Hornady .25 ACP - Berdan primed?

[Outlaw75]

I've got a .25 ACP M1908 Colt Vest Pocket that I gave to my wife as a wedding present. I picked up a couple of boxes of Hornady .25 ACP at Cabela's the other day and I just noticed that the box says it's Berdan primed. Can anyone tell me why Berdan and not Boxer?

 

[g.willikers]

Sourced out of the country?
Not a popular caliber for reloaders?

 

[Gary L. Griffiths]

Likely of European manufacture. I just got 1K rounds of Carl Gustav 5.56mm, and found to my disappointment they are also Berdan primed.