That was what I found. I have a lot of the lake city 223. I also have old military 30-06 that I had to punch out primers with a punch ( crimped in) and then ream the primer pockets before reloading. Certain old military cases have two small flame holes instead of one. I throw them away. Seem to me they were old 6.5x55.
FYI
two, three, or four flash holes means Berdan primers
can be removed by filling the case with water or mineral oil and syringe plunger that is slightly larger than the neck.
Berdan primers are available from RWS (if you can find a dealer)
Those are Berdan primers. The standard brass that can be reloaded with the single hole are Boxer Primed.
Many years ago as a teenager I did some reloading of Berdan primed cartridges. It is now really hard to find anybody who manufactures and sells them for the reloading crowd.
“Certain old military cases have two small flame holes instead of one.“
Berdan priming. Boxer priming has a single hole. There are special punches made for Berdan. But it’s mostly not worth the trouble. Back in the day I picked up a couple thousand surplus Lake City 5.56 rounds for 12 cents a round. All I wanted was the brass. I hate that stupid green tip bullet.
The primer pockets are indeed very well crimped. But the quality of the brass makes it worth the extra step to clean that up. At least to me it is. So I fired the surplus stuff and reloaded it with a decent soft point bullet.
Best,
L