Why don't shotgun slugs and shot use full metal jackets and why

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Why don't they make pointed shotgun slugs? - Quora

What is the point of having shotgun slugs as opposed to bullets

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Why are shotgun rounds just metal balls? - Quora

How dangerous or painful is the recoil of a shotgun? Which shotgun had the strongest recoil and what features of that shotgun make it this way? - Quora

How to Pick the Right Ammunition for the Application - Guns and Ammo

How can a shotgun shell with a powerful charge use a plastic case, but rifle shells have to be metal? - Quora

What were shotgun shells made of before plastic? - Quora

What is a slug gun? - Quora