I am wanting to lighten up my arrows I'm at 380 total grains now with. 70 pound draw I know the lightest I can go is 350. Is this a danger zone to crack limbs? I was thinkink about feathers and I weighed them and they are twelve grains less so now should I cut my arrow a little? I feel most comfortable with my arrow a little past the riser. Where does everyone like their arrow on full draw?