His center tune is dead on. Walk back method. The arrows are underspined but not enough to matter(2inches left at 20 yards), he is shooting my arrows. I inspected every arrow and there is no damage. It does it every now and then and the arrow is not the same one. I'm starting to get pissed at the thing. Took it to the local reflex dealer he told me that all bows are that loud and not consistent. BS what a bunch of crap. he should have told me I'm lazy and don't need any business.