Sig cross 6.5 creedmoor factory 18 inch barrel. It has between 120-140 rounds thru it and shoots 140-147grain bullets very well. Its mainly shot 143 eldx though and easily sub MOA. I havent shot any liter bullets in it. Im only selling it because I just got a 22 creedmoor barrel for my wife and she wont be shooting the 6.5 creed anymore.