Jacob,

There are lots of variables including draw length, etc.  For example, each inch of additional draw length usually adds about 10 feet per second of arrow speed (more energy)!  

I have friends that shoot bows with a 50 pound draw weight and they are successful with mechanical heads!  If you are in doubt, use a quality fixed head like G5’s Striker!  I used it for years with much success!  For more information, check out:  http://www.basspro.com/G5-Outdoors-Striker-FixedBlade-Broadheads/product/79647/

Enjoy creation,

grant