Carlson's choke constrictions match the generally accepted openings for different choke types. They do not, however, match the constrictions that Browning has designated for their chokes of the same type. One needs to check the constrictions to be sure you are getting what you want/need. That being said, the performance of these chokes is an excellent value. Physically, they differ from the Browning chokes in not having a "brass" collar/seal at the barrel end of the choke. The Carlson choke has this collar machined into the surface of the choke. Nevertheless, the choke does not loosen afte repeated firing, so the machined collar appears to do its intended job.
Pros: Exact Fit
Cons: Constrictions do not necessarily match Browning choke sizes
This review was written in the old system and had content requirements that are different than reviews written today.