I picked up 4 of the 6.2 (I think) grain per inch. They are smokin fast, but I notice a loss in impact on my bag target. They are fun to mess around with, but I will stick to my carbon express arrows for deer season. Also if you are thinking about shooting these arrows pick up an arrow scale. I got one on archery talk for very cheap. Use the scale to make sure you stay over the 5 grains per pound of draw weight.