Berdan Rifle Primers

On a whim, I googled "Berdan primers" and the top hit was a place actually selling them.  I'd read that RWS Berdan primers used to be available in the U.S., but sources dried up.  These are TulAmmo non-corrosive primers for 7.62 NATO.

One concern I have is that the dimensions (incorrect on the DAG Ammo KV762N page) don't match the information I found previously on Berdan primers.  Still, it might be worth experimenting with, considering the amount of 7.62 NATO ammo with nice brass cases and Berdan primers.  All of a sudden, the 33% cost advantage looks more attractive!