possible? yes. smart? no... if it hurts, it might be made to that concentration, if it doesnt its likely an over blown number and likely only 400mg/ml if that. IMO
I wouldent go past 400-450mg/ml personally and depends on compound. primo i wouldent go over 200mg/ml as it hurts. test 400mg/ml i like a deca test blend, MAYBE 450mg/ml