Shotgun shell question - General Ammunition Discussion

Hello, I would like to get more info on these type of shot shells. I heard at the Ohio show that early shot-shells had fingers that held the wad in. Is this that type? Would l would like to know the circa of this shells and what it is called? I am wondering if this is a fake or an attempt to show an example of these early shells . The OAL is 2.87 inches, Its weight is 421.7 grams. Thank you, in advance! IMG_20190617_103818|690x920

cdn.shopify.com/s/files/1/0561/1365/9947/files/Ste

Hornady Critical Defense 12 Gauge 00 Buckshot Shotshell Ammo

Why do shotgun shells have lower pressure than rifle rounds? - Quora

Frequentely Asked Questions - Artillery Shrapnel and Shell Fragments

Shotgun shell question - General Ammunition Discussion - International Ammunition Association Web Forum

Advice – Blixt and Company

1 Gatling Gun Cartridge Question - General Ammunition Discussion - International Ammunition Association Web Forum

ReaperDefense Armor Piercing 12G - Guns N Gear

Lakeland Rifle and Pistol Club FAQ - Lakeland Rifle and Pistol Club