I only buy OEM when I add a cartridge but when I do I used to use SGAmmo. They have steel case 9X19 for $319 per 1K and $419 for brass case FMJ. Steel case .223 REM is $360 per 1K and steel case .308 WIN is $300 per 1K. Not sure if that's a "good" price or not right now.
That looks like the makings of a good day at the range. I hope you enjoy it. I have shot it a bunch in the past, and still know dozens upon dozens of competition shooters that shoot it to this very day. I'm pretty picky about my ammo and these are one of the few folks that I would actually buy ammo from.