Re: Shoulder Bump?
A guy who only ever once in a while posts here named "Hired Gun" recommended using the 25-06 Lee die for the 257 Wby and I do that. He said you had to bore the shoulder area out just a tiny bit. I have not done that as I do not see where I am catching the shoulder but the guy seems to know a lot of stuff so I still wonder if I need to. I have not reloaded a lot of cartridges for that rifle so I do not make too many claims one way or the other. You should PM him for details.
What I do know is that Wby brass is soft and it is easy to pull the neck out of alignment with the regular expander ball. The Lee collet is good for sloppy people like me.
The Smokin Fur Rifle Club