I usually just thumb on checks on 45/70 boolits and size through a Lee sizer. Works great. But...thumbed on checks onto 49 lee 329" 8x56r boolits and sized. They seemed to pass through with little resistance, but the checks were dented up by the point of the following boolit and distorted. Any suggestions? I have kicked around making a longer brass boolit pusher thing which would mount in my press and not distort the checks? What am I doing wrong? Checks seem well seated before being sized.