Yea, those robin hoods sure give you a boost! I was checking my setup today to be sure my thunderheads were grouping with my field tips at 25yds and slammed a BH into my nock of my field tipped arrow! It wasn't a perfect robin hood but so close it spit my arrow 6 inches.[:@] My last robin hood was about 2 months ago using field tips at 20 yds. I know better than to aim at the same spot now!! It sure gets expensive however it also lets you know your setup is perfect also!!