On that bow I had it at 7.5 and a hair above 1/2 inch on the nock.So Steve is dead on with his advice.I did play around with many adjustments on it as I would typically do for any bow when farting around with it and thats where it ended up for me.
I shot CX 250s cut to 31 with 200 grains up front.
I draw 30 inches.That bow was probably around 52#s at my draw.It doesnt stack at 30".
If you draw 28 inches a CX Hertage 150 cut to 29 would be a good arrow to start with.Play with point weight.It helps to have many points from 100 to 250 grains to play around with when testing carbons in my experience and its a good idea to invest a little $ in different sizes.
If you want a heavy arrow the 250s with more point weight and cut to 31 inches would be worth a look.I would try anything from 200 to 300 grains up front on those.
You can adjust spine with carbons by lengthing and shorting ofcourse.
250s longer and 150s shorter would be appropriate.
Whats your draw length?