Seriously... what's the deal with ammo prices?!?

So why is it that the price for all rifle and pistol ammunition has skyrocketed, yet shotgun ammo prices have stayed almost the same? People claim that prices have risen due to the cost of the essential commodities, like br, lead and copper. But look at shot shells. A 12 ga shell holds a similar amount of br as a .223 casing, it has 3-4 times the amount of powder, and it has 9 times the amount of lead. Sure, shot shells have no copper, but the amount of copper in a .223 jacket is less than the amount found in a penny. But somehow a single .223 round is 40-50 cents while a single shot shell is 20-25 cents. When I started shooting 3 years ago, 9mm was 5 or so a box, it’s now 12 a box. .45 ACP was 8 a box, it’s now 20 a box. 12 ga field loads were 4 a box, they’re now 5. What’s up with that? Are we all just getting ripped off?