Here in Georgia, it's legal, ditto Alabama.
Legal, Functional, and Desirable are three differnent things.
I've killed over 50 deer with the .22Hornet. It works......
Penetration is better than most would imagine. Velocity is low enough that it does penetrate well.
The wound cavity is fairly narrow. Best comparison I can make is that the .22Hornet from a rifle is very similar to a .357mag from a handgun.
The vast majority of my shots are head/ neck shots. A few, on smaller deer have been body chest shots. For about 5yrs, I carried my Ruger M77/22Hornet in my patrol-4x4truck to dispatch auto-accident crippled deer. Once had to dispatch one that had jumped/fallen into an empty water treatment tank (15' deep, 100' in diameter concrete tank- think olympic sized swimming pool with pipes, stanchions, ect. I used a cast bullet (Lyman #225415- 49.5gr Pointed-flatnose w/gascheck) over 6.2gr of #2400 for 2,000fps. Think a reloadabe .22wrm........
In my neck of the woods (70mi S.W. of Metro Atlanta, GA; metropolis of 5+million people), the .22Hornet was the POACHERS gun of choice. Mild muzzle blast, (but a blast, nevertheless) and no recoil, and guns are typically small and light, inexpensive-ie: the N.E.Arms Handi-Rifle aka H&R "Topper". I apphrended a number of individuals who had taken deer at night, or were hunting deer at night using the .22Hornet. In the densely settled rural area's, it also was popular for "out of season" hunting because it was by law, legal for hunting/taking small game animals, too. (except on State WMA's).
Mild report, relatively flat trajectory, inexpensive guns, fairly accurate, 50rds of ammo for same cost as .357mag handgun, ect...... Not a bad resume.
I still have a Ruger M77/22 in the heavy barrel, gray stainless/laminated stock version. I've taken a lot of deer with it on depredation permits. If the deer don't know where you are (can't see you) you can take down half the herd before they can figure out where you are to run away. Until then, they will frequently run towards you because the echo's of the report confuses them. My favorite tool for that job.....
My favorite load is the 40gr Sierra "Varminter" Hollow point. Over 12.5gr of Hod. Lil'Gun it get's ~3,000fps and is about 1moa accurate (5-shots at 100yds). One of a few loads that will do this from my rifle. Penetration on deer runs to 18". Hence, I've never recovered one from heart/lung shots. My longest shot on a deer was 187yds, a ~90lb yearling doe. Double lung shot dropped it, deer ran ~40yds before expiring.... Typical of any lung shot deer.....
I am however, a patient shot, and don't get overly excited at shooting "another" deer.
Work, work, work..... the fun is over when the shot quits echoing....
For typical sport hunting however, like another said.... Grow up and get you a .243 or .30/30 if you are recoil/noise sensative. Much preferable for shooting deer, especially at over 100yds.