My local WalMart stores carry Federal Champion and Remington Golden Bullets value packs. Both feature hollow-point bullets, and both are plated and considered high-velocity loads (although the Federals seem to be a bit weaker, in the last year or so...).
If you want round-nose, non-HP ammo, well, that's a little harder to find. There is a new CCI load designed for AR-style .22s, but I don't think it's going to be cheap, as it has the word "Tactical" in the name:
CCI Ammunition - Product Detail
Remington used to offer a plated round-nose bulk pack, but I'm not sure if it's still around. I have a few boxes of it left, but it's got to be 20+ years old. Old milk-carton style boxes that held 450 rounds.