The long actions are the same untill u go up to 338 lapua or 416 rigbee. This is nice because if u dont like ur current caliber a simple barrel swap u can go to a different one. Like a 7 mag has a bolt face of .540 so u can go to 300 win,300 ultra,338 ultra,338 win mag,26 and 28 nosler, and so on.