I have a CZ 527 Varmint Laminate rifle. Last week I was at the range test firing a new handload and everything functioned fine. I brought the rifle home and put a different scope in the existing rings. When I tried to chamber a round, the bolt would not fully close. I tried to chamber a fired case, same result. Tried to close the bolt on an empty chamber, same result. Throat and chamber look OK. I don't understand why the bolt would not close on an empty chamber. Help!