I can't correct the left hand tear Approximately 2" long(tip left of the fletch) no matter what I do with the rest. Allthough I am pretty accurate at 30 yds. I would like to pratice at 50 yds. Please Help!!! Mathews SB XT Left Hand 70# 27" Drop Zone Beeman ICS 400 with short vanes 100 Grain field tips.