The .223 Remington shelf runs from 55 grain bulk FMJ for high-volume carbine work to 69 and 77 grain match loads for precision shooters, with polymer-tip varmint loads in between. Federal, Hornady, Winchester and PMC keep it stocked.
Know your twist rate: faster 1:7 and 1:8 barrels stabilize the heavy match bullets, while 1:9 favors 55 to 69 grain. Ask at either counter if you are not sure what your rifle prefers.