I know lots of folk do the shimming in the rear mount, but Im still concerned (or would be) that the angle of the tube through the front mount, even though its only a matter of points of a degree, might cause some damage... demands even more sympathetic tightening etc.

Someone suggested a strip of film.....

Even so, my scope is adjusted via the elevation turret so close to its maximum it surely wont do the erector tube springs any good in the long term to be compressed that much for such a long period. So to my mind, the scope still needs to be optically centred and when it is...... it will need to point downwards somewhat to achieve a zero. Enter adjustable mounts

I cant see how the adjustment works from pictures available on various sites, but the best (most expensive)... seem to be B Square, Ive mailed them for some information.

The point is...I suppose, that having invested money in both scope and gun, did I ought to be frigging around with bits of film to make things the way they should be, but thats just me.