Paul, my 1904 28 gauge has 2 1/2" chambers. I have shot that gun with 2 3/4" shells for 53 years with no problem. I also have a 1900 28 gauge but don't know the chamber length. I shoot that one with 2 3/4" shells also. Do you have a PGCA letter on this gun? I have a lot of research material on early 28 gauges. If you would post the serial number, I could compare it with my research material.
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