Have had good luck with the pmc bronze, xm193 of course, privi partisan, is usually above average, IMI, great stuff, some of the most accurate, and of course white box winchester or remington, this list could go on for a long time, depending on your requirements for accuracy and distance, the Privi 77 grn, in the right barrel will shoot very well and hit hard.
55 grn range fodder, or upping the ante to 77 for longer ranges, the Tap ammo is excellent, but I don't carry it, if i carried the carbine in my truck, I probably would, seen what 55 grn does to gypsum, it explodes quick, expect the same in personal defense.