Be careful, somewhere around ~12-15 mg (depending on ROA and tolerance among other things) there may start a steep bend in the dose-response curve... it seems suddenly effects can become a lot more intense with influence on judgement (from hypomania or even the real stuff), so don't increase your dose as enthousiastically as you might want to!!
Seriously, several members of this forum including some of the most knowledgeable / wise and restrained have made mistakes ending with hospitalizations and injury.
QFT
My wife has now been in the psychiatric ward for 3 weeks, in regards to half-time etc. of 3-MeO-PCP her drug test was still positive for phencyclidine (PCP) just couple of days ago. The steep bend in dose-response curve is indeed steep as hell, please do be careful. When your blissful manic episode makes a sudden shift into a full blown psychosis, it's no joke.
The stimulation from 3-MeO-PCP seems so "functional" in comparison to MXE for example, that it can and will fool you when you start redosing and overdosing. It is mania, period. In the midst of a crazed out monologue with pants down scratching your penis with a stiletto knife you have suddenly fallen in love with because the weapon reminds you of a girl you once loved very much but unfortunately she stabbed you in the back, damn, you remain sort of lucid and take notice "why do all these people around me think I'm crazy, what's the trouble, can't you guys comprehend there is a possibility that the Holy Grail is, in fact, my girlfriend's vagina and she is also my mother btw but that's not the point... capisce? catfish..."
It is because you really have gone a bit mad and are actually a crazy person now, it is a very, very unnerving sight for your friends and loved ones.
I believe what we had recently is 3-MeO-PCP HCl, the new crystalline and, well, more like salty kind of salt so to speak, easily soluble in water. Back in 2011-2012 when I got into the 3-MeO-PCP frenzy it was the expensive HBr from UK, floury sticky powder not at all soluble. Then along came the very inexpensive HCl in december 2013?, appearance quite identical to UK HBr but more potent, imho.
Few years ago when 50 mg cost about the same as 1 gram these days, it was very easy not to abuse this drug because it was so damn expensive!
Our preferred ROA has been nasal, ~5-10 mg lines but frequent redosing, I usually like to swallow the drip eventually or hold it in my mouth so I guess it's a bit of mix between nasal, oral and sublingual for me mostly, heh. Rectal administration seemed to provide weird and uncomfortable results, only a few instances of butt shots in early June this year, possibly an overdose of some kind because I used same dose as I would snort up my nose... I have also done some i.m. injections couple of years ago but it was also very hit & miss, crash and burn. I recommend nasal for a more stimulating and faster effect, oral and sublingual for longer lasting smoother experience.
I've still been using almost daily for about 5 weeks now... but tapering - or living in self deception

blah.
The first night of use in early June after 6 months break from all dissociatives was sort of "meh" at first and I actually thought I had been scammed and poisoned at some point, probably an overdose because I ended up doing multiple lines of various doses, totaling to 30-40 mg maybe? Yikes. During the next couple of days and prolonged (ab)use I was back in the mad manic 3-MeO-land we have learned to love and hate.
Peace.