before I start I write this not as an invitation for the armchair HSE inspectors to chip in their 2p but as a real world report on what happened/can happen when shots pass through material between muzzle and target quarry.
I was foxing last night, golf course, mainly very open ground, undulating grass with a few copses. I know the area well and was in my usual spot of choice.
Big dog fox coming in from the right crossing a fairway over to a small copse. I faffed a bit trying to get a bead on him in the open and he was not stopping.
I squeaked one more time just as he entered the margin of the copse (which is very open and you can see right through to the other side)
He parked himself broadside quartering away at about 50yds.
a squeeze, a pop and a thump and he went down like the proverbial sack.
when I finally went over to retrieve him I noticed that between him and the firing point there was a small section of rusted brown, coarse chicken wire fence standing up. Holes in the mesh approx 1.5-2cm square. totally invisible through the scope.
The fence was approx 5-7yds away from the fox (closer to the firing point obviously)
I stood behind him and looked back and there is no way the bullet missed the mesh, it had to have passed through.
Only since the grass has died back is it now visible
It may have passed perfectly through a hole but unlikely
I found no obvious damage to the fence but it could have clipped the wire in numerous places it was so old and dinged.
Fox has a very small, single entry hole, no exit, POI exactly where I was aiming just behind the shoulder.
bullet was 50gr .224 Vmax clocking around 3100fps
Now the Wikipedia school of ballistics will tell you that a blade of grass will deflect your bullet and shatter a ballistic tip as soon as it touches anything.
This one was not deflected, appeared to shown no "keyholing" or premature deformation at all.
[Disclaimer: this is not a recommendation to shoot through stuff! nor is it an invitation to educate me on checking flight line or lamping technique!]