That's a problem with it a lot something like more than a half is just not available. I didn't think that applied if you bypass the stomach, what happened when you tried to snort it? And what are the possibility that it's due to the inactive ingredients like binders?
I have zero experience with morphine I've never taken it although I've heard from people who've gotten it in the hospital that it is the itchiest of the opiates. I guess it provokes a histamine release which you can feel if you injected too quickly.
All I get are stomach cramps from codeine and I haven't done heroin in 20 years. You could smoke it because black tar melts and vaporizes in a horribly acrid smoke