I bought one in 2004 when it came out, mine is also 70lbs with a 29" draw. It's been good to me, I've taken several critters with it.
I had mine set at 64lbs and it was shooting a 420 grain arrow at 265fps, not a speed bow by any means but plenty fast enough to blow through everything I've shot.
I just switched to the Hoyt AM35 but I'll be keeping my Outback as a backup bow.
As far as the turkeys go I think I'd be looking at your broadhead selection if you're looking for something that won't blow through.
If you're a Hoyt guy you might want to swap out the Mathews grip for something a little slimmer. I swapped mine out with a Torqueless grip and it made a huge difference with bow torque.
http://www.torqueless.com/Coon