Originally Posted by TopherM
That's a prime reason to do a mashout. If you mash in a kettle, heat it up to 170F for 10 minutes to stop conversion and lock in your body profile. If you mash in a cooler, you can sparge with 170F water to get the same effect.
In theory, that's the case. But if the FG is where it should be, then I wouldn't worry too much.
For me, I do mash out when I fly sparge, but I still have my runnings on to heat while draining the MLT. For when I batch sparge, I don't mash out but I use a hotter infusion to get the grainbed to 168 and then also start the first runnings on to boil right away.
So, I guess the answer is "it depends".
If you're not starting the first runnings onto boil as the MLT is draining, and it will be held at a while before that, then a mash out is a good idea.