Tight. Loose definitely pulls through. I have a big bowl, and I don't always pack it all the way full, because I don't smoke that much in one session, so it pulls through alot. Lol, it's a huge ass bowl, and sometimes a pain in the ass. It's wonderful if your smoking with other people though.
Tight that bowl , you jusit need to light it once to get the cherry goin , and pull like crazy you will def get that nice headrush you felt few times , hitting bong