I called a math nerd friend of mine , if he could shoot he would be dangerous. 308, 175 grain, 2650fps his rough answer 2.85lbs/sec impulse. 10-13fps 17-19 ftlbs , that should cover your variables a bit. i asked if he could figure out the BCG . Yup i just need weight , speed , spring specs ect and I can get you s rough idea. He laughed though and said theres not a lot of energy there few lbs ? The double or reverse recoil is tough on older scopes and cheap scopes. This is not a mystery but todays scopes are better even the cheap ones. In my mind if it failed on a scar it would fail on a lesser rifle just might take some more time. Fun stuff, really. Again if i spent $3k on a rifle I would most likely either buy 2 scopes for my needs or one nice scope.