Are you performing the military press on the same day as your other pressing movements?
Edit: Ok, since it seems your not "here" right now, I'll elaborate.
If you are doing the above, stop. Move military to another day. If you are doing a push/pull split with all three movements on one day, you need to break your "push" into horizontal day and vertical day and do military plus another exercise, probably DB's of some sort after.
If it's done on a different day already, are you doing military first? If not you should be.
If you are doing a split routine, are you doing chest and shoulders together? If so, change it and get shoulders done 2-3 days apart from chest and do military FIRST on that day.
my routine is: 1 - squat, quad exercise, abs, calves 2 - bench, db bench, chin up, tri pushdown, bb curl 3 - off 4 - deadlift, bb back raise, abs, calves 5 - military, db row, bb shrug, same arms as day 2 depending how i feel.
Ok then. A couple of suggestions. I personally do two OHP's on my shoulder day. Not that you should, necessarily.
But you might try this. I rotate my first OHP exercise (which is always with a bar) between standing military and Smith High Incline Presses. After those I usually do Arnold presses. I have not stalled on either since I started this. Or you can just drop it altogether and do something else for a bit and then go back.
I have been doing incline bench plus low incline bench for chest. No flat bench. I think this maybe helps a bit in the OHP. Not sure, but it seems too. I notice you are not doing any incline pressing. Any reason?
Maybe your shoulder health is what is keeping you from progressing on military?
I have had similar issues with my right shoulder in the past. This was my fix- I stopped horizontal pressing for 6 months. No bench, incline, DB bench but I still did OHP. I also put a BIG emphasis on horizontal rowing, mainly BB rows.
If you decide to do something like this to fix your shoulder, use the time to work on your military press. And once you start pressing again, don't neglect incline too long. I think you will get better OVERALL chest development if incline is your main focus.
Before I tore my rotator cuff I was never able to put plates on the bar for militarys. After I tore my shoulder and successfully rehabbed it I was soon putting plates+ on the bar so I agree. Proper shoulder health is key to increasing your military press.
Internal rotations, external rotations and the broomstick stretch in the IM thread above really got my shoulder back into pressing condition. Except I only do them once a week, more than that is too much wear and tear on my shoulders.