I was thinking instead of, say, a race to 10, which is min 10, max 19 racks, players could also play a race to 3 sets.
Race to 3 sets, each set Bo5 racks:
Each set is best of 5 racks. So that is min 9 racks and max 25 racks.
Or shoot out at 2-2. That's min 9 racks, max 20 + shoot out.