I've pinned 500mg from the now defunct colonial labs (about 1ml)... would not recommend at all. It caused wicked swelling and pain. 2nd or 3rd day I was legit getting worried. My wife was like WTF did you do??? lol.. since it didn't seem infected I played it cool and 2-3 days later things calmed down. But, I won't fuck with anything over 300mg/ml anymore.