Why are shotgun shells made out of plastic while rifle shells are

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Why are high-caliber rifle cartridge cases shaped like a bottle? - Quora

Why don't shotgun plastic shells melt? After all, there is an explosion inside it - Quora

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Why are shotgun shells made out of plastic while rifle shells are made of metal? - Quora

Why are shotgun rifled slugs have little weight compared to buckshot? - Quora

What were shotgun cartridges made of before plastic existed? - Quora

Why are shotgun rounds just metal balls? - Quora

How do low brass and high brass shotgun shells differ? - Quora

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