The gun should be ok to shoot.Check to see if forcing cone area is smooth going down barrel where shells are at,if so you should be ok.IF you see a ridge at end of the chamber I would have the chamber forcing cone removed. any gun smith can fix this with a chamber tool.Have a gun smith give you a second oppinon on chamber lenghts .Two of my 10ga. measure 3in. to ridge. The BARRELS on 10ga.s are overly thick which gives you strenth to open the forcing cones.