Well I had bought a 30-378 accumark used. I then sent it to Christensenarms to put a slect match grade shilen barrel with removable titauim muzzle brake
. accurized the action, timney trigger. Etc.
Now having said that you have a abolt, you can't dont nothing with that action,but you can a barrel a carbon barrel put on it. I am very happy with what they did to my gun. If you keep your abolt and have it rebarreled to 300wsm with the removable brake that would be a shooter. Thats also for about 1.200 bucks If you really want to get a custom rifle
built and you want a shortmag. I would have them build me a 300wsm with mcmillan edge stock 20-22oz of stock wieght on an action of your choice. I just bought a carbon fider x bolt. The action is nice the triggers are way better then the a bolts you have a clip and I would get a 24'' barrel with brake put on.
my 30-378 shoots 1/2'' groups with factory ammo.. If you op to go away from the short action. I would lean towards the 300 weatherby mag or 300 ultra. about the same in factory ammo I just read that there more reliable case feeding because of case design with weatherby. check out christensen arms. they garuntee thire rifle and their a big company that doesn't seem like thier going anywhere. The have about a month turn around time.