Nice shooting Wolfdog. I think your rifle is likely a 1 in 12 twist.
This is a faq list from graybeard’s.
22 Hornet 1 n 12" (original H&R pre '87 1:16"?)(or 1:9" for late production)
I am not sure which years are “late production”.
For the link to this page which answers this and other Handi questions, go here -
https://www.gboreloaded.com/forums/index.php?topic=26264.0