Happened to me with Vit 133 in .222 and .223 cases. Also had a 2# bottle go bad, it had been opened, used and put away, when opened several years later, brown cloud came out. Opened another that had been opened several years prior it seemed ok, loaded some .222 and got squibs and alot of un-burned powder. Emailed them, guy calls me the next day we discussed it in length on the phone, short of it he/they had never heard of the powder corroding cases or going bad, insinuated improper storage. All my powder and primers are stored in the heated and cooled gun room, powder in over head cabinet and primers in a file cabinet on the other end of the room.
I have several other open Vit powders that are 10-12 years old that are just fine.
Have not had a problem with any other powders and most of my powders are 5-30 years old.
jme
arky
Last edited by arky65; 11/17/19.
