This isn't technically errata, but here's a Charge Damage Chart, as per Size for future editions of AS.
Size 1 Charge Distance Damage
4'" - 11" 1
12"-19" 2
20"-28" 3
Size 2 Charge Distance Damage
2"-5" 1
6"-9" 2
10"-13" 3
14"-17" 4
18"-21" 5
22"-25" 6
Size 3 Charge Distance Damage
2"-3" 1
4"-6" 2
7"-9" 3
10"-11" 4
12"-14" 5
Size 4 Charge Distance Damage
1"-2" 1
3"-4" 2
5"-6" 3
7"-8" 4
9"-10" 5
