I haven't found any of the 5.56; I did pick up some of the 7.62x51..
Shooting it from a bench rest, I ran into a new problem.. At 100 yards, I was shooting, I would see the first shot, but could not locate the follow up shots thru the scope, even with making slight adjustments to the scope, I was having a heck of a time understanding what was going on. That was until I actually went down to look at the target close up. Yep, I was just enlarging the same hole.. Having 3 bolt guns in .308, one gun really likes it, one gun loves it, and another- well, I'm having issues with that one & its scope.