shaman, it must be farther south of the MD line than we are here. I don't know of any .22 centerfire use for the armored deer but the .243 is quite common. Here in WV any centerfire cartridge is legal for deer hunting with a rifle. We do use saboted projectiles with the tungsten "dart" like the Abrams tanks do.
Actually I'm a cheap bastid and use Rem Core-Lokts in my .243, 7-08, and have used them in my '06 (now 165gr Hornady flat base for a change).
Crawfish, I have a .44 mag but I am a .41 believer. I have been going to therapy.