With the Hornet, Lilgun powder has become the 'Gold Standard' by which other powders are judged.
I use a Lee Collet Die to neck size, Lilgun powder, usually 13.0grs, a small pistol primer and a 45gr bullet, usually a Barnes XLC.
Do try small rifle primers as well, but most of my loads use a spp.
My rifle is a Ruger M77 sporter.