Differences between hodgdon and hornady manuals

[Skinny Shooter]

I can't get on RRA's website for some reason but found this which someone copied from their site:

The .223 Wylde chamber was designed as a match chambering for semi-automatic rifles. It will accomodate both .223 Rem and 5.56mm NATO ammunition. It is relieved in the case body to aid in extraction and features a shorter throat for improved accuracy.
Some call it a hybrid between 5.56 NATO and 223.

If you can recommend another powder that is in the Hodgdon Extreme line of powders then I'm willing to look at it.
I've got 9lbs of Varget though to use up.