Olympic Ammo is made in Greece and from my experience with the 9mm ammo they make it is suitable for range time, especially when one ius practicing clearance drills. I am told that the 9mm ammo has hard primers probably suitable for sub-machine guns. My glock was able to fire most of them with but there where numerous primer strikes that failed to detonate the primer. I had never had this problem with my Glock with the numerous domestic and +P rounds that I had fired, nor have I run into any problems since.
Now I did not purchase any .223 ammo from Olypic, maybe I got a bad batch I would not trust my life to this ammo, plinking would be about it.
Kyle