The smallest I have consistently used is a .22 hornet. It's OK and it will do the job but your range is limited to about 150 yards. I would think the .22 mag would be similar. The hornet puts a 50 cent piece sized hole in them.

CZ makes a great gun.
I own a couple,one being the semi 22 mag.
Another reliable 22 mag I own is the ruger 96

Been thinking pretty seriously about the CZ .22 mag, primarily for coon. Always wanted a .22 mag but never had one.

Moosetrot

I used to use one then switched to .223
Much better.

As with a any caliber shot placement is crucial. But all in all a 22mag is a great round if you stick with 40gr hp. Heart shot they will run a bit. I still call allot with my 22 but only head or neck shots are taken. In thicker places there is no need for a center fire. Shotgun or rimfire for me. In open country the 223 comes out though

Just got my FFG when I got home. Darn good article about squirrel hunting and the .22 mag.

.223 with 55-50 grain nosler

Moosey, I have a CZ 452 American in 22 mag and it is a fine weapon. I had a little work done on the trigger and that really made a difference. Very accurate, my favorite rimfire. I have a Burris Fullfield II 3x 9 on it.
Zim

Semi-auto .22 mag is the ideal coon calling gun IMO. You need good knock down power the mag provides and the semi-auto for quick follow up shots or multiple fast moving targets.

.22 mag is not and has never been a coyote gun. It'll kill them but you'll wound more than you kill unless you just don't shoot at them beyond 50 yards standing still.

Heck. I use my 22 long rifle for calling coyotes regularly. But I hunt different, and under 50 yards is the expectation. For me, 22 mag is lots of gun. If you are not used to close range hunting, I suppose it is anemic?

I don't take far shots either (sub 50 90% of the time) but don't hunt/call yotes.

Elaborate more about having them come in close.

When calling coyotes it is time for the Tikka T3 Lite in .223. Absolute tack driver. Might be looking at the CZ's when gun show season rolls around. I really want to try coon calling this year.

Moosetrot

If they don’t come to within 50 yards, I don’t shoot. I try to set up so they HAVE to come in close obviously. I do have a .222 and a .22-250, but my hunting style and desires are such that I crave up close hunting, knowing I outwitted an animal, not simply kill it because it came within 300 yards. Just the way I have become. Then I take it one step further, and use a lakefield single shot. The one I got for Christmas when I was 8. I dunno, I enjoy it.

this^^^, so I'm a .218 Bee or .22 Hornet guy.

I use a 22 mag because in my county in PA it is shotgun or rim-fire rifle only -- other counties allow center fire and then it is my 22-250. Prefer the 22 mag to reach-out to 70+ yards in the rim-fire only county. I have never lost one with the 22 mag. I shoot the Hornady 33gr. V-Max in the long gun and CCI 40 gr. in my revolver.