block/charge/no call considerations

[ballgame99]

Did a pre-season league game this weekend (small high school boys) and had a block/charge situation come up. A1 drive to the basket baseline, B1 comes in as a secondary defender and establishes his position basically under the basket (he was maybe a step out from under it). The timing of A1 leaving the floor and B1 establishing his position were very close. Ball is released before the collision and goes in.

I no call it; play on. The timing of the play was such that if the contact had occured somewhere other than directly under the basket I would have gone with a PC. I would be interested to hear others' thoughts on a play like this.