RE: Slug gun
One of my best huting buddies is a one gun man - Remington 870, hastings rifled barrel,Leupold Vari-X III compact 1.75-6x40 mm. Uses a Winchester brand sabot. Not sure which. He's killed hump-teen deer with this set up. Many well beyond 100 yards. I do not recall any misses or "failure" to recovers.