I'm getting contack on the cock fletch. My arrows are fletched cock down & I use a shoot thru. Its not bad, after a bunch, maybe 15, shots or so you can see the fletch is hitting something. It was set up pretty much square & I raised my string loop about 1/8 but its still hapening. I'm shooting 2216's 28" at about 68# with 100 grain points. Should I raise the loop more? Should I increase the spring tension on my rest? The arrow clears everything if I draw it thru by hand.

Thanx in advance.