Re: .223 Questions
Using a Cooper 1-12 twist. It seems to really like the 50 grain Sierra BlitzKing, Hodgdon H335, Federal Match Primers, Lapua Brass.
Of note, my particular rifle prefers the low end of the recipe, same hole at 100 yards but it opens up if I push it faster. Seeing just over 3050 fps. Target is eastern woodchucks and I am getting an instant kill.
I have friends that use the 40 grain BlitzKings with very good results but I want to use the heavier bullet at least for now.
I have some 50 grain Noslers I am going to try next. A friend of mine swears by Nosler.