I don't have a Handi in Hornet. I have a couple of Rugers. They are about the same length 36 VG .696 /40 V-MAX .683. The 36s worked well for me in 223. I think they will expand/explode at about any velocity. They should fit well in the Handi chambers as most seem to be long.
What twist is your Handi barrel?
I bought some of the new 30 gr Varmint Grenades and loaded them light in 223 and had impressive results. They should work great in the Hornet. They are short and will load nice in the rotary mag of the Rugers. I'll have to find the velocity but they were accurate and seemed to perform great.
I emailed Barnes about the 30s and was told I could use them in 22-250s. Haven't got to that yet but would think I may get 5000 fps
and just dust about ten ft. from the muzzle