I'm up in the air right now on what my new build will be chambered in but i have been doing some research on the 28 Nosler. I have a donor long action from a R700 chambered in 7mm Rem Mag. What bolt face would i need to chamber the 28 Nosler, will the current one work? Also assuming that i will be shooting 180gr VLD's what twist will i need in the barrel?