Exactly why I created this thread. It's mentioned in every thread am I always get almost annoyed. I think a better question to be asking when talking about vapor, "how are the vapor qualities?" Ie taste harshness density etc
Mercurial vapors are in my closet, what a trip. More of an adipure type guy.
Anyways.
I would think one or two quick pulls to help the heat saturate the load would be sufficient..
I loosely pack my stems but I still play with my grind daily, for different experiences. Medium fine grind works great. Whole buds taste great and you can break them up as you go. You'll find what works best for you. I don't think it needs much time but maybe a little.