are these arrows to light for hunting. My brother recently purchased a Samick Predator Recurve 55# @ 28". His draw is 30 so I figure he should be pulling around 60#'s. We figured it out tonight that he would have a finished arrow weight including 125 grain broadhead of roughly 450 grains. Is this going to be too light for hunting purposes? Also is there any way to make these arrows heavier, ie weight tubes or heavier inserts ? Thanks for the responses.