I used NAP spitfires for several years because 10-20yrs ago fixed blade heads were not as good for accuracy as the newer ones in my experience - no failures. I shot deer from about 10yds out to 37yds (longest shot on a whitetail - bigger east Texas deer, not the smaller hill country deer). I have always shot 70-75lbs and carbon arrows (not ultralight, but lighter than aluminum). On that 37yd shot the arrow was not only a complete pass thru, but stuck in the ground at least 10yds beyond that deer. Keep 'em sharp, keep 'em working properly, and keep the arrows flying straight and should not be any issues with penetration.
Some of you guys are like the guy that swore to me that you NEEDED a 30-06 for Texas deer when a decent bullet in a 223 will do.
