What if it is marked with CZ 858? Does that mean it is not made in the same factory or how does that work?
Lastly - chrome vs non-chrome?
The 858 is more accurate than the chrome bore 58's but wear out faster if you shoot them hot.I consistently put 3rds. into 1/2 " and 5rds. into 1 " at a hundred with an 858. The non chrome bores are tighter.
Oh snaps! Nice group!
Mind if I ask what setup you're using to achieve it?
I've got a 58L (non-restricted, chrome lined barrel) and an 858 (non-restricted, no chrome) and really don't notice much difference between the two... aside from the fact that the barrel on the 58L is actually a bit LONGER then even the 858!!