Would you believe me if I told you that today I shot a cloverleaf pattern at 100yds with a 4x scope and factory Sellier & Belloit ammo. We have a nice airconditioned shooting range at TargetMasters in Garland, Tx. One of the shots that comprised the group was after I removed and replaced the scope to test any shift in impact. Works great, obviously. Nice to finally have a drilling without flaws. For a while I thought I was the "bad drilling Magnet." (Maybe I'll start a thread on that!) Try the CZ rings...Steve