Thanks for the replies. Re my purchase decision, I work at the company where I am ordering and qualify for a "pro" deal at about 50% of retail, hard to argue with. Re the bore size, I had noticed while researching choke tubes for my Beretta Silver Pigeon S that there is a good deal of variability in bore sized from one gun, and one manufacturer to another. Just another case where there is more than one right answer, I guess. Thanks, Hattles, for the measurement, I had not seen such numbers. Good shooting to all.