I bought a Ruger 17/222 for a good price intending to have it re-barrelled to something else.
Of course, before I sent it out I wanted to see what it would do as-is.
After a loooooong cleaning session I loaded a few rounds using max 17 Mach IV loads. It shoots so well that I'm leaving it as is.
I've been sort of winging it on the loads, but I think you'll find it's worth the effort.
Lefty