So, you got only another 10 yds by losing 50 grains of mass?
I am going to have to rethink my philosophy on matched sets of arrows. Maybe matched spine is all you really need to worry about. Maybe matching mass is just fussy piddling around? If the only gain in flight shooting is 10 yds for 50 grains of variance, the variance at a 20 yard ethical shot on deer means diddly squat or LESS!