I only load for 1 belted magnum(7mmRemMag),and I bought my dies used,They are an old set of RCBS,and are in great shape,and seen to have been taken care of,except for the fact that the seating die has been shortened some.I have a feeling it has something to do with the fact that it is for a belted case,but can't figure out why..I wonder if some of you may know the reason..Thanks