Hi Ash, wait for the 17 super mag, 25 g at 2650 fps or 20 g at just over 3000 fps. The bullets will be far cheaper than 17 hornet.
But to be honest you won't go wrong with 223, it's a big ask to kill a fox over 220 yards with most small rounds and they are so wind effected. 223 or 222 are far...