I guess i should add that I've only fished(tested) the 18's.My first experience was cronie fishing in deep water, lots of bites and only landed a few.Also on the Bow nymphing, same result.Nice hooks but fish don't stay on.
I did a comparison one day on the Bow, fish were hitting little green so i had one of each.The barbed hook with it squished down out fished the barbless clearly.I also made sure the barbed one passed the barbless test.
Maybe its the large gap or the point and the bump has nothing to do with it i don't no.