Commercial 223 brass is marked as such. If it's not marked as 223, assume it is 5.56. Weigh it and compare to the weight of 223 cases to find out whether you need to reduce loads due to thicker brass. My main problem with 5.56 brass is the primer crimp which has to be removed before repriming. I usually give away all the 5.56 brass so I don't have to fool with primer crimp removal.
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Jim
CBOB0497
"That rifle hanging on the wall of the working class flat or laborer's cottage is the symbol of democracy. It is our job to see that it stays there."
- George Orwell
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