I do like these information posts from the NRA and I believe this one is different from an 'in praise of the 12 gauge' thing from them I posted a longish while ago. Since there are some nice photos at the source, I'm just posting the link.
https://www.americanrifleman.org/content/supreme-versatility-the-12-gauge-shotshell/?fbclid=IwAR3xlkuKRZ8DVK5C6ZiFEMzMGBY3KV62XQc6gm7pmaqzZu1Xqb9bnBZ_pBQ
https://www.americanrifleman.org/content/supreme-versatility-the-12-gauge-shotshell/?fbclid=IwAR3xlkuKRZ8DVK5C6ZiFEMzMGBY3KV62XQc6gm7pmaqzZu1Xqb9bnBZ_pBQ
