But you’re injecting less oil and more product, that’s likely why... try IM 30mg..I do TRT using prop ~30mg every day subQ. Other brands have no issue doing 0.3mL at 100mg/mL concentration, so I'd be very curious to see if this PIP issue is isolated to the high concentration, or if it carries over to Colonial's regular concentration propionate. But not curious enough to throw another $120 down the toilet!