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.
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Bullet of your choice and RL10x or AA2015 for powder. If you have a chrono move up to IMR3031 or AA2230 if you want to try to get more velocity.
kwg
I like 24.6 grains of 3031 for accuracy. I don't own a chrono so I can only speculate on the velocity. But it is accurate out of any of my 16" rifles.
Yeah. I am thinking I could go much higher, but 23.3 is getting me to the velocity needed for 68BTHP to work so I don't see the need to shove it further. :)
Max loads are subjective.
Try the 60gr Nosler BT. They look like the Sierra Blitz King and the Hornady V-Max.
They are very, very different though. (Much tougher) I am a hunter and don't know much about human bullets and tactical stuff.
H4895 & Benchmark will serve you well.
Slower powders can make the rifle cycle harder.