I was given an old Mossberg .22WMR in rough shape. There was some rust on the barrel that I hit with some fine steel wool and got most of it. Any idea on how to get rid of the pitted stuff or how to rid the inside barrel of any rust that may be in there (besides a good cleaning)? How do I know if it will be safe to fire? When I look down the barrel it doesn't look too bad. Probably been 2 yrs since last fired. Probably not cleaned afterwards. Never had to deal with an abused rifle before.
Also looks like the stock is very slightly warped to one side and is putting just a bit of pressure on the barrel. Would the best approach be to just take off a tiny bit of the wood where the barrel seats?