I was given a 222 Browning BLR for a gift once. I have to say, it is one of the most fun and enjoyable varmit guns I have. I have even killed 3 deer with it! It is a fast flat shooting little caliber, and extremely accurate. No kick.
At my local gun range, they have these bullets for 10-12$ per box of 20.
You cand find the ammo ok. Also you can reload easy enough if you reload any of the other 22 centerfires. Alot of the mail order places like Natchez supply and cheaper than dirt have 50 grain psp in rem and win for the same price as the good 223 ammo. I have one in a model 70 and can't believe the accuracy even with factory ammo. If you pick one up in a well made gun you'll be pleased.