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My 40 year old 1100 has decided to not close all the way all the time. It's not consistent and a little nudge completes the job. Factory or reloads, it doesn't matter. Anyone have any ideas what to start looking at? Parts need replacement?
Bruce
 

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Clean the chamber. Make sure your reloads are sised .809 or smaller at the brass.

Take off the barrel and insert a shell, watching if it binds.

HM
 

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99 times of a 100 it will be the action spring, they are easily obtained. I have an extra one I think
 

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A forty year old 1100 should be checked for receiver cracking just ahead of the ejection port - especially if it's had a lot of rounds through it. I caught one once and Remington made it good. Also, it could just be worn out. Be careful you don't cut your fingers when you put them inside the receiver.
 

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Check the "h" shaped piston that the fork fits into, that rides in front of the action spring. I had one that wore thru, it was aluminum. Then.. if not that, take the bolt return spring/action spring out and clean/oil it and the tube that houses it. Tom B
 

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You might also check your gas rings. Make sure they are not binding in the barrel. The barrel is noted for getting carboned up where the gas rings seat. Try removing the gas rings and see if you still have problems with the bolt not closing all the way (do not shoot it this way of course). If you are still having problems your extractor may not be going into the barrel recess. clean this area and check to see if the extractor is hitting where it is not suppose to be. You could have a damaged extractor. The previous suggestions are also good ones. Good luck. Bob
 

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Last week my friends 1100 began to not close as you have described. A little tap on the operating handle and it would close. I found that the piston cylinder had a very thin build up of residue. This was very difficult to remove but after a good cleaning with 600 grit sand paper the bolt closes properly.
Regards, Keith
 

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The gas ring on the bbl can get pretty crusted up. You may need to get in there with a screwdriver and scrape it out.

Then go to Brownells and purchase one of there gas cylinder brushes. And, while your there you can purchase a new recoil spring and a few other extra parts.

Doug
 

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If your gas ring or barrel lug on your barrel is cruded up inside, the easiest way to clean this is a dremil tool with one of there stainless steel wheels. Makes short work of any fouling in it. I do mine every time I clean my gun. Takes about a minute. Thanks and good shooting, Bob Morris.
 

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GunDr and 121083 make a good point. But a good soaking of BreakFree CLP will make the cleaning easier. Regular use of BreakFree CLP will impede future build-up.

But you are due for action spring replacement whatever the immediate problem.
 
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