“I need ammunition, and nothing else”
Two kinds of counter do this well, and they are different visits. Where ammunition is the main line, you are talking to somebody whose whole day is ammunition: bullet weights, what a pistol feeds, what a range allows. At a gun shop you can add a holster or an optic in the same stop.
Worth knowingEither way, call ahead with the exact load. No shop's website is a live inventory feed, ours included.

