Brian,
The Liberty is not one of BowTech's "Burners".......it's what I'd call the Luxury car ride. Respectable speed and you can't feel the potholes.
My "Birth Certificate" said 30"/70#/350grs=300fps even.
I haven't weighed or measured a thing yet, but I plan to.
I do know that the bow came shipped with a brass nock and 2 rubber eliminator style cushion buttons.....they eat speed like a fat kid eats cake. I hope with my simple Tru-Peep and string loop the speed loss will wash from replacing the factory stuff and then its all arrow weight from there.

I have seen 2 different 29" Birth Certificates and they read 287 and 289fps for the same draw weight/arrow weight.

I plan to hunt with A/C/C 3-60's at about 400grs (depends upon fletch style)so I expect my hunting set-up to be shooting somewhere around 280fps+/- or more if I can wring a little more draw weight out of mine. 70#+ is nothing with this cam.
I wish I had Monday off so I could head out and try to maybe be the first guy to take a deer with one......looks like I'll have to wait until Saturday.