Rainier doesn't use a whole bunch of different boxes. That box would have likely been a 1000 size package for 9 mm or .357 bullets. The packing guy might have just grabbed whatever was close, without seeing the label. I wouldn't let it bother me too much.
IMHO, $80 for 500 bullets isn't especially spectacular (not horrible though.)
Berry's will save you a few bucks, if you order 1000 count boxes. They come w/ free shipping once you spend more than $50.
http://www.berrysmfg.com/product-i14..._230gr_RN.aspx
I have ordered Rainier from Midway in the past, though I will typically wait for a sale or some sort of discounting. Shipping @ Midway is getting pricey of late, though.
JMHO, but .45 acp screams out for cast bullets. But that's another thread.