Does anyone know how much freebore Remington puts into their RUM barrels ? I think I read .400 on the 7mm and the 300, but I don't know about the 338 or 375. I would think it would be different. I'm considering ordering a 375 barrel. I think I have a handle on how freebore potentially affects both accuracy and safety (overpressure), and the safety consideration concerns me more. When SAMMI specs a chamber, does it include a freebore spec ? Or is freebore a custom variable that must be reamed in specially ? I must learn how to order the barrel properly.