I posted a couple times about the J nock lifting the arrows off the deck or rail. On my 330 will not no more I swapped out strings to a thicker string bingo. Problem gone. So I'm back to J nocks on my matrix bows. I just can't duplicate the accuracy or flight with flats.
I tried several flats today and yesterday and different inserts. Nothing topped the J's out of the 380.
So I started a investigation on the 330 and found it was serving size.
Now before you flat nock lovers hang me from a tree . I didn't say they didn't shoot good ok. They just don't shoot as good for me out of my bows.