Here`s a tip to feel them more in your rear delts.
Instead of just pulling the weight into your face area,concentrate on pushing the elbows back instead.
For your first time trying it,have a training partner place his hands on the back of your elbows and imaging that they are like pads on a machine that you have to push back...........after a while you`ll be fine on your own, and I guarantee your rear delts will pump like never before.