well i just got a dozen of these bad boys and i am hear to tell ya, they PENETRATE. i mean these things are bad arss. shooting out of my destroyer, they shot bullet holes from the first shot, granted i do have a well tuned bow but man o man do these things fly good. i just sent to my local archery shop which has an indoor range of 30 yards. these arrows are 29.75 inches long, v3 series, 125 grain head with blazers and wraps and weigh in at 415 grains even. our local shop has the big 4 foot x 4 foot foam blocks. i blew threw the block and stuck into phonebook on the back side on the first shot. said to my self maybe i hit a well used part of the foam. shot the second, blew threw, went inbetween the phonebooks and stuck 1 inch into plywood that is behind the phonebooks. wow is all i can say with these and i am greatly impressed by them.