There are many items that can affect the cycling of an autoloading shotgun. The Model 11-87 12 gauge shotguns with field barrels installed need a minimum of 3 ¼ dram and 1 1/8 oz shot to properly cycle.
The Model 1100 barrels are normally chambered for either 2 3/4" or 3", not both, and will only cycle that one length shell.
Some components that you can check are:
If you have checked these items and your firearm is still not operating properly, we recommend that you have your firearm evaluated by a Remington Authorized Repair Center or our factory. All repairs must have a Service Request (SR) Number in order to come in for repair. You can obtain a Service Request (SR) number by calling us at 1-800-243-9700 M-F 9am-5pm EST.