Some time ago, one of our SD members was trying to discover a load that would make the .22Hornet Lawful for shooting small deer (Muntjac/CWD) in England and Wales (Roe in Scotland). To do so one would need 1,000 ft.lbs. muzzle energy with a 50 grain bullet.
That means just over 3,000 fps.
We didn't hear any more of it though.
Best I can get is 2,900fps with a 40 grain bullet and a full case of H. Li'll Gun so perhaps not possible I suspect ? Just curious.