I've seen this topic discussed in other threads and thought it deserved it's own. This way all of the available information is in one spot when you do a site search.
I just started running my 520 this season so I have no experience burning buck. Here are some of the questions I have about switching to this size coal.
What are ballpark air settings? I know it's not going to be accurate but it will serve as a starting point.
Are you putting a strain on parts that would otherwise be fine burning rice? If I switch to buck I'd like to have spares on hand.
Does it actually save money and increasing efficiency or is it just about bragging rights?
Add any other benefits/risks that I can't think of.