By the way you could always go with the 1 3/4 for something in between the 1 3/8th and 2 inch cutting...or if you are set on using the 2 inchers...id crank your bow up to 70lbs if you can handle it and still shoot accurate. by the way...most bows max a few pounds over their top...so in your case your bow would probably max out at 72ish pounds if you have 70lb limbs. So...you could potentially increase your draw weight by like 7 pounds giving you even more KE/momentum in your arrows and then I wouldnt be to worried about penetration on deer with the 2 inch whitetail specials.