Go to a range and shoot your slugs. I use a 30-30 now but the last 2 years slugs. My Ihica 37 shot groups of slugs in a 3" pattern at 70 yds. However my son's single shot H&R missed the bulls eye by 12" at 30 yds.We are selling that gun. I shot a hog with 00 buck at 10 yds with my Ithica. It kept running. My next shot I hit her with a slug.Instant death. When I skinned the hog the 00 buck broke 3 ribs and hit the vitals but she kept on running. Make sure you use the right slugs for your gun.
God Bless,
Chuck