Dean2, Ive fired them through O/U and side by sides. They are made to pass through all variants of choke for safety sake but you get better accuracy the less choke there is. Unless it has special slug sights or proper irons I wouldnt shoot it at anything with four legs at 100 yds ! My eyes cant do that anymore, with no sighting system I doubt you would do better than 12" group, with sights a different game, best