How hard would it be to shorten the 300RUM case .250"? I am thinking of rechambering a 300 win mag to a shortened version of the 300RUM if forming the case would not be to difficult. I want more power than the 300 win mag but less than the 300RUM. I know the Dakota fits in there but the brass availability is my concern. Does anyone here load their 300 RUM down. If so what powder are you using and what is the load density like.