These pellets are nickel plated (rather than copper), and that should make them penetrate a tad better (than copper-plated lead). They will not penetrate (same size pellets) anything like as well as HTL or TSS pellets.
A few years ago, I experimented with them, but couldn't get them to pattern as well as some other brands.
As many may have noted, higher velocity loads tend to have more erratic patterns than lower-velocity loads. Many of the Fiocchi loads tend to be a little higher velocity than some others. Many people swear by Fiochi's high-velocity loads for pheasant hunting.