Yep its .223. I got AR2208 because I went to the local gun city and asked what to use and they said I dunno, here have a printout of ADI load data. It was the only powder that they had in stock in a 500 gram that had data for the 40gr vmax and 55gr tsx which were the two projectiles I had.
Now after a bit more learning I would make a slightly more educated choice. But I am saving for a 6.5x55 rifle so the 2208 will be good for that later on.
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