I'm nitpicking between a mid contour 16" vs midcon 18" for a 3 gun upper. Both will be stainless with 1-8 twist. I will be shooting 55gr fmjs and eventually 69/77gr smk when I can warrant the use. Obviously a 18 is faster in velocity, softer shooting with a rifle length system. However would a 16" have an advantage in handling and small weight saving? Does someone have some first hand experience with this?