i wouldnt grind the heads either. no sense in that..heck they probably wont even fly good once your done. either use them as is and hope you make a good hit and can find the bird...or get a big head for turkeys. i got a 100gr mechanical that flys with my muzzys and FPs. they have a 1.5 inch cut..i plan to use them on turkeys...and yes..turkeys vitals are small.....no room for arrow....another reason for a bigger head. could make the diffrence....