Looking for help with lower power .223 loads

[sniper7]

Well, between night vision and a suppressed AR, I want to load some lower velocity 223 loads. Went shooting the other night and it was pretty much magical, except for listening to the supersonic crack sound light a fighter jet going over. But even that was pretty cool.

ive researched subsonic and don't want to deal with it for 223. I have a .22 suppressed that shoots subsonic and cycles the gun. I'm not interested in a single shot AR

basically I was curious if you guys have done any load testing for lower power, and lower noise that will reliably cycle an AR. 16". Can be either 1/9 or 1/7 twist as I have both.

and also, is it even worth it? I'm sure I will still hear the supersonic crack traveling after I shoot. The suppressor is definitely quiet enough even shooting standard m193 rounds. But I think it could stand to be a but more quiet and possibly cut down on the supersonic noise as well.

let me know your thoughts