Just to be clear, I was not being facetious by any means, it was a genuine question, which you seem to have addressed accurately, not that you would do it, but it does appear that with your set up at least it would be feasible to zero at ten yards,and just to add, if I fit a new scope or get a new air rifle, my initial zero,at home is at ten yards,interestingly enough, when I then take it out much further, I am never far off,sometimes bang on in .177 at least, so the question does have some merit.