Re: 338 edge problem
Make sure that the crimp on the seater die does not reform the case when seating the bullet. This can happen when it is turned into the press too low. Setup the seater die by taking the case to the top of the press. Then screw the seater die in until it get stuck against the case neck. The turn the seater die out at least two full turns. This will prevent the seater die to crimp the case neck.