From the color of the packaging, I think your ammo is probably from the 1970's or 1980s.
There is no telling the conditions (heat) it was stored in. (Though, 'Clean and Shiny' is a good sign).
Are these Factory loads or Reloads?
If they were mine, I would 'pull' a couple bullets - (a Quiet catridge and a Noisy cartrige) - and check the condition of the powder (smell, color, & how it burns).