I am considering putting holt melt glue in my Lyman 525 12 gauge, and 350 20 gauge sabot slugs. I currently get about 2" groups with each at 50 yards. What kind of accuracy improvement should I expect with the addition of the hot melt glue in the hollow base. I currently just use a hard card in the shotcup. Should I expect the accuracy to improve at 50 yards, or doesn't it show up till 100 yards, or so?