I ran the question of powder capacity in QuickLoad, using both 556NATO and 223Rem default settings. Quickload thinks you couldn't stuff more than 28.0gr of any powder in those cases and that would be HEAVILY compressed charges of a worthless powder (RL-33) for the cartridge.
It also thinks that your top load of 24.6gr 2230 is already over pressure, at about 62,000psi.
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Nobody plans to screw up their lives...
...they just don't plan not to.
-Andy Stanley
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