Grain mill gap

just got a mill. Will do all grain along with BIAB at time.
What gap should I set my mill to for All Grain and what to set it for BIAB

I don’t BIAB but I believe since you are not sparging and a stuck sparge isn’t a possibility you should be milling extremely fine, like credit card sized gap.

Lots of opinions on this. Which mill?

Oops, missed BIAB. I would go as fine as I could

I have mine set at .025

Is there a reason BIAB folks are paying for expensive roller mills instead of cheap corona mills? Seems like if all you need is a super fine crush, a corona mill would do just fine.

If it were me the reason would be to avoid shoulder surgery

For my BAIB brewing setup (with mash recirculation) I just run the grain through the mill twice rather than using a smaller roller gap.  I did notice a repeatable bump in efficiency this way without turning some of the grains into flour.  I think I get good wort clarity and don’t worry so much about the last few percent of efficiency.

I will do my gas burner 10 gallon pots, all grain most of the time and a 8 gallon recirculating electric BIAB pot when I don’t want to go out in 7 Degree weather to brew. I have looked online and found everything from .065 to .020 from people but now trying figure out the gap setting. In the past I have milled my grains a the LHB shop.
The mill is from my LHB shop, this is the mill…Products > Evill Twin Roller Mill | The Vintage Shop | Wine & Beer Making Supplies

I guess what I have learned is there isn’t a real good gap setting. I was told to just try a little and see if it looks good then brew with it and if it needs adjusting to get a better conversion then that is when you adjust it.
Seems everyone has different gaps depending on the mill and how they brew. Gonna play with it.