Most good smiths will tell you that the bolt thrust from a .588 rim diameter case is to much for a standard Remington, Winchester, Ruger, Savage, etc., action. I to wanted to build an ELR gun off the Norma case and could not find a smith that thought it was a good idea to do on a standard action. So, I am building a 300 RUM with plans to rebarrel to an 338 Edge once the RUM barrel is shot out. I am building on a large shank stainless Savage action, as I have one sitting in the safe, and I can put everything together myself.