Liberty speed vs. Outback
A few weeks ago, I told you that I shot the outback and liberty, and slighty preferred the ouback. They were close, but the outback was a little quieter and had less vibration, kick, shock, etc. Not a big difference, but noticeable. When I made this comment to a local Bowtech enthusiast, he said, of course the outback was quieter, they do not shoot as fast as bowtechs at the same poundage. Knowing bowtech's are among the fastest bows on the market, i thought this made sense. The next time i was in the shop, I made sure both bows were set a 60lbs (liberty and outback) and used the same 380 grain arrow to test the speed. To my surprise, the outback shot 263 fps while the liberty shot 244 fps.
So, despite the outback being faster at comparable settings, it was also quieter, smoother, etc. Interestingly, I still felt like the liberty had a smoother draw cycle, though not hugely different fromt he outback.
As for how this relationship would change if bow were set a 70lbs, i don't know, but the above is based on my experience, without partiality toward either bow.