Back40 I usually lap rings and have alignment tools when using rotary rings or any other type ring including Ruger Rings. I had no problem with Talleys in that area in fact when I mounted the scope brand new Leupie 2.5x8 and collimated it was within a couple of clicks of dead on . I am not sure where Vapo is getting the dovetail from or the inferences to Sako . www.talleyrings.com maybe this will help you.