RE: cutting diameter
Ok. Wow. Well lets see. If I have something that cuts a 2 inch slice, and I have something else that cuts a 1 inch slice, the 2inch slice will cut so much more tissue and create a bigger wound channel and a much easier blood trail. A 2 inch cut through a deers heart will expell alot more blood than a 1 inch cut through a deers heart.
YES, it will create more friction as well, but thats what happens with such a devastating wound.