The 17hmr is a round that divides
opinion, for me its maximum range on rabbits is around the 160 yard mark. Reason for this is simple, the Vmax bullet is designed to expand from 1600 fps upwards( at 160 yards it's about done), it's accuracy is marginal (at that distance in ideal conditions 1 1/2 " at best )and if a butterfly flaps its wings in a neighbouring county it'll be blown of path.
Am I being contentious? Yes. I'm still interested in other people's thoughts on what they consider to be an appropriate max range for the hmr though.