I used to buy jars of pokeballs, and at one point I was tired of being sober that I used to snort one or two a night, once a week. I was able to crush the entire pill - which is about 300 mg (mind you, 300 mg of PILL, not MDMA, pokeballs contain about 85-95 mg of MDMA and the rest of ketamine, caffeine, and filler) - and snort it in one go. I never really snorted anything before pills, besides ketamine, and I was fairly new to it. In my experience, it didn't hurt too bad, and I would just laugh it off, especially around my friends. Pure MDMA burns the same way, but it doesn't clog up your nose as bad.
As for the high, well, it feels more "cracked out" and it doesn't last as long.
Snorting MDMA however, isn't as effective in the sense that more of the pill goes to waste. Sure you get a more intense peak, but you're essentially throwing a lot of the pill away in your nose in the places it gets stuck.