One of the members of our hunting group is a youth hunter; and is going to try shooting a 45 lb. bow this fall for elk. What arrow weight and what broadhead would you recommend for shooting inside of 40 yards - for a bow of this pull weight. I'm advising a cut-on-contact head (G5 Montec) and a properly spined(Easton 500) arrow of about 400 grains total weight. Others are saying expandable. Any suggestions?