Vox Humana wrote:
> I can see how the contents of the can might
> not cook evenly if isn't fully covered, but that is the opposite of having
> the can explode.
>

Making sure the can is fully submerged doesn't do anything except give you
more water in the pot so it takes longer to boil dry while you're not
watching it.

It's a harmless but needless precaution. Just like sterilizing your jars
before you fill them when you're gonna pressure-can them anyway.

I think pressure cooking several unopened cans at once for an hour at 15
pounds makes sense; the extra cans can be stored on the shelf ready-to-use.

Best regards,
Bob