The last bag of shot I bought was maybe 8 months ago, it was $28. I was in a reloading products store in Wisconsin last week, and it was was $44 per 25lbs bag. The rising price of lead is making reloading a senseless activity.
You need a press. Almost any gun shop that stocks reloading stuff will have a used Mec 600 jr. somewhere for around $80, all set up with dies and everything. Get a copy of the owner's manual from MECs website, if it didn't come with the machine.
http://www.mecreloaders.com/OwnerManuals/OwnerManuals.asp
Buy a loading guide, I think the Lyman is the best, about $30.
Pick a load. You will likely need to buy a couple of loading bushings to throw the right powder and shot weights, maybe $5 each.
Obtain hulls, primers ($40/1000) powder ($30/lb), wads ($12/500) and shot (currently ~$40/11kg, changes by the day). It will take you over an hour and cost about $22 (before tax) to make 100 rounds.
Or, you can go to the gun store and buy a flat of 250 for what, $55?
That's why there is a used press in every store, people are giving up shotshell reloading in hoards.
Now, if you wanted to load your own buskshot, bismuth or cast slugs, or wanted to become one with your ammo, it might make sense. But for birdshot target loads, there is no financial justification anymore.