K'dout:- I dunno man... I don't question your knowledge on Opiates. You sure as hell seem more better informed than I am. But, I do know that there are MSContins that contain 200mg of Morphine. Now, that's a pretty hefty dose of Morphine if you ask me. Even though... it does still kinda have the time release on it.
But, from what I've heard and from my understanding, these time-release coating (apparantly it's ALL just in the coating... minus the fillers/binders inside the pill, etc...) can actually be simply scraped off, by merely adding a small swab of alcohol to a cotton bud and rubbing until all the green material, is no longer visible. Then eat pill.
Depending on when you've last eaten, or whatever... you should really feel the Morphine effects kick in at full-force. (200mg is a VERY dangerous amount to take, even orally... without the tolerance.) I think the tablets will take no longer than your typical onset of between 15-45mins.
The Morphine high (when taken orally), as said earlier... is usually a very sedating, inner-euphoria. You quite possibly will find it almost impossible to get off the couch, it's that sedating. Whereas Heroin, IMO... is more of an exterior-like euphoria, making you feel slightly stimulated in the smaller dosage range. The Morphine is definately a very strong depressive-like high.