I know this is a year overdue, but I thought I would try to help out if it is not too late, or learn something if it is...
I have been pretty tight with my .22 mags. I have owned two of them - One was a VERY pretty stainless barreled Laminated stock that I bought with the wife's recommendation (who am I to argue???). The other one I bought a couple weeks later when I found a similar gun (same mfr) with a stainless bull barrel, black Composite stock, and clip magazine for under $200 - yeah those days are sure gone! When my eyes were younger, I could do 10 shots - 1 hole at 100 yards all day long.
By my estimate that is a deadly rifle beyond 100 yards on almost any game. I can't attest to coyotes (that is what the .223's are for), but it is devastating on squirrel and rabbits out to 100 routinely. Judging by damage, I have to believe that it would be deadly on a much bigger animal with proper shot placement, and I do routinely carry it as a back-up gun when I travel with that intention.
I have shot exclusively CCI's through it because of that accuracy (why mess with success?), and both guns like it equally. I just came across some Fiocci rounds w/hollow points at 1.25 cents a piece, so I bought two bricks. I sure hope they shoot well. If not, I will probably have a bunch of cans with holes in them laying about!
If you have hunted dogs with it and you had any success I would love to hear how it worked and what your thoughts were on lethality. Even though I have enough .223's now to have a spare, I still enjoy the .22 Mag when it comes to carrying it and it feels awful comfortable in my hands. Nothing like a familiar rifle that you shoot often to give you confidence in the field!