User blog comment:Hayashi H/Advanced Equipment Guide/@comment-114.125.12.189-20151105060725/@comment-749631-20151110200606

Simply put 20.3s on CL should not cause any problems and should be the way to go. Just that if you willing to sacrifice one or two point firepower for several points higher accuracy, then switch out one 20.3-series for a 15.2 kai. This is how I interpret the source.