Guys remember back in I wanna say the late 90's there was a thing called Power Factor Training. This is basically what CG is talking about. Its partial reps in one's so-called strongest range. It's not vastly different than a powerlifter who does 4board presses to strengthen their lockout.
I remember years ago seeing video of Dusty Hanshaw doing partial lateral raises. He'd grab like 130's and they'd move maybe 8-10" off the sides of his thighs. I have been doing these myself ever since and they are a great compliment to full range reps. Almost any exercise can be done with partial reps to emphasize certain aspects. Obviously YMMV with different exercises and body parts.