Just for your info, I went to mount my new SIII 10-50X60 today and found that the high Signiture Z rings weren't sufficient to provide bell clearance with a Badger Ordnance 20 moa picatinny base atop a HV conour barrel. I didn't try a straight base w/o any moa but that might have barley cleared. I had a set of X-high Signature Z rings but found out they were just to high leaving the bell close to 3/8" off the barrel, wow big height difference between the two Burris rings. So I used a set of tacticals I had on hand which I sure will leave light ring marks if they're ever removed.
Regards
RJ
Regards
RJ