No but it makes it easier to clean the bore and chamber. Make sure you got any residual preservative or packing grease and oil out. You could also have a build up of plastic from the shot shells in the chamber. Solvent on a tornado brush or bore brush wrapped with 0000 steel wool should take care of that.
Your owners manual should have most of the maintenance info you need. If you don't have one Remington will send you one free or you can print it off their web site.
