I am not using Stans Test C, but I am using his Test E and P. when using the Test E by itself, I also noticed some tenderness, but his Test P no PIP at all. So I have been drawing the Test E and P in the same syringe and of course putting on a fresh needle before injecting. Since I have been doing this. Their is no PIP at all.
I also use either a 25 or 27 gauge needle. The 27 gauge is much slower to inject. so if i am in a rush, i use the 25 gauge.
Oh ya i rotate my in jectio s between the glutes, delts and SubQ and had slight soreness with all injection places when just using the Test E. I absolutely love mixing the Test E and P. It has completly elimanated the PIP - YMMV.
Another oh ya. I just added Primo to my cocktail and zero PIP with all 3 oils mixed. I think Stans Test P has pain free pixy dust in it.