I recently bought an AR30 and have been going through the Barnes 225 gr. bullets that came with the gun. I am ready to buy 500 Sierra bullets and would like to know opinions on 250 grain or 300 grain. I have looked at the data on both and have not concluded which to buy. I am still learning to shoot this gun and would eventually like to leg it out to 1200 yards. I am not ready to shoot this distance yet but want to train to that level. I am willing to give up "tack diving" at 100 yards in order to get where I want to go. I am leaning toward the 300 gr. Any advise would be greatly appreciated. Thanks!!