Today I had a range day and broke in the new Ballistics Advantage barrel and the new upper from ACME Machine today. The BA barrel required a break-in process which consisted of 5-25 single shots, then 5 triple shots, then 5 5 shot rounds with cleaning between each. I followed this process during this range day visit. I had no issues shooting single rounds but did have several jams and one failure to go into battery while shooting the 3 and 5 round groups. This happened early so I am hoping this was just because all of the parts are new. Later in the day the problem did not happen again. I am very impressed with the groups I achieved and as you can see my best grouping was the last one at bottom right; 5 shot group at .76 MoA.
Quality upper I was looking for an upper for 3 gun and other similar matches. In my search for an upper this one was complete with bolt carrier group included. The complete upper is very good quality. I'm looking forward to testing it out when it thaws out outside.