The Ken Light setup is a very efficient way of doing things. Annealing individual cases is no where near as efficient. I am not sure how many I have done, probably close to 400 so far and I am still on my first MAP gas cannister which is 14.1 oz. It also makes a difference on what tip you are using. I have the "rosebud" tip that came with mine but I have seen some sold with a differnt tip.

Tightgroups:
I suspect you are going to get a lot more than 150-200 cases per cannister once you settle into what works. I did use more case figuring out what works for me.

Dolomite