Strange that people have shoulder issues for pressing. It’s the contrary for me, benching gives me shoulder issues whereas I can train press with high frequency and intensity without any problems. Benching on the other hand, 1 week heavy session and I can feel discomforts already.[/quote]
Shoulder issues in benching can be cause by not keeping your elbows tucked enough.
It think the main shoulder issue in OHP is caused by the fact that each rep is also a front delt raise. To see what I mean, just do the exact same motion you do for OHP, but keep your arms straight the whole time. The shoulder movement in it is a full ROM front raise which ends with your shoulders at the very limit of their ROM. That puts a lot of strain on them.