I keep a piece of stiff wire that I simply run through the ports each time I put it back in the case.To clean out the carbon in a 1100 trap barrel,what size drill bit should be used, It's not my gun,but my friend tried it and it would not cycle the bolt back far enough.He put on a different barrel and it worked fine. thanks for any help and ideas..
I've had good luck using a similar formula but with Hoppes #9.For both 1100 and 11-87:
Pipe cleaner with Shooter's Choice, let it sit for a minute or two, followed by a dry pipe cleaner and normal barrel, magazine tube, action cleaning and occasional action spring cleaning (maybe twice a year on the action spring tube). Did go to double O-Rings on the 1100 because one bunch I bought seemed to be a bit thinner than previous ones. Kick out light 7/8 Oz empties with no problem.