Wolf Gold can be found on occasion for like $305 shipped for 1,000 rounds. This stuff is labeled as 55 gr .223, but it's velocities are pretty much in the m193 ball park. This is my personal favie as you can get it from SG Ammo pre packaged in cans for only a few dollars more typically.
Wolf Gold is my current fav as well. Loved by AR & SCAR alike. Shoots very clean, too.