Now that has me thinking. 22 Hornet - readily available and cheap to run so good for lots of practice on running boar /rabbits etc.
But 5.6x50r is legal for use on Roe in Scotland and muntjac south of the Border. But have to import cases and reload myself - not that big an issue. I was concerned that pressures might be a bit high. But it’s been done here on an identical rifle by the looks of it.