I've never got H335 to shoot any where close in my AR's. Have not tried it on my new 20" barrel. But my min spec 24" 1:10 twist bull barrel did a lot better with TAC, Varget and CFE-223. The old barrel that I shot out loved the Varget and the 69gr HPBT-Match bullets. It had a 1:8 twist with a Wydle Chamber. This barrel would not shoot anything accurate under 65gr. Unless you consider 2 moa accurate at 100 yrds. That's one of the reason the barrel got shot out, me trying to get it to shoot the lighter pills. After 5500+ rounds down the tube it finally quit shooting the 69gr MK's, so I replaced the barrel. I did try reworking the chamber and re-crowning but it did no good. I've finally discovered that the Hornady 55gr FMJBT cheap bullets like a heavy rifling, tight bores. Both of my guns that shoot the cheap stuff good has a land ID of 0.2187" or smaller. The barrel that did not shoot them good had a 0.2190" ID. The good part is all the work I did on trying to get it to shoot, paid off in my other guns. Did not have to rework the loads. Which is good since I still have around 1500 still loaded and ready to rock.