As has been said, depends on age. The older T-bolts were good, as far as dependability goes, not too accurate, though. All mine have fired and have been consistent, yet certainly not match ammo. But, none of it has been manufactured after 1990 or so. I've never bought any newer stuff, except Rem GBs, Federal 550s, Winchester bulk. Best all-around of those, for me, has been Win. Federal brown box 550s were the worst and gave me just short of stuck squibs on the order of 15% or so. Rem GBs were nearly as good as Win.