Been shooting my new ACS and doing some tuning with wood arrows. Brace height check.....nock point check. Now what Im concerned about is the wear on my rest. It is the A&H supplied velco style....my arrows are chewing it up with the quickness on its outer most edge toward the grip. My arrows seem like they are melting that outer edge away, as black stripes run 8 to 10 inches from the back of the fletch forward. I thought at first it may have been the plate so I changed that out for a thinner calf hair one. Still gettin the rug burn tho! Am I over spined? Bows shootin' dead nuts I'll say that much....right where Im lookin! But that wear seems funny and the black melted velcro certainly does too. The bow is 52# @ 28. My draw is 27.5. These arrows are POC spined 60 - 65. Using 145gr point, 3 5" shields. Im only shooting at 17 yrds right now too, so despite the fact that this thing is driving tacks and sounding like it couldnt sound any better, my arrows could be acting funny and Im not seeing it being so close. What are your thoughts?
Try putting some lipstick or something like it on your rest. Then when you shoot you will be able to tell what part of your arrow is rubbing. That is just a starting point towards figuring out what is going on.
You could try cock feather in... if you get better flight then it's supposed to show (or mask) a spine problem... overspined was it?... or something like that.
An ACS is cut well past center, 3/16-inch,I believe, which means that the arrow has to clear more shelf width upon leaving the bow. That could be the cause of your problem.
Are you getting any porpoising in the arrow flight? You could be nocked too low, causing the arrow to hit the arrow shelf as it passes.
With that point weight, on a cut past center bow, you're on the edge of being underspined. If you haven't already, you might build out the side plate a little, i.e., put a piece of toothpick or match stick behind the velcro on the sight window. I build out the side plates on my ACSs that way such that when the arrow is on the string and resting on the shelf, the string will appear to be on the right side of the arrow point when viewed from behind. Just seem to get better arrow flight that way. If you don't build out the side plate, the string will bisect the arrow or appear to be on the left side of the point of the arrow. Those set ups require more spine, and the latter may not yield good arrow flight regardless of spine. Good luck.
Orion is spot on you are under by about 10#. Building out the side plate is an option, I did that for a while but ended up just getting stiffer arrows. Surewood Doug Fir is an excellent, stiff wood and you can get 70/75# in 11/32.