Target archery scores each arrow by the ring it lands in, from 10 in the centre down to 1, and a round is a fixed number of arrows — so a round has a maximum score, and every archer shoots the same one. Indoor rounds at 18 metres and the 300-point rounds common in winter leagues are both scored this way.
Ties on score are usually broken by counting 10s, then inner 10s (Xs) or 9s, depending on the round. It rewards the archer who grouped tighter, which is why most clubs use it for their leagues too.
Season standings rank on total score or on average per round. Total rewards turning up every week; average is fairer when archers miss weeks, which is why many leagues require a minimum number of rounds to qualify on average.