The barrels are "Acciaio Speciale Al Cromo Molibdeno". The last set Briley chokes were installed and the bores were sized the same with no additional charge. I never did ask any questions about chrome bores. I thought this was a type of steel only. I have been wrong before(O..so many times). I have given some thought of equalizing the bore on the heavier gun if it isn't chrome lined. Then again I am open to other thoughts even adding weight to the lighter gun. I will admit Stan has the most practical approach...if all else fails.
Ron