I recently bought some Starline .357 magnum for 18 cents apiece because I never find more than few pieces. I like it well enough, but like the RP stuff I occasionally find just as well. A few weeks ago I bought 600 new PPU 38 special for less than 9 cents apiece from Graf's on closeout, and like it too.
These days I don't use anything 9mm that didn't come from the range in the first place, and is thus easily replaced. I've got large working populations of WIN, Blazer, .FC., and RP. All work great separated and loaded as lots, but the QC (or lack thereof) on WIN results in some culling. With some effort I'll still lose more than a few if I'm firing full-power ammunition, so I save the Starline for the revolver.