Ausie-guy, I ran your setup through archers advantage and the 5575 are showing week in spine for a patriot dc. To get better spine I would shoot a 7595 with 100gr screw in point at 28"long. this arrow will put you in the green on spine. also another arrow that will shine ok and shoot faster is the carbon express 300. It is the same spine and is around 50gr lighter. spine is very important in tuning an arrow for optiomal preformance. I hope this helps. Bowjunkie