I was googling Hornady TAP and found this video test of the 75 grain TAPFPD .223 through a 1/9" 24" Bushmaster Varmit rifle. Showing that the round can be quite accurate in a 1/9 twist barrel. Nice round!
http://www.youtube.com/watch?v=g95JPyZpfDQ
It would have been nice for him to group on paper instead of steel. The groups still were not that impressive.
Work up your own loads, you can probably do better.