I used to load 55gr FMJ-BT Hornadys under a charge of AA1680 if I remember correctly. I would have to consult my records. They appeared to stabilize just fine and accuracy was none too shabby either. Just moved into a new house, so the load books are packed away (somewhere).
1680 is a fine powder to load 22 Hornet and you couldn't go wrong with it in any grain bullet you chose.