pharm heroin dosage 30mg amps

[imighthave]

lets say someone usually injects 1/5 gram of black tar heroin no probs, would 30mg amp of diamorph (pure heroin) be too much to inject?
thanks
hope i posted it correctly to not get closed this time

 

[Violenza666]

Since heroin varies in strength it's always safer to test it with a bump before you inject it. Are you sure it's pure?

 

[Cane2theLeft]

If you're BTH is more than 15% pure, 1/5th of a gram is stronger than a 30mg amp.