A bunch of us used to often go out for an evenings plinking on some marshes where we had permission. It was an old landfill site bordering saltmarshes with some wide open tidal pools & creeks. Tin cans out on the mud or chucked in the water at anything up to a 100 yards or even further.
There was a lot of aiming off to account for wind & some crazy elevation required as the tins floated off into the distance, i have no idea of group sizes but it was good fun. Funny thing was i often used to shoot a 1910 BSA imp model D in .22, it had an aperture sight fitted with flip up tower that had a fast action thread to allow rapid elevation changes, It suited the really long range shots remarkably well. The sightline was such my cheek was right off the stock & it was easier to adopt a back position. Once had a shoot off with a mate who had a brand new RWS 54 sidelever. If the tide was out we would snipe crabs out on the mud, Happy days!