Been having a lot of dry fires out of my 11-87 lately. I've cleaned it 4 timessince the begining of the year. So i know that its not dirty. Just took it out to the gun range3 weeks ago to sight in chokes for buckshot and it shot fine. Now the last 2 weeks its dry fired around 20 shells. I've taken the hole bolt and firing pin apart and cant find anything wrong. Any ideas??? All are welcome.....