I have the latest lyman cast bullet book, it doesn't have much in the way of "loads that will cycle" for gas operated guns like ARs and SKSs

I'm also working up a load for the yugo SKS I bought from you, I have the lee 160 grain mold. I'm trying 2400 based on some forums I've read indicating some rifles will cycle with 2400. I have a ton of it and use it for reduced rifle loads in most milsurp cartridges already.