Guns Unlimited 120th & I has a fair amount of reloading equipment, probably the best place to pick up powder in the area. They aint got much for cheap bullets (ie: berry's etc), but do carry a lot of hornady bullets.
Primers, they're mostly Winchester, but do have some CCI and other stuff floating around. Last time I was in there, they had 40 or so Mec shotshell presses.
Speaking of which, it's been a while since i've been in GU so I dunno what their shelves look like after all the panic crap.
When you do walk in, do take a look to the right and back of the store... it will look like it might be 'not for customers' or storage area, but there's A LOT of shot shell stuff back there etc.