A customer brought me a project. Convert a Herter's U9 to 277 Wysong. The reamer was supplied by PTG and his dies made by Hornady(I think). The cases are sized from GUNWERKS 7mm LRM. The sized case chambers good, but as soon as a bullet is inserted I can't close the bolt without brute force which make a follow up shot really hard. My only thought is to turn the neck .001 or so. the loading of the rounds does not include crimping. PTG is at a lose as the OD of the neck should allow it to close. I have not check the neck for runout.