Originally Posted by ELKS2TH
Mine is being built by Randy Selby of Randy's custom rifles. He is building it on an old Enfield action I had. I chose this caliber after some discussion with him. Decided on this over the 7STW because there is a better choice of brass. Check out his web site. Randy's custom rifles. He has a good section about his history and experience.
Run a 300 roy through a 7stw die and it only needs to be fireformed and trimmed. I prefer standard shoulders so I've been with the stw. To each their own; they are both fine rounds.