There might be slightly "more right" options on the market, but there's nothing "wrong" with what you have going. I've used 50grn V-max's out of 16" carbines for a long time, been satisfied with them as much as any bullet. I haven't ran Ramshot, but if you're getting good velocities and repeatable ignition, what could there be to complain about?
For a calling rifle in normal calling environments in the midwest US, a 16" is plenty. I don't like the balance of carbines as much as 20" models, but the carbines have enough range to do that job just fine. If a dog hangs up at 500-600yrds, holding a carbine can be frustrating, but holding any 223rem when they hang up at 800yrds is frustrating too, so there's not a lot of difference in real world application.
My "ideal" coyote hunting AR wears a scope, in this case, a Bushnell Elite 6500 2.5-16x50mm Mil-dot on a Burris PEPR QD so I can swap it between 3 matching uppers in 18" 6.8SPC, 20" 223rem, and 22" 204Ruger. I suppose I could easily be convinced that a 6-6.8 20" would eliminate the 6.8spc and 223rem. Having the PEPR QD, I can swap out for folding iron sights or a Burris FastFire III or Bushnell TRS-25 in a matter of seconds. I also have a cheaper Bushnell AR 3-9x40mm in a Nikon M-223 mount to be able to run two uppers at the ready.