deerhunter86, look at this post by jbpmidas http://www.msgunowners.com/firearms-gallery-f19/my-ar-put-together-t4069-40.htm?sid=6becf4731b97226600c6583970ccfeda#39017
and also this post
http://www.msgunowners.com/reloading-ammunition-f11/first-real-reloading-experience-t4349.htm#39020
These groups were shot using the Nosler 69 gr .223 Custom Competetion bullets.