I finally got a Lyman mold for the sabot slug, cast up 50 of them out of ACWW and using 23 grains of Unique loaded up 30 of them. At 50 yards I get three holes touching and all is well. At 100 yards, I get 12" groups. Is this normal for this slug? because it's a wadcutter design does it de-stabilize past 50 yards? Do I need to fill the back of the slug with a hot glue? Any input would be appreciated. The shot gun is a Remington 870 with a Hastings barrel that was made in France...