Bugger me diagonally if I know, do you really think I shove a ruler up my ass and stare into a mirror? I'd guess 'a bit past the end of a 5ml rig', as for caps vs tablets if ground up...I am guessing, is all, solely based upon the time a thin walled capsule takes to begin taking effect, vs a solid tablet needing to disintegrate. I've never taken oxy IR pills, or IR tablets, only oxycontin and IR caps, but it seems by far more logical for there to be somewhat of a delay, based on observation of the time it takes even an uncoated tablet to dissolve fully vs say, within minutes, the likes of even a thick-walled gelcap such as for example, chlormethiazole takes, and even chlormethiazole caps take a few minutes to open (one can feel it, it burns like alcohol, when they burst) and they open within a couple of minutes.
It'd take a few minutes to absorb via nasal or rectal mucus membrane, so it makes sense for a similar time through mucus membrane irrespective of location, given the multiple samples, including sublingual administration of the capsule powder contents, and the capsule walls of those things are really thick, compared to most gelcaps. So I figure out it should be a little quicker, but whether its a practical difference or not, I'm not sure. Probably, by a bit, but not by a huge deal I guess.