In order to dose and feel anything you need to dose sublingually. Do not swallow the blotter. If you swallow it you will waste it and nothing will happen. Keep it between your teeth and gums or under your tongue for a good while.
Also, if you think you know what the exact dose of NBOMe is in your blotters think again. There's no way to tell. The best anyone can do is give you an estimate. Just like there's no way to know how much LSD is in LSD blotters. The only way to really know is to have it tested in a lab which would be very expensive. The NBOMes can be pretty easy to overdose on and people have died from taking too much. Be sure to work your way up with the dose starting with 1/2 a tab, then waiting a week or two so tolerance dies down, and then upping it to a whole tab.
The blotters should more or less be around the same dose/amount of chemical, but it won't be exact. Please don't treat it like LSD and think that if one tab was great you can take 2, or 3, or 4, or more to have a better trip because you may end up dead or in the hospital. I'd say 2 blotters is as high as you should go unless you feel the tabs are extremely weak. Just exercise caution with it on how much you dose.