Hey man, nice effort. For me it seems fairly uneven as even for unexperienced some things imo some things range from barely a dose to quite high, but I know I'd have the exact same thing if I had made one.
I'm a little uneasy about suggesting initial doses as I think often I'd call them somewhat or a lot higher than you, so I just wanted to take a bit of a whack at a few that seemed problematic. I know it's your experiences but I think if you're going to out and publish something like this you have to account for a bit more in some cases. No dis at all.
(if you don't care about the rest, make sure you change the tar heroin per my comments)
Oxyocodone(Percocet/Oxycontin)- 15-20mg no more than every 4 hours(orally, preferably without APAP), 10-15mg (snorting), and I would recommend not IV'ing pills in general, especially if you don't have any tolerance or idea how much you should do. This is an Overdose waiting to happen!...however if you must, I would start with probably 10mg, and have a sitter with you.
Seems on the lower side to me, but it's your experience. One thing I'd point out is that oral is going to average higher than intranasal yet your ranges can have you taking twice as much. Also iv bioavailabilty can be 2x as much as intranasal yet you're taking the same amount. High BA via oral + high content of binders in popular brands + nothing too interesting about iv oxycodone vs other opioids makes it a particularly poor choice for iv even for pills.
Morphine- 45mg (Orally), 60mg (Snorting), 15mg(IV)
Hydromorphone(Dilaudid)- 8-12mg (Orally), 8mg (Snorting), 4mg (IV)
Morphine iv amount is twice the oral morphine or your oxycodone amounts.
Dilaudid seems in line with my feelings but quite high for yours. Oral 2x-3x higher than oxycodone, iv 4x as much as oxycodone.
Heroin(Brown/Skag/H/Raw/Scramble)- 50mg (Snorting), 50-100mg (Smoking), 25mg (IV), Injecting street Heroin is very dangerous, especially when you do not know how pure it is, what it was cut with, or how to properly and safely inject, please have a sitter for you first few times.*These dosages were for US Heroin #4, specifically brown powder heroin. For black tar Heroin it has been suggested to use approximately 0.25g
Numbers for columbian #4 seem OK to me nothing dangerous even for high test but it seems to me you used dope on the low end of the scale as compared to your oxycodone numbers, good new jersey dope would be 2x-3x compared to the oxy intranasal #'s and 2x iv. I'd suggest using ranges like 25mg-50mg snorting and 15mg-25mg iv to match account for purity and your oxy amounts.
Your black tar suggestion could easily be ten times your columbian
Mexican black tar #3 varies a lot like the columbian, and is on average a little less potent, but it's not a world of difference than east coast. Traditionally it was lower, and in some places it's a great deal lower because of history but that's the exception. Where I live it's ~40%-50% purity, similar to what i think your columbian is. Unaddicted or non-tolerant users here will often regularly smoke 100mg for a considerable high or 50mg iv. That's about twice the amount as your listed columbian iv dose
Alprazolam(Xanax/Bars) 1-2mg (Orally), Snorting or IV'ing benzos in pill form is just not worth it IMO because of how much filler/binder is in the pill.
Diazepam(Valium)- 10-20mg(Orally)
Most people will get a strong reaction from 1mg of alprazolam initially. I know you said "some people say they need 2mg" but if you don't 2mg may do you as well as 1mg but quickly raise your bodies expectations.
Either way, your valium is equivalent to .5mg-1mg of alprazolam, so one or the other.
*Nutmeg- 2 big or 3 smaller nuts (Orally)
Pretty much a thing to never take, but when i did once I took 1/3-1/2 of that, freshly grated, woke up the next day and was so heavily sedated and groggy all day it was a real problem, would never suggest any amount to anyone but never that much.
Avoid over 10mg in a moderate period of time or it can be pretty distressing, better to say 3-6mg snorted, 2-4mg vaporized
*Methamphetamine(Meth, Crystal, Tina)- 20mg (Orally) 15mg (Snorted)
10-20mg snorted 10-20mg smoked in my opinion.
And yes it's clear I used some bioavailability numbers and equiv charts while I was writing, but I have a good amount of experience with everything there except the nutmeg and everything fits my feel of it, just some reminders etc. I skipped some I kinda had issues with but hey :D Don't care if you use em beyond ditching the tar but I thought I'd help out.
Cheers,