New challenge!!!! shell casing type???

Ok folks, I have a challenge for you. What is this shell casing? A Friend of mine gave them to me. He got them (about 150) from his grandfather

RDS Switch Lite Deluxe Travel Case – Mario Grey Deboss Design, Nintendo Hard Shell Protection Cover Organizer with Game Card Holder Slots, Micro SD Card Holder Slot

A New Method of DNA Testing Could Solve More Shootings

Applicable model: For Nintendo N64. 1 x Top Shell. 1 x Bottom Shell. Color: Random. 12 x Other Button Accessories (As Shown).

New Full Housing Case Shell Cover Replacement Kit for Nintendo N64 Game Console

For Nintendo New 3DS LL Protective Shell Game Console Case Full

Orzly Carry Case Compatible with Nintendo Switch and New Switch

Redmi k40 mobile phone case liquid silicone redmik40pro protective case all-inclusive anti-fall Xiaomi k40 game enhanced version soft shell Chinese style men and women new 5g creative por national trend shell

New Style Multifunction Case Hard Shell Travel Carrying Protective Storage Bag for Nintendo Switch Red/Blue/Gray/Black

Bullet Bound, Typical Games Wiki

Tired of your boring old standard color?This is the way to go!Great customization option for DIY enthusiasts with a handheld console for Nintendo DS

eXtremeRate Replacement Full Housing Shell & Buttons with Screen Lens for Nintendo DS Lite NDSL - Monster Index Console Style

Federal 410 Bore Ammunition Game-Shok H41375 3 #7.5 Shot 11/16oz 1135fps Case of 250 Rounds

Shell Casing Art - Canada

New technique excels at lifting fingerprints from shell casings

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Make a Whistle From Spent Shell Casings : 5 Steps (with Pictures) - Instructables

50 Caliber WWII shell casing found on the beach in NC. Made 1943