I have some Hero Shark Daggernose and I'd be surprised if a shotgun could put buckshot through the mesh from a few meters away. With a small bend they fit my face very well. That said, they are not the best mesh to see through. Better than the sort with small hole perforated sheet, which darken the view like shades. Not as good as interwoven wire for seeing through.
It's to do with the largest dimension of the barrier in front of your eyes. With wire it's the diagonal where 2 cross, but with perforated sheet mesh it's the triangular shape between the offset circular holes, which can be a third to half again as large as the wire diagonal. Basically, the larger this dimension, the more you get a layer of shadows across your vision when looking through it. This affects how well you can resolve colour and also spot tiny movements, unless you are perfectly still. It also causes your eyes to involuntarily refocus close up, on the mesh, which then takes a while to get back to the long focus where the mesh seems just like shadows.
Unfortunately the best mesh for seeing through that is also safe, .7mm #8 mesh, is only safe to save your eyes from one full auto burst. It will deform while being hit and, although there is effectively no chance that any burst which could hit you during a skirmish could penetrate, after that, once the wires are deformed, is another question entirely. I do trust them after single hits and even a few from a burst, but mine have never been hit by a good burst all in one place: after that I will retire them.
This is the type I'm talking about, but I have also customised my ESS Advancer V12's with the same mesh:
They work really well, but I'm sure I can do better. At some point I intend to try hardening the formed wire by oil quenching.