I've had problems with the ammo comming out of the czech republic, so I stay away form them. I will relate the issues here: I had a case of Sellier and Bellot in .223 that I used for my three ars. I noticed after firing it in my prarie dog gun the case was split all the way down the middle. So I switched to my carbine, the same, and then we switched to my old man's mini-14, the same. So we know its the ammo not the gun. Then my friend sighied his 30-06 with winchester ammo and the the case was split right down the middle just like my .223. when I looked on the box guess where the ammo was made? The Czech republic, that was about 6 years ago, I don't know if they fixed the problem, but I am not willing to mess my guns up finding out. I will stick with remington, federal, or my handloads.