Harry Fuller stirred the hornets nest over here on the bbs, and for all his doubters, it can be done, I achieved it but it took me over 15 attempts ( 5 shots per group). I am not good enough to do it consistently, but the group size he is speaking about, is definitely possible. I thought I would try and do it again today, but I failed as the winds were not very kind to me. Will try again when the conditions settle. Did this with a 18 ft/lbs rifle.