You must be shooting the quicker or speed bows. The fast bows are all arm yankers if you creep. The newer binary and Cam 1 1/2 bows that are not built for speed aren't nealy as unforgiving. Go to a shop and draw a Bowtech Captain and let the bow down. Feels like you have to travel 6 inches to get it to go down.

I'm currently shooting a Sentinal and it is easy on the arm as well. Doesn't want to run off on you. The speed bows all do. I think most everything has a draw stop on it now so the back wall should be the same on all of them.

The true two cam bows had a terrible back wall. You could pull them past full draw pretty easily. They were mushy on the wall. I think a few companies may still make a true dually but not many.