I find that Decline press, and Incline press never leave me with any shoulder pain. I dont know why, but there is something to do with being at an angle. either up or down. When I bench I tend to get internal shoulder soreness, especially when unracking myself with no spotter. I can un rack weights with no pain ever on incline, and decline but not on bench.
Anyway, how easy is decline for you , sometimes it feels like a parlor trick cause you can put so much weight on. Luckily my lower chest is a weakpoint.
What is your guys numbers on bench, compared to incline and decline?