i think if you could do say 50s for 6-8 reps to 90 degree you would have to drop to say around 40 maybe 35 kg to go lower for the same number of reps which would give your shoulder far more movement there for a better shoulder work out. as Kieron said a lot has to do with ego it looks better lifting 50s than 35s lol. in my gym its the skinny ones that go 90 then as the weight goes up the 90 becomes 45 degrees and they wont be told as there ego wont allow it
