Berdan primed M1 30 Cal. Carbine brass ?

[swampersand]

After a bad afternoon of decapping a bunch of mixed carbine brass I realized that a number cases were Berdan primed and therefore taxing my Lee Universal Decapper. I had no idea that carbine brass was ever manufactured with Berdan primers.

As I recall, the headstamp indicated that Lake City was the source and that makes it even more curious. Does anyone have more info on this apparent anomaly?

Thanks