I’ve got both, or rather my lad and I have both between us.
Echo all that’s been said above. .17hmr has its uses, corvids etc, and shoots flat(ish) out to 150 yds. However, .22lr is in my humble opinion far more suited to bunnies. It’s much much cheaper to feed, in the right hands it’s accurate out to 85 yards, 100 at a stretch. Yes, you do get the occasional bouncer, but with the right mod it’s whisper quiet.
A session with the HMR showed me that it’s noisy, even with a decent moderator. Out of the thirty or so bunnies we shot, all were headshot but five of them had damaged shoulders due to the v-max rounds.
In he last few months .17 rounds have been increasingly hard to find. Quality control is out of the window with many reports of split cases and squibs. They are also badly wind affected. I wanted to like it, but it isn’t the wunderkind we were led to believe.
FAC air is a good shout.