Yesterday I bought three boxes of Tula 223 55g steel and shot 'em at the range with my MP15. That's the first time I've shot steel and it ate 'em up like candy. Glad to know that since they're really cheap ($5.50/20 at Walmart). Accuracy's pretty much the same as with other 223/556 but they shot good. I wouldn't mind stocking up on them for SHTF but they're pretty dirty. I've been stocking up on ZQI 556 62g for such as occasion and only a few cents more per round. Also they're brass cased and boxer primed (and steel tipped). They shoot very well in my MP15. ETA: whoops, misspelled the title.