While brewing my ipa this past weekend, I noticed the spec tag was illegible. It was a sack of Rahr Pale Ale malt. I sent an email to Rahr and the next day I have that lots spec sheet. The funny thing is that it was a blend of 2 different years. 50% blend of Metcalfe and Harrington from 13 and 50% of the same from 14. So how fresh are grains when you buy them anyway? I'm getting ready to run some test batches, side by side, with fresh and 3 year old sacks. I want to see if there really is a big difference in extract and flavor. I would have no problem buying a sack, storing air tight, and using it over the course of the year. Especially if it is uncrushed base malt.