A QuickLOAD model is showing that a 175gn SMK at 2.10" and 8gn of VihtN110 would put you at ~64% case capacity and in an 11.5" should be <1050 fps.
As to whether or not it will reliably cycle your system remains to be seen.
In order to get a 147 or 150gn subsonic requires a powder with more volume than N110 to get above 50% case capacity and in doing so has a much sharper pressure curve not suited for cycling an AR.