I will confirm the sporadic distances around 40 to 47 yards with two mark 1 Tascos and 7 Mark 2 Tascos same as a BSA.
Now Phillip, i know exactly where you set it up and its the light!
Move the board and yourself in 10 yards to confirm.
On the other hand if done in that field Sat forget it.
March are progressive so are the clicks.
8mm 50 to 55 on 4 1/2", 6mm 55 to 60 way too much looks like doing a 3 1/2 to 4 ". Yours wont fit mine Berty
made it lost it