RE: 338 Federal
chantecler111. What you are looking for is the 375-06 JDJ. It was developed by JD jones for the Encore. You can form the case from 30-06 or 35 Whelen. I don't know to much about it but I think it takes a special method of forming the cases. He later went on to using the 444 Marlin case for his wildcats.