The conventional wisdom on the SGW forums would be either Mike Orlen or Briley. Mike is cheaper and closer (Maine). He does not have a website, but this is the latest price sheet I could find. Also a thread on opening up a choke on a SxS that seems relevant to what you are wanting to do:

https://www.shotgunworld.com/thread...arrel-on-sxs-issues.543184/#post-4648004



[Linked Image from i.imgur.com]

Last edited by DanGilbertTX; 02/03/23.