i spect once yer arrows are sighted in at that weight its just ck'ing out where your BH's actually hit. mech. seems to right on or very close to field pts. fixed BH's including those you can replace blades in may or maynot hit where the fields tips hit. usually you hear of decent BH's in the forum's and by harvest posts. i have used steelheads/slicks/boltcutters to take my game so far.