Indentations on 9mm case - Ammunition & Reloading - New Jersey Gun

Ive started cleaning brass and have come across a number of cases with these indentations on them. They go all the way around, the depths of the indentations vary as they go around. They also vary from case to case. So far about 4-5 out of the dozen or so Ive pulled out of the tumbler have them.

Byrna SD Basic Box

Sale 1019 Arms & Armor by Hindman - Issuu

GUNS Magazine The Taurus G3 T.O.R.O. - GUNS Magazine

Knurled cannelure on german 9 mm Parabellum - General Ammunition Discussion - International Ammunition Association Web Forum

9mm Ammo at : Cheap 9mm Luger Ammo Here

MINT J&R Engineering M-68 9mm Carbine 16 barrel RARE Early model - Semi Auto Rifles at : 1021639344

Dented ammo… safe or not? : r/CCW

What does the gun range do with all the used bullets and casings? - Quora

458 SOCOM With 265 Gr. Flat Base Raptor From Cutting Edge Bullets Expanded Ammunition Ammo Cartridge Pew Model Desk Accessory

Indentations on 9mm case - Ammunition & Reloading - New Jersey Gun Forums

Reloading firearm cartridges: Part 2

The Illustrated Encyclopedia of Handguns, PDF, Handgun

Morphy Auctions Auction Catalog - Field & Range Firearms - Day 4 Online Auctions