Its safe and it will do ya fine out to 50 yards.
Its basically the equivalent of a 58 or 60 cal black powder rifle.
20 ga. Slug
.609 dia.
2 3/4" shell
275 Grain Rifled Slug
1580 FPS @ Muzzle, 1513 Ft.lbs
1240 FPS @50 Yds, 931 Ft.lbs.
The nice thing about slugs is that you can buy boxes of just five of 'em in several different brands and see which the bore likes the best and you won't have to break the bank. Just don't go hoping for rifle tight groups. 4" at 50 yards is about the best you can hope for from a smooth bore with any slug.
