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You're probably right. I was referring to 55gr in general. Most of the book max loads for 55gr .223 are on the pussy end of the spectrum. Especially when fired from a NATO chamber.

That charge will probably be anemic. H335=win 748, I've run it at 28grs with 55gr loads and federal brass no problem. Nick Harvey lists 28 gr as the max charge for 55gr in his book.