As far as I know, Adam, it's never been a violation to catch a
shot that fails to hit the rim in HS. But I'm not that much of a long-timer. I've only been reffing for 12 years. I didn't have a clue what the rules were when I was playing in HS back in the [18]80's.
Get MTD to pull down his old rulebooks. He'll probably know for sure. JR might be able to help if he remembered to take his Ginko Baloba this morning.