Look up some shoulder anatomy and see if you can pinpoint what muscle is actually in pain. I had some significant shoulder pain in what felt like my middle delt. I researched more and looked into where the pain was and what muscle it could be and I found out what was actually hurting was part of the rotator cuff. I prescribed to the bro workout routine for years: bench, curls and talk shit.
In order to remedy my pain, I had to do very light weight cuban presses and started doing barbell rows. Fast forward 2 months and my row strength is nearing my bench strength. I have also had no pain in either shoulder since then.
I also noticed that you said you warm up with 50lbs less than final sets which are 185lbs. I do final sets close to 300lbs and my warm ups start off at 95lbs. You have to keep in mind that warming up just means getting blood flowing to the area.
Good luck man.