New Redding dies and new Hornady brass. I was checking the feeding of my MRC Lott when I discovered that I can not seat the 450 Barnes X bullets without putting a slight bend in the case. This bend will then cause the case not to feed into the chamber correctly. Figure if you will, a case shaped like a banana. Bullets are NOT being crimped at all. The crimping part of the seating die is not in contact with the mouth of the case.
Cases are under the maximun allowable length (2.790). When I go to seat the bullets they start ok and then strong resistence is felt while working the arm of the press to get the bullet seated to the proper depth. It feels like a serious crimp is being applied, but the die is set not to crimp.
I tried using Swift A frames (450 grains) and they seat fine.
It almost seems like the expander ball is not going deep enough to allow the longer X bullets to seat without distorting the case.