Thats blued version.
In my Cz457 I only use Sellier Bellot Club ammo, in my opinion best ammo for that barell. I try many brands of ammo: Geco, Remington, RWS, CCI, Federal, Eley and Aguila. For competition I use SB Club, for fun Remington in bucket.
I bought this revolver for competition and fun, I was convinced by the price and solid construction.