Thank's for the replies,
I was thinking of writing the offset on the scope cover with a non permanent silver marker. I thought one offset figure would be enough but last week at E.Devon I was 14 clicks low at 55yrds!! and only a couple of clicks low at 8yrds So I guess I will need a few figures on my scope cap. (As you do with your card Rob)
All of this adjustment and checking might become a little fiddly at an unknown shoot with a questionable zero range and a strong wind!!
Still, as said already, It's all part of the fun of FT!
Anschutz 2013 MEC1 .22LR
Miroku 3800 12bore