I have been doing a lot of research on the 6.5 Grendel reading and watching YouTube and other forums. I did not have a thousand plus dollars to put into something to play with and use mainly for deer hunting inside 300 yards so I went with a Bear Creek Arsenal complete upper for $339.99 from Primary Arms. It is a straight fluted 20" SS with 15" M-Lock rail float tube. I have a Bushmaster lower with a CMC trigger that is between 3 & 3 1/2 lb crisp pull that I am going to mount the upper on. Will give a report when I get it and shoot it some. By the way, what has been your experience on powders and bullets that work for you?