JD says he won't make anything WSM in encore as previous guys have said.......case head diameter is too big. At modern 60,000 PSI pressures he says case head can't go over 300 Win mag in size. If so, pressure must drop correspondingly. I have a 2 monster encores in 470 Nitro express and 416 Rigby both in 8 in. and 13 in. but the pressures are 35-40,000 PSI. 308 is nice or 300 win mag. tried and true