Hi there, im looking for some advice!
I was out on the bike yesterday when I hit a rock which knocked the rear mech into the wheel! I removed it from the spokes and everything looked ok. But then it wouldn’t go into the large ring at the back, only throwing the chain over the cassette.
It just seems this is move than a fine tune job!
any ideas?
cheers

adjust the low limit screw so the mech can’t chuck the chain that far over ?

If it was okay before but doing that now I’d imagine you’ve bend the rear mech hanger. These can normally be replaced or carefully bent back depending on the bike.