Grains were crushed as time of purchase, I really didn't look to hard when I got them, but now that I think about it, it didn't seem very crushed when I added.

Good afternoon, General question, recent all grain brew I did, the grains used were roughly 6-9 months since purchased, Does this effect the efficiency of the brew? Missed my target O.G.of 1.065 by a considerable amount 1.037 @70F. System used: Brewzilla Mash was held for 1Hr Fly sparge was...