I just finished pattering my GM 32 in Smoothbore. I started with 7/8 oz 7 shot and 70 gr 3f graf's I used a 54 sabot and over card. I shot off hand at 25 yds pattern was very open with hole in center. I switched to 90 gr 3 F a flet lubed was than a 1/8 card wad than 10z of #5 shot than overcard wad. I shot five shots at 8x11 turkey head and neck target. I got between 7 and 10 shot in head and neck area. I had the target against an old 55 gallon drum which is now well ventiliated. The pattern was consistant and had good penetration. I now need to get it shooting RB.