Lots of good comments here. Ways to save a few $ when you reload:
1. You'll sometimes find reclaimed shot available, typically $30-35 per bag. A lot comes from trap ranges, so there will be a lot of 7 1/2's. I don't use it too often in loads any lighter than 7/8 oz. I've also found that it can stick in the drop tube of my 20ga reloader, so I mostly use it for 12's.
2. Buy cheaper primers and wads. Cheddites vs Win or Rem; Claybuster wads. Reloading websites are carrying more recipes for Cheddites these days, although in most cases, ballistics seem to be pretty close to Win primers.
3. Be a hull scrounger. You won't find many guys tossing once fired AA's or STS. But Rem Gun Clubs (both 12 and 20) reload about as well as STS, and I'll often find them scattered around when I'm shooting targets.
And your biggest savings:
4. Shoot lighter loads. 3/4 in both 20 and 12 are much easier now with readily available wads and recipes.