Randy, no letter on my gun and no visible barrel marking. The order card on my gun is not in the records. You can measure your outside diameter if you want to compare our two guns, both of which are A Grade and 30". My gun is .800 in the front half and tapers up to .890 at the forend lug. I don't know what the gun weighs right now because it is under construction as a pigeon gun and has no wood at this time. The barrels weighed 3-10 when I bought the gun. Total gun weight with a bad replacement stock was 7-8. I think the chart in McIntosh' book says these barrels should be #3.
