Bought a vial from napsgear 400mg/ml and have injected test for a long time, but never this concentrated of a formulation of test. Significant PIP lasting for a week post injection, a few times now. Not infected. It's not technique, I use needles at work every day. Anyone else notice this from the higher concentration formula? Injecting in the glutes as always have, smaller volumes in face because it's so concentrated.