I've had this Remmy 1100 for about 15 years or so. I bought it used at the time and it's still in pretty good shape. I use to use it for trap and sporting clays so it's had at least a couple thousand shells thru it.
My problem is that after firing around 60 to 100 times (starting with a clean gun), the gun will fail to feed and then do so every 30 shots or so (the gun has done this since I owned it). The shell is out of the mag tube and on its way up into the chamber, but doesn't quite make it. A simple slap forward on the charging handle will then chamber the shell most of the time.
I have installed a new o-ring (more than once) and it didn't seem to solve the problem. I'm wondering if this is common with 1100's and there is a simple fix.
Could it be a weak recoil spring or mag spring? Any help would be appreciated. thanks.
ETA: The gun is a 2 3/4" chamber and I shoot mostly dove and quail loads in it.