We pretty much only shoot reloads so I'm not sure about the factory rounds. The .223 we usually shoot 55 grainers, mainly because thats what my 700 likes so we use them in that too and it shoots great. It's not quite as accurate as my 700 PSS, but it is also about 1/4 of the price. The only problem we've had is not ejecting fired casings. But its an older model and our new model .270's work fine.