The one I have for my 17's is a Gunslick one piece carbon fiber rod.
They're pretty skinny little rods for those little bores and a bore guide, when cleaning my HMR, is almost a must or the rod bows something fierce. Doesn't seem to be as much of an issue with my 17 WSM and I don't recall it being a problem with my 17 Hornet but my 17 HMR is a real beeotch to get a patch down, especially, on the first pass.