I recently got 1000 rounds of Blazer 230 gr ball for ~$170 including shipping from Natchez (www.natchezss.com). It is the aluminum case stuff, so if you reload, it is not worthwhile. I shot a bunch in my gun and it works fine, so I ordered a bunch more. Usually, I order from Ammoman.com, but since I don't reload and outside of Wolf ammo, the Blazer stuff is the cheapest factory ammo I have found. I believe the sale goes on through the end of June.
By the way, I have read several posts where people were not happy with Natchez order filling/customer support. I have ordered from them three times with no problems.
Currently outdoor-source.com is running a case special on .45 with very reasonable shipping. It comes out to about 7.95/box (for comparison's sake). I ordered some as well as 9mm. Oops, I forgot....I assume you were talking about plinking ammo? This is S&B, which is what I use for blasting.