90 gr's of Blackhorn 209 should be pleanty, you could even go less. In My Wifes ACCURA I have her set up with 70gr's of Pyro and a 240gr XTP mag and Win 209 Primers, it's a smooth shooting combo and should be plenty enough to take down a Deer at distances up to 100yds. My Wife just had Carpel Tunnel Surgery so she's not Hunting This Season and has'nt had a chance to try Her New ACCURA with this load combo, but with any luck she may get out for our Late Season ML Hunt and I'll let everyone know how this load works for her.
Success to you and your Daughter and let us know how she makes out.
(BP)