I am finally beginning my rebuild and need some help with ring height. I currently have a long action flat back which I will be fitting with a EGW 20moa base. I have a Mcgowen varmint contour barrel on the way and have Burris Mtac 4.5-14x42 that I picked up this weekend. I am planning on getting the Burris XTR 30mm rings but I am unsure which ones I am needing. I think the high rings will be about right but don't want them to be too tall or too short. I am still waiting on parts or I could probably do some measuring and figure out what I am needing. If I need to wait I will but would like to get them ordered. Thanks