Da-Mar their one of the best. They are best know for accurizing slug guns, pinning barrels, doing forcing cones etc. But Dennis and I built a custom slug gun from an 1187 receiver. It's called the "CORSARO TWELVE". There are some pictures of what they have done on the forum I posted under I believe slug gun pictures. Dave Henderson uses them a lot, I found them on this forum. They are in Weedsport NY. In a nut shell the custom gun that was built, was an 1187 receiver, Monte Carlo stock, with a super cell recoil pad, Da-Mar mount, Badger barrel pinned, forcing cone lengthened, crown redone, barrel lapped. trigger job, and custom stainless Meta-life finish. I just finished shooting 2 1/2 inch groups at 150 yards today. Hope that helps.
Deerhunter10