FWT, I have guns with gracoils,bumpbuster and countercoil. I like them all, I would rate them in this order
1. Bumpbuster--Ruck does a great job, smoothe,Quiet and easy to adjust
2. Danhauser Countercoil--hydraulic unit went bad after 15 years use. Cost of new hydro unit installed and shipped back to my door was $54.00
3. Gracoil--plates are very thick and require a lot of cutting grinding and polishing,no matter how I adjust it, it makes noise when I shoulder it. Still a lot better than just a recoil pad. Bill