Bozarth & Spurrier Ammo Service???

[pacowboy]

I have a small box with what looks like copper cups in it. They are approx. 1/2" long by about 3/8" diameter. The box has Bozarth and Spurrier Ammo Service stamped on it.

Does anyone have a clue what they might be and what they are for?

Thanks,
Tom

 

[CatShooter]

They are jackets for making pistol bullets.

.

 

[jb1000br]

or gas-checks...