I had a few stuck sparges in a row and decided to adjust my mill gap to get bigger husks to assist in my sparge/lauter. Currently my mill gap is set at .045" and it's awesome in regards to lautering, but I've noticed my last 3 batches have all been about .10-.12 points short on my calculated OG. I know the standard gap on my barley crusher is .39", but I'm wondering how some of you set your gaps and whether you condition your malt (if you crush tight) and whether that's impacted your efficiency besides just your lautering process? Thanks!
I use a JSP adjustable mill and I have the gap set as tight as it will go. I've never measured it becasue I just don't care what it measures. It did indeed have a positive impact on efficiency. I have never had a stuck runoff, do not use hulls or condition the grain before milling. I think it has as much to do with your lautering system as the crush.
I constructed a copper manifold and also noticed that my slits on the pipe were closing up, so I also adjusted that aspect of my setup. Now that I'm back to lautering well, I know it's my mill gap.
two changes i made in order that raised my efficiency: switched to batch sparge from fly sparge, and tightened gap on mill to .027. went from 60's-70's to mid to high 80's.
just play around with the crush, and find what your system will tolerate.
EDIT: forgot about my mash-i also mash in on average about 1.75-2.00 qts/lb
I currently batch sparge as well and likely average about 1.25qt/lb. I found a lot of good info on Braukaiser's page about mill gap size and conditioning. I'll start by adjusting one area and finding what happens.