0.025-0.030 inch. Thinner (tighter) than a credit card.
Thanks! I'll keep that in mind for the next order. Assuming this gap would apply whether it's base or adjunct malts (well, I would assume something like faked oats wouldn't apply)? They usually mix all the grains together unless you ask to bag separately.
A mill is still one of my best investments. My efficiency immediately jumped 8 points and became more consistent once I didn’t have to rely on the lhbs. I rarely go beyond a 45 min mash with normal styles.
To be honest, I've looked at various models on different sites and watched a few videos on the topic but haven't really dug into it deeply. Part of the issue is the price vs. quality, the other issue is buying grain in bulk.
How long is a 50# sack of 2-row good for? It would take me a good four months to go through one of those. I've read about grain getting old from sitting around but if you have in air-tight container in a dry, cool basement, how long is it good for?
I'll second that a grain mill was the single most useful investment I've made when it comes to brewing. The most important thing it did was give me consistent efficiency. When I was getting crushed grain from multiple online and LHBS my efficiency would swing by as much as 10% from batch to batch. After a couple of batches to dial in my crush my efficiencies are within a 2% range pretty consistently.
A sack of uncrushed grain will store well in a cool dry place for at least a couple of years (and I've gone a lot longer than that to be honest). But if you're concerned, just buy 5 or 10 pounds at a time.
Also, I sincerely doubt any homebrew shop will set their mill to a specific gap setting for you (especially one as tight as Dave recommends), but if you have a good LHBS that isn't super busy they might be able to run your grain through the mill a second time which will get you a bit of a finer crush.
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