Spare set #480 gives you ten leaves, one ball each: 6-9-10, 4-5, 2-4, 3-10, 5-6, 4, 3-6-10, 2-4-5, 3-6 and 5-8.
We rolled each of these leaves 48 times with the Hard computer's aim and errors. On this set it cleared 19.9 out of 48 on average. The kindest leave here is the 3-6 leave, cleared 31 times out of 48; the toughest is the 5-6 leave, with only 7.
The set includes a corner pin (6-9-10 leave, 3-10 leave and 3-6-10 leave). Shoot it from the other side of the lane so the ball crosses towards it at an angle. The widest leave, the 6-9-10 leave, has pins far apart across the lane; it needs a pin to slide across and take the other. Clusters of three or four pins (6-9-10 leave, 3-6-10 leave and 2-4-5 leave) fall to a ball aimed at the pin closest to you.
A hard set with awkward leaves. Clearing six or seven of the ten is a very good result here.