I've had this problem for quite a while and have tried several different hammers. They all gave me hammer bite. Firmly believe that the problem is with the aluminum frame downward sloped beavertail.
Those of us with fleshy hands between the thumb and forefinger and grip high, have the skin come over the rear of the beavertail and it's pinched during the rearward slide movement between the hammer and the beavertail. The harder and higher we grip, the more flesh comes over the rear.
One question you might ask CGW is completely grinding the cocking piece off of the hammer. Short of extending the beavertail, this may be a viable option.