I've always struggled to progress most with bench press, and now I'm 99% certain it's because of my right shoulder. When I do a windmill stretch with a 5 pound weight in each hand my right shoulder pops / cracks a couple times on each rotation, but my left shoulder is smooth as glass... that's probably the easiest way I can think of to describe the issue. I've always gotten the impression that it was weaker than my left arm but never did much about it.
I'm not sure why my right shoulder is a problem since I've never injured it in any way and I didn't do anything like tennis / baseball / football that could have strained it. The only thing I can think of is maybe surfing but then it'd be both shoulders.
I'll probably try to see some kind of physical therapist when I get a chance, but has anyone ever experienced this and had success treating it with daily stretching or anything?