I used to have a Sheridan and it had the barrel mount that was made for that rifle. It obviously wasn't doing it's job and the old guy extended the gripping surface with liquid steel!
That crude home repair worked with a Bushnell 3-9x Banner for many years. I may still have the mount---I took it off so I could sell it as it was ugly. I may still have it.
I will let you know if I do!

Ken