[] 5 Shot, thanks for the information. I looked at these head and they look sweet! I haven' t taken any out of the package yet but plan on buying a three pack this summer for testing. I' ve used the NAP Thunderheads for 20 years and have had good luck. I' ll still probably use them for hunting but am always tinkering around with other heads and such. Am also going to try their Spitfires in some tests. 25 years ago I used their Razorbak 5' s and had good luck. A friend of mine took several deer, bear, and a nice bull elk with the the rotating 5 blade head but they too were a one animal head. You could change the blade cartridge if the ferrule wasn' t bent.