Hello, Kind of a newbie here. I just bought a pair of Burris XTRs for a Falcon Menace scope to mount on an AR-10. I've heard that even these rings will allow the scope to slip a little so I'm wondering if I ought to get some ring inserts and if that will help? And if so, what do you all recommend? I plan of doing more benchrest, precision shooting gun) rather than off-hand, rapid fire. So I won't be blasting away without taking time to aim. Thanks!