When you clean your gun there are three places you absolutly want no oily substances. In the chamber, the latch recess under the chamber and the bottom of the latch, clean these places with alcohol or acetone to a dry state to keep the latch from sliding during firing.
Also you should uses a bore guide in the chamber when you clean the bore to prevent any oil getting into the chamber.
If the rifle fired you did follow through.
Fred M.