According to the ONTarget software with that set up you are very weak, even a 300 would be slightly weak, but barely in the green.

What is your finnished arrow weight and speed if you know it, then I can calibrate the software to your exact set up.

I checked some carbon impacts, and the 7500 come up about the same as the epic 300's. They do not list carbon impact as a 55/75 designation, and neither where any of the carbon impacts I owned. Are you sure they are carbon impact arrows?

Either way according to my software you need somewhere between a .300 and .320 spine. The easton C2 Obsession, and C2 HD green spine better.

You can get weak arrows to paper tune, I have done it. I got 1816's to shoot bullet holes with my Mighty might set at 26 inches and 60 lbs. That is waaaay weak. Yet another reason I hold no stock in paper tuning.

Paul