I dont understand the comment that slug shotguns are unsafe... I have hunted deer for nearly 30 years without incident. While a person can act safely or unsafely, firearms are only as safe as the user, dont ya know.
Maybe overstating things just a bit, but it's well established with testing that rifled slugs have a tendency to ricochet pretty violently when they strike the ground at a shallow angle, as is typical while hunting and missing.