Well, assuming you are talking about XX75 2315's, and your arrows length is 30" as well, which it is probably not, your arrow weight would be around 524 grains. I would not be able to guess your speed, and as such, not your KE. There may be others on the site with a similar setup on the Outback, so they could give more input.

As a future reference, check out this site, has tons and tons of great info...
http://home.att.net/~sajackson/archery.html

JMAC