Re: How far to pull the bow back?
Pulling "hard" into the wall is a great idea if you have a draw stop that actually stops on the limb. If you have a draw stop that contacts the string you can easily go beyond where you should. What you are describing could easily be "overotating" the cam....which would indeed increase arrow speed. Without seeing you shoot it's impossible to tell if you are just getting it to full draw or are actually overotating it. Any chance you can post up a couple pictures with the bow drawn in both the ways you describe with particular attention paid to the bottom cam???
Chris
"Do not go where the path may lead,
go instead where there is no path and leave a trail."
Emerson