I saw some CCI 300rd packs one time at Walmart for about $20. Another time, I got 3 of the last 4 bulk packs of Rem. Golden Bullets for about $28, the guy behind me got the last one. I prefer Federal bulk but I can't find it anywhere. This was over a 2yr. period.
Big Boys down in Mustang frequently has the Federal Automatch 325 packs for like $24.99 (limit 1). They always seem to have CCI Mini Mags too. (limit 2) I bought some CCI Standard velocity (limit 2) there today as well. And the Academy on NW Highway had a whole boatload of Mini Mags at $7.99 per 100, Aquila at about the same price level, and some high-dollar Federal Target stuff they have been trying to sell for $19.99 per 50 forever. The limit at that Academy is now 1,000 rounds or two bricks, if they are the big bricks.