Good points all around captain. If you are able to just accept that this will be a mystery NBOMe and are okay with taking any of them that it could possibly be and 'let it go' / get over it not knowing the ID whether you like the blotters or not... then I would still start with half that blotter or less. But what I mean is that if you assume it is the most potent NBOMe (indeed such as 25I or 25B) you reduced a lot of potential harm right there.
If you end up liking it, at least you have some idea of what NBOMe compounds do and you could explore confirmed 25I and 25B products later.
Are you positive both the small and the larger blotters are the same substance? I assume you are but seems important to reaffirm.
While I would never assume too readily that others can properly and safely choose a good dose of a drug to put on a blotter to me, having blotters (or pills for that matter) in larger and smaller doses - in your case 150 and 300 - is suggestive that 300 may be too much in some situations of for some people. So while we cannot really recommend eyeballing or taking mystery drugs, if you do it is smart to never skip the low dose. Always take the lowest available or better yet only half of that or less. It is an approximation of what is called titration: building up your dose steadily and slowly starting from a very low point.
For your questions on what to expect and how 25B and 25I as examples of what yours could possibly be, I redirect you to the centralized threads we have on those drugs. Use the link to the Psychedelic Index below in my signature and in that Index go to the part where NBOMe compounds are listed and go to the 25B-NBOMe and 25I-NBOMe threads.
I don't really trust the NBOMe class of drugs but I have a number of reasons for that that may not be reflected in younger people in their experimental phase with less psychedelics available, let alone in their collection.
Since my PM system is not working at the moment I will leave this thread open for you to let us know if there are any more questions before this thread comes to an end. Thanks.
