I'm having problems with my 11-87. At my first tactical shotgun match yesterday, it began to malfunction & got worse as the day progressed. It would fire the first round, chamber the second, but the trigger was unable to fire the second round. If I cleared the round, the bolt would lock back (although there were more in the mag tube)and i could insert another shell in the chamber, hit the release and it would fire & repeat the malfunction. My autoloader was now a single shot. 
One of the guys looked at it & said most likely it was due to the fact it was dirty & nearly dry. I WD-40'd (all that was handy) the hell out of it & tried again; still malfunctioned. It was also suggested the sidesaddle was too tight, but i was careful not to overdo it when I installed that unit.
I DNF the match, and came home to give the gun a thorough scrubbing & lube. I tried it again today at the range, still malfunctions. I wish i had thought to bring the tools & pins to remove the sidesaddle & rule that out.
Anything else I should be checking for?
One of the guys looked at it & said most likely it was due to the fact it was dirty & nearly dry. I WD-40'd (all that was handy) the hell out of it & tried again; still malfunctioned. It was also suggested the sidesaddle was too tight, but i was careful not to overdo it when I installed that unit.
I DNF the match, and came home to give the gun a thorough scrubbing & lube. I tried it again today at the range, still malfunctions. I wish i had thought to bring the tools & pins to remove the sidesaddle & rule that out.
Anything else I should be checking for?