Originally Posted by Parva
I don't think too large a mash volume would cause problems provided it was at the correct temperature and it was subtracted from the sparge volume. And yes, you're aiming to get as much out of the grains as possible but there's only so far you can go before you ruin it.
In my own experience I am doing AG's and I know I'm using more grain than I need to as I'm ending up with final runnings from the mash tun at 1.018 currently but I'd rather be inefficient and maybe cost me slightly more than be too efficient and cost me an entire brew.
That's a good point. I'm just starting to read about all-grain. Have two partial mash kits I'm going to do in the next two weeks and then have to wait for one of those to clear a secondary to get another batch going.
I hope to attempt an all grain that brew so I've got some time to read up on the subject and prepare.