the big problem I am finding is the hole. fitting a shotgun primer is not going well. 1/4" drill ( .250) is to large and they fall in, 15/64 bit (.234) is to small and I can not press them in with out very excessive pressure. fed 209 primer is .240"

side note, tried enlarging to fit a large rifle primer. it is very time consuming for the equipment I have and was just something i tried while playing. but that at least worked as far as proper fit.