I have a couple of containers of BH0209 about a year or more old. Does this stuff break down like 777 and pyrodex.

thanks,
LC

No

I have some that is about 7 or 8 years old(guessing) and it still went bang and shot POA 2 weeks ago.

Lefty read my thread about Blackhorn 209 problems. At the end of thread I determined that an new but broken seal on a container of 209 takes on moisture. This has created problems for me.

vacuum seal the can during the off season.works for me.