Mid November 2016, I published a review of the Burris 1-8 x 24 XTR-II. In that review, I commented on the turret cap retention mechanism. My comments were factually incorrect. You can read the original review here. My original comments were:
“…One area where a minor modification to the turret system design makes sense is the turret cap retaining screw of the wind turret. Burris used a slotted aluminum retaining screw to secure the turret cap. I’d like to see a transition to a steel or hex fastener. The current retaining screw has a very shallow slot which when combined with its soft aluminum construction can be easily damaged while swapping out turret caps.”
While at Shot Show 2017, I spent some time discussing the issue with Mike from Burris Optics who very patiently and generously enlightened me.
After removing the cap covering the Burris XTR II 1-8×24 windage knob, here is what you see.
To zero the scope, you proceed to adjust the wind value. Once your weapon is zeroed, you loosen two set screws, which frees the cap to rotate around the turret so it can be set to “0”. Burris allows you to completely remove the turret cap so you can transition from a covered windage cap to a larger exposed wind adjustment cap.
To remove the cap you need to back out the two set screws far enough so they clear an internal slot machined into the turret assembly. The flat head slot that you see in the picture has nothing to do with cap retention. It is part of the turret assembly and not to be touched.