Some other thoughts
Why a dual edge? Because that is the way we alway did it and always sharpened our knives. Because the force is equal on both sides of the blade there is no twisting of the head.
Why a single edge? Ever think about why almost all wood working tools have a single edge grind? After thousands of years it must have been found to wedge out the chips most effectively and hold up the best. Not exactly the same thing we are trying to do with a broadhead except when we hit something like bone. Ashby's tests show this. However this kiind of grind does impart a twist to the head because one side has more surface area. I guess therefore one must be carefull to have the grind match the helical of the fletching. Don't want the arrow turning in one direction only to make it reverse direction when the head hits something like a shoulder blade.
Since I have been shooting Rocky Mountain Premier 100's since they can out about 17 years ago and do not intend changing until I use them all up, I will probably just stick with the dual grind that came on the blades.
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