On a whim (and because it was on sale), I just tried some loaded Superformance 53 V-Max ammo through a Mossberg MMR Hunter (20 in., 9-twist barrel) I had given up on because I was convinced this "low-end" AR would never group, despite reviews that claimed it was capable of decent accuracy. Was surprised to watch bullets go into a 5/8" area then follow the scope clicks exactly; a little vertical stringing as the barrel warmed, but hey, I'll take it! I'll try again in another session to be sure (a lighter/better trigger would help the odds), but if it's close I'm definitely keeping this gun after all. I should be able to get near duplicating the factory rounds (?!) with available components.