This is the first time loading for this gun. I had a redding seating die which I changed back to Dillon Dies which has a separate crimping die. My buddies round was the same oal, his crimp was .418" which I did try today on my load. I bought this gun used with a very low round count. (500) The gun has a Shuemann AET barrel which has never been cleaned, and shot only MG bullets.