Ive been loading up .223 and 5.56 with some wc846 that I got from pats. Occasionally there seems to be a very slight hang fire. I went through about 90 rounds the other day and had 3 failure to fires. When I pulled them out, this is what I found. I am using cci small rifle standard primers. They are in pretty old boxes so I would assume they are at least 10 years old. What could be some possible causes for the powder to clump like this? The larger picture is all of the powder from the 3 FTF cases. I appologize for the size. Any help would be greatly appreciated.