Shooting through mesh with two field points and one muzzy practice head;

http://smg.photobucket.com/albums/v79/CVBears2006/?action=view&current=Mesh.flv

The results (I punched the trigger on the second shot, no worries);

http://smg.photobucket.com/albums/v79/CVBears2006/?action=view&current=MeshResults.flv

Don't know so much about mechanicals through it, but I would imagine the results would be very similar. The mesh is very pliable, I can push my finger through it with little effort. I can't imagine it messing with your shot too much.