I use the Berry 147 grain bullets and at first the ring showed up. I went and had Dillon send me another seating insert to keep before I modified my existing insert. Centered the seating stem in a drill press with a bullet, then put wax on bullet you want to use, place JB weld in the insert, press the two together and let the JB set up enough to remove bullet, a little trimming flush with the inset and you have a custom seating stem for your bullet.