Originally posted by DanielB89: I am completely amazed at how you guys shoot .400 and .500 spined arrows out of #50+ bows. I CANNOT get a beeman mfx .340 to show stiff that is cut to 30.5" with standard insert(around 20 grains) and a 175 grain head. Build a new string for it(14 strand BCY-x) and it made my arrows even weaker. Guess I'm going to have to go back to my other string.