As it happens i weighed a tin of die 8 jsb yesterday, as I had to sit with Wife and watch Tv !
I would say about 7 were 8.3 or 8.2x thus Light
About 40 were 8.50 -59 with a couple making 8.62. so like me built with "extra"
most in the 8.40 - 8.49 range.
At tondu today i dialed in the 50m/55y setting and put the 8.4x through it for about 30-40 shots. height wise spot on and some very good groups despite gusting winds.
Shot the 8.2 batch and the height stayed the same
Shot the 8.5/6 batch and yep, all on the line, No dropping pellets.
So I will have to talk the wife tomight instead
Its handy to have scales to check a new batch, but current jsb exacts just dont need weighing.