ORIGINAL: kevin1
You could also try stepping down to #6 shot to put more pellets downrange, it should fatten your grouping enough to stretch out to 40 yards confidently.
I was thinking the same thing. I will probably go get a box of hevi-shot #6 and try that. One thing just occurred to me though, if hevi-shot is supposed to be 20% denser than lead, then for a given 2 ozload, does that mean there is 20% less shot?