If you reload you might want to try the 69gr Sierra matchkings for accuracy. I was able to get one raggged hole groups out of a couple of bull and heavy barrels with H335. That load is also what I use to see how well a barrel can shoot as it shoots well out of most of my uppers as long as the twist is 1-9 or faster. That was also back before the flat top receivers came out and I was using an A2 upper and a leatherwood carry handle scope mount. I found if I removed the scope it would be within an inch of where I had prevously sighted it in at which isn't bad at all.