Look at the ones from Skeets, in the Brownell's catalog. I have had one for several years. They are very reasonable and their service is very good, if anything goes wrong. As Eightbore said, you need one that will measure the main part of the bore, as well as the choke area. The key-ring style tell you nothing unless you know the bore size, which isn't standard, whether it's been honed or not.

> Jim Legg <