This is typical. Unless your prop is suspended in ethyl oleate, it takes a lot of BA to solubilize it in oil. It's the BA that causes the injection pain.
shoot your test testosterone propionate before you train, eg. shoot delts then go to the gym and train shoulders straight after, trust me pain will be very very minor
I am also having lots of pain from my test P. I have seen u stressing this option alot lately. Im going to do my shoot tomorrow in the delt, then train shoulders hope this works out!!!