I have been reading a bit lately and seems like a few people double grind their grain trying to get a higher effeciency. I am fortunate enough to have a great beerstore nearby and always grind my grain with their very nice mill.
So, even though I have never had an effeciaency problem on partial 10 gal recipes or on all grain 5 gal batches I decided to grind my grain twice.
I use a 10 gal igloo cooler with a bottom stainless filter. The grain was so fine that when I batch sparged I would get about 2 to 3 gallons before the filter would clog because the grain packed too tight and I would have to stir and start my whole batch sparging process over. It sucked! Especially for 10 gal of wort.
I won't be double grinding again.
So, even though I have never had an effeciaency problem on partial 10 gal recipes or on all grain 5 gal batches I decided to grind my grain twice.
I use a 10 gal igloo cooler with a bottom stainless filter. The grain was so fine that when I batch sparged I would get about 2 to 3 gallons before the filter would clog because the grain packed too tight and I would have to stir and start my whole batch sparging process over. It sucked! Especially for 10 gal of wort.
I won't be double grinding again.