Powder lasts, cans do not

[skeet]

I've seen that before. I also had a can of 4831 that had rust in it. Gave it to a friend who went ahead and tried it in of all things a 243. Said he just blew as much out as possible by blowing on it. When he ran a few over the chrono the speeds were in right area and his accuracy was as he said a little better than normal. I was just given an 8 lb 4350 and a couple pounds of 4320 all unopened. The 4350 is dated 1978 I think. Hope its ok cause I just got a nice 25-06 and a beautiful 722 in 257 Roberts. Good powder for both. I also have a couple pounds of WWII surplus 4831 I got from Hodgdon in 1965.. It's still good and I also have some HiVel #2 from a can dated 1939..shoots just fine