I recently bought a new HOYT ULTRAMAG and as I'm fine tuning everything in on it, I've found while shooting on level ground that I can use my 10 yard pin all the way back to 40 yards.. Is this normal?? I am using carbon arrows, and pulling 311 fps... I am thinking it is because the arrow is moving at such a good pace.. Any answers would be greatly appreciated... The bow is set at 71lbs. and a 30 1/2 draw length...