I THINK MORE IMPORTANT IS THE C REACTIVE AND THE INDICATORS OF A INFECTION.. IM MY CASE.. I had swelling.redness.fever.. around inj site..
I can only speak for myself.. I think the amount of oil per inj instead of concentration is what causes my pip..
so 250ml per ml of test would cause less if any compared to 2 1/2 ml of 100mg prop...
For me 2 ML's of Test E 300 is less pip than 0.5 ML's of Test E 500.
I don't think you can compare Prop vs E, as some PIP from one and not the other. I don't get any PIP from Prop...