Turk, I hunted with a 20ga/.62cal trade gun for several years, in mine I found that a 1oz load of 6s with 70gr 2ff goex provided the best shot density I could get at 15-20yds max and that was using paper shot "cups". I just used copy paper rolled around an appropriate sized dowel, folded the ends over and glued an over shot wad on the end, filled it with shot, then folded the other end over and glued an over shot wad on that end too. Loaded it just like a projectile but on top of an overpowder wad. It took some experimenting to get loads that opened up mid flight, some stayed intact all the way to the target, other opened in the bore. After finding the load that worked well, I hunted with it for several seasons, but never got a turkey close enough for a clean kill at 20yds, 15yds was even better. 7½s might have worked better, but I never tried em. hope this helps, Tim