The only time I was jealous of my wife’s previous boyfriend was that he took her to the theatrical release of The Wind and The Lion.

Since APP, unlike nitro powders (ug) is made using stable materials that do not degrade then as long as it is kept dry it should last as long as standard
Gunpowder. Carefully break up the lumps and bang away.
Some I have that is eight or so years old loads and shoots just fine and cleans up a lot easier.
Hold Center
Bunk

 I posted in one of Mako's threads on BP shotshells about some old commercial shotshells made with Pinnacle (APP) in paper hulls.  I bought them from a retiring shooter, and they must have been 15 years old.  Anyway, the boomed just fine but the paper had degraded so it split badly and the heads tore from the hull upon extraction.  So I think it would be okay in properly loaded metallic cartridges.  Major, I did the same as you with some of this stuff - I dissected 4 rounds so I could reload a few of the paper hulls with BP (they disintegrated just like with the Pinnacle, so the paper was already degraded) - and the powder in those shells was like a rock which I chipped out with an ice pick.  Anyways, I took those 4 shells worth of powder and chunks and set it off inside a sheet of newspaper on the back porch.  It whooshed and smoked just fine!   

The one container of Shockey's gold that I have used was clumped when I first opened it, making it difficult to measure out with a dipper. I closed it up again and shook the heck out of it. Problem cured.

Yeah, that's the ticket

On a burn rate chart, fastest to slowest, it is#71 out of 142. 23 gr. will probably about
fill the case.


                              BTB