wartyOne
That guy
eh?
my brew day goes like this...
after getting equipment and ingredients ready-
heat the mash water, pour mash water into mash tun, slowly stir in grains, assuming i hit my target temp, close lid, and let sit.
during the last 10 or so minutes of the mash, i start heating my sparge water
when the mash is done, vorlauft, then take my first runnings. then pour in the sparge water (i just batch sparge, works for me)...let sit for 10 or so minutes, vorlauft, take second runnings.
then boil
Vorlaufing is recirculation. But if the suction on the outlet of the mash tun is too hard, you'll compact the grain bed and you'll result in a stuck mash.
Basically, with your grain bills and mash temps, the only other variable is how hard you're pulling on the bottom of the grain bed. Try slowing down your recirc, because with all your current parameters, you shouldn't be regularly sticking the mash.