Everyone I've ever bought came sharp. I always touch them up a tad but, they come sharp.
Take them back and trade them for some sharp ones.
Or, get in contact with NAP and as them what's up with the dull heads. They may be sending them out dull. To save a buck (dollar)???
The same thing happened to me in the past with the Thunderheads. I took them back to the store and basically got the "oh, well" response. Finally managed to talk the owner into opening another package of the same broadheads to see if they were dull. These were razor sharp and he let me exchange them. Never heard what happened when he sent them back NAP, but I think they are slipping a little on their quality control. Whenever I buy any now, I check them at the store before leaving.
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...