I am in the process of teaching a fellow shooter how to reload. I gave him an OLD Herters press my father had out in the garage, and he is in the process of buying the rest of the stuff. He has encountered something that i never have. When he resizes his twice fired .243 brass, it is SUPER hard to size even with the proper application of Imperial Sizing Wax. We are also using a Lee case trimmer, and the stem will not even begin to go into the cases. I guess my father reloaded them the first time, and they were hard to size then as well.
What could be causing this. I don't think it is the dies or the case trimmers, becasue we have tried 2 different ones and the result is the same. Could it be that the chamber in his gun (1990 vintage Rem Model 700) is smaller than it is supposed to be? Or is the .243 known to cause the necks to thicken because of the brass flowing forward?
Please advise!