Just finished a nice build on an ar. Rock River upper, various suppliers on all other parts. Lookin to find a good load for it. I had some left from m last bushmaster I had, but they don't shoot as well as I'd like....... Barrell is 1-8 twist all of my other loads were loaded with 68 - 75 gr. bullets. Any that wants to share some 'ringer' loads,,,,,,,,I'm very greatfull.