OT 22 Rimfire Construction?

[Driftwood Johnson]

Howdy Pards

I'm looking for information here. I'm pretty sure I remember reading somewhere that modern 22 rimfire cases start out as two pieces, with the rim being brazed onto the tubular case body. Anybody else ever heard this or did I make it up when I was sleeping?

I've been snooping the web for something authoritative, but so far I haven't found anything about exactly how ammo is manufactured. Just general stuff.

Anybody heard this before, or have any books or websites to point me to?

Thanks

[St. George]

It was my impression that modern cases are extrusions, as were the originals.

That's be the fastest way to produce them, where brazing'd add cost.

Vaya,

Scouts Out!

[Delmonico]

They are extruded, brazing on a piece that thin can be done but the cost would end up being most likey the price of a box of ammo for one.  Extruding is the reason many early cases were of copper, it is easier to work with.  You many be thinking of the coiled cases as in the British 577/450 which I believe in the coiled cases was soldered to the rim.

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[Driftwood Johnson]

Howdy

Thanks for the anwers. I believe the term you fellows are referring to is Deep Drawn, not Extrusion. But I appreciate the answers. Seems I was misinformed.