Sell the gun and buy a 300 RUM. The ultimate long range 30. You can always load it down to the poopers you are considering.
Interestingly enough, I did the opposite. While my 300RUM was a particularly accurate rifle it was just too much of a good thing for my needs. The blast from the PK brake was intolerable. I rebarreled to 30 Nosler and couldn't be happier. I've fooled around with loads that mimic everything from 300WSM to 300 WBY. And the best part is No More Obnoxious Brake!