Yesterday was cloudy, overcast day with no wind. A perfect day for some arrow flight testing. I used 2 shafts with 3" Silent Knight vanes and 2 shafts with Flex Fletch 360 vanes. Both were 4-fletched. I shot 20-30-40 yds. I could not tell a lot of major difference between the two fletchings. I was using like shafts and Slick Trick Standards 125 gr. BH. The Silent Knight is suppose to be quieter and produce a little more arrow speed. I did not chronograph and did not have my hearing aids in so I really could not detect the flight noise difference off the bow string.
At the end of my shooting session, I was tired and screwed in some 2 blade VPA vented BH's just to see what would happen at 20 yds. I have to say they were true darts with the Silent Knight vanes.
After all is said and done- Watching my arrow flight and target hits, I tend to favor the 360's and will continue to use them. I have high confidence with them as I have seen their results on previously live animals!