 99 one and barreled two for me based on the 99-C magazine action. One with a 16" barrel and one with a 20" barrel
This is the short barrel one. It does its job very well. Still have work to do on it with fitting the recoil pad up next.
Thank you for that. I appreciate the info and that is a really sweet rifle you have there.
The only real concern I had was pressures. I know the 99 is supposed to be able to handle up to 50k cup. I am not 100% sure what that will mean I need to limit my loads to in that chambering.