3031 is my favorite 223 / light bullet powder! Light bullets being anything less than 75 grains, to my thinking.
Somewhere's around 23 - 24 grains of it ought to put you in good company, of course after you work up loads in your rifles.....standard disclaimer here. As with all Internet load dope, it's worth what you paid for it!
I haven't owned a rifle yet that wouldn't shoot snarly little bugholes with that powder!
Cheers!
Redial