Academy has been carrying Winchester Q3131 lately for $4.23/box. Comes out to $211.50/1000. That's really about as good as you're gonna get around here. I'm not even sure if you can get it online for any less than that.
A lot of folks also seem to like cleaning out Wally World of their WWB .223 value packs whenever they have them in. They're $7.73 per box of 40.
There's one ammo dealer that's usually at all the local shows (has a black & red WOLF banner over his table) who usually keeps two or three full cases of Q3131 on the table for $225. He was also selling Wolf .223 for $115/case at the Denton show this past weekend.
Another dealer at the shows usually has Silver Bear, reloads, and he had some Adcom at this last show.
A lot of ranges around here won't allow the use of FMJ ammo. Those that do include the
Collin County Gun Range east of McKinney, Gibson's Outpost in Mesquite, and
TDSA south of Dallas which is a members-only range.
Here's more info on D/FW area ranges.