I think it is an issue with the batch - I first ordered a kit of it in May and it was smooth as butter. So I more recently ordered two more kits … both exactly as you noted … crazy pip, flu, and wild infection with every attempted shot. I purchased a sterile vial and .2 Whitman filter and filtered some thru that which helped a touch but still unbearable pip and the shot keeps branching out to neighboring muscles.
QSC - is the test 150/primo 150 a new batch yet? The first one I got was literally perfect but the current 2 kits are both unusable. Did you do new brews of that with MCT oil now, too, by chance?