I admit defeat..... HW99 shaking scopes loose! .177, have already fitted a spring guide to get rid of the twang, but it would shake loose the sportsmatch mounts that came with it, and during today's range session has done the same to BKL mounts that were done up as tight as I'll dare before I'd risk stripping threads

It's running just over 11ft/lb with 8.4gr pellets, I had planned to leave it a while for the standard (I got the rifle secondhand but from its condition has seen little or no use) spring to settle, but think time has come to shorten or close up a few coils

Any pointers for how much to start with? Only using it for tin and paper so will happily go down to 10ft/lb