Quote Originally Posted by jjjohn View Post
Put an arrestor block behind it ? as you say you have 2,
if the gun kicks that bad their are more problems than a scope sliding to think about.
It is, from new, an untouched 177 and I gather this calibre kicks a little more than 22. I suspect the late '70s/early '80s scope mounts were not as good as the modern versions and I think this is the problem.

Probably, Biker Bob's physics are sound.

Rgds
A