I tried some of the blazer vanes on thin diameter carbon shafts and they really made my big fixed blade broadheads fly very well. Really good speed and accuracy. I'll bet a lot depends on speed and angle. I didn't put a very heavy spin on them.
What does "gauge" mean anyway? As used here gauge means the number of round lead balls the same diameter as the inside of the barrel (aka the bore) that it would take to weigh one pound. It takes 12 lead balls the same diameter as a 12 gauge barrel to weigh a pound. The smaller 20 gauge would require 20 balls of that barrel diameter. The larger bore 12 gauge would require 12 lead balls of the bore diameter to weigh one pound.
In general the number of pellets in a shotgun shell...