Modern Reloading 2nd edition by Richard Lee 2003-2004. List 2 loads for 223 with H380 one a 53 grain and the other a 63 grain interestingly with the start and max loads being equal 28.5 and 28.0 respectively. This data is from manufacturers and not tested by Lee.

Ed

A person who asks a question is a fool for 5 minutes the person who never asks is a fool forever.

The worst slaves are those that put the chains on themselves.