I bought a Lyman .38-55 and a .45 cal (short) neck sizing die. I have no complaints about eithers performance. However, when seating bullets in .45-70, using RCBS dies (from 1977) I noticed that the seating die sizes the lower part of the case that I wanted left alone. I used Lee dies to seat bullets in .38-55 and no problems but the RCBS are being a PITA. Any of you gents had this problem with RCBS dies?