ORIGINAL: GMMAT
Fixed blades, only.....no problems.
Hell I shot through my BLIND[&:]
I love the brutal honesty Jeff.
Shoot through mesh has zero (noticeable) effect on fixed blade heads out to at least 50 yards. I can't say beyond that but I did shoot a deer at 48 yards through the mesh.
As for mech heads, I'm not going to be the guy to tell to that it will work... but I've done it with a few different heads and it's worked for me to kill turkeys, pigs, armadillos... etc.
These heads include but are not limited to

:
Eastman ST-3 (which is a COC head)
Eastman Silvertip (or silverstrike)
and the Crimson Talon Cuda
Obviously all these heads have rubber bands that hold the blades in place and they aren't overly sensitive. All you can do is try it.