Originally Posted by hometheaterman

I don't know about your deal with no o-rings as every 1100 I've seen has had them 3" ones included. You sure yours aren't just missing?

As for the 1100's for 3" shells yes. They made a Magnum version and it should be stamped with the word Magnum on the receiver. They will shoot 3" shells but won't eject the 2 3/4" shells unless you either open up the gas port or use a barrel from a 2 3/4" version that has the two gas ports instead of the one used on the magnums. If you open up the gas port or have a gun smith do it you can shoot 2 3/4" shells but then the gun will really take a beating when shooting 3" shells so this is not recommended. If your receiver and barrel and not both marked for 3" shells DO NOT shoot them. The receiver should say Magnum and the barrel should say 3" shells. If not don't shoot 3" shells in it.


As for the above post about you being able to shoot smaller length shells but not larger he is partially correct. In most cases this is correct and safety wise you are fine. Most guns now can shoot the shells that they are rated for and the smaller length ones too. However, some of the older guns like the 1100 Magnums don't accommodate for the different sizes. Some other older guns are like that too. So if you try to shoot a 2 3/4" shell in them they wont eject them. You can safely shoot them but it's essentially a single shot unless you change barrels or open up the gas port like I said above.

BTW as I said earlier the 2 3/4" barrels from the 1100's use 2 gas ports where as the 3" magnum versions only have a single gas port.