Is there a force between the standard recoil back thrust vs the brake pull away?
Yes, that is why a scope must be rated for both positive and negative g forces, most are not. Further more there are a lot of dynamics going on other than simply recoil. Notice the 34mm tube S&B scope as well as the picatiny rail flexing in the video. Extremely tough on scopes. Sometimes scopes that aren't rated for such abuse work, but why chance it.
