The pectoralis is not by any means a muscle that holds volume very well.
Rotation is important but this is not one I like to use.
How much you shooting in there?
My pecs are pretty broad (incline DB presses) so they hold tons....
I rotate injection sites on the pecs but they hold 3mL injections, which is what it ends up being between the Sustanon, Deca, HCG etc....
I load up and shoot.
Once you are experience it's actually very easy....and that's with a 25G pin.
I figure if your hands aren't strong enough to push it through you probably shouldn't be using AAS anyway.
I needed to give my deltoids a break.....
DIV