Cabela's, while high priced on most things is a good place for reloading supplies. Midway is good as long as you don't get anything like powder or primers. They charge extra for shipping of that stuff. Much more so than other internet sellers. Cheaper than dirt, midsouth shooters supplies, Shooters warehouse, there's tons of places on the internet that are good. Gander Mountain, if your in MI Jay's is good, and William's Gun Sights.
The thing with getting primers is that their CHEAP! When you see them, get a
BUNCH. I couldn't find them at all for about 6 months, but when I finally did... I won't run out again for the rest of my life now!