Haven't tried other ROA with M1 yet, so I can't say.
As for my tolerance, it's low. Took 15mg hydrocodone and was pretty high. In terms of oxy, I'd probably go for around 20mg for a day, spread out over 2 or 3 doses.
If you're IV'ing 240mg of morphine and think you can do more, then you definitely have too high of a tolerance. More than likely, you won't get anything out of this. However, I think I remember you posting something about really liking tramadol? If you liked tramadol, even with a high tolerance, then you might give this a shot. I'm guessing you'd need to do at least 200-300mg though, either IM or IV.