Here is the best way of doing Mscontin or regular morphine if you dont like to use needles or if you dont plug.
First with mscontin you need to crush them up and then dissolve in warm water in a spoon ( it will turn into a waxy ball of goo in the water).
Then you have to heat it but dont let it boil, and once you see the whitish foam start to come off the wax start moving the pieces apart with a paperclip (try to break it up a little) and once you've done that move the waxy pieces to the sides of the spoon.
Then you suck up the liquid with a eyedropper or oral syring and squirt it up your nose, since the morphine is in very warm water it will be more water solubule (sorry for bad spelling) and you will get a much better high then you would just snorting the powder trust me.
Then if you want you can also eat the wax thats left on the spoon, it will taste like regular wax since all of the morphine has been taken out of it.
And if its just IR morphine just dissolve in warm/hot water and squirt it up your nose, you get a really nice rush from it and im almost positive you get more than 30% bioavailability.
I have done this method a few times myself so I know it works, Have fun