Optimizing 223 loads for a short barrel.

[markm]

That load is .3 gns over max, but all my rifles, 18 mid, 14.7 mid, and the 10.5 carbine run it fine. No signs of pressure. All are chambered in 5.56.

Powder lot variances are so great that load data is really a rough approximation. You could probably go hotter if you wanted. I often use published max as the starting point for .223/5.56 loads.