You won't find +p+ recipes because there is no such animal.
There is no designation for +p+. It literally means "beyond SAAMI limits".
I'm confused by your description of the problem. If the gun has "the lightest spring possible", it should not need ultra high-powered ammo to eject properly.
I have 3 recoil springs for my G33, one light, one stock and one extra power. Every load I've ever tried will eject cleanly with any of the springs, even loads WELL below starting loads.
It's hard to imagine a compensator could make that dramatic of a difference.
Still happily answering to the call-sign Peetza.
The problem, as you so eloquently put it, is choice.
He is no fool who gives what he can not keep to gain what he can not lose.
-Jim Eliott, paraphrasing Philip Henry.