Most shotgun cartridges are meant to be fired from a smoothbore barrel, as "shot" would be distribute as well huge by rifling. A rifled barrel will increase the accuracy of sabot slugs, but can make it unsuitable for firing shot, as it imparts a spin towards the shot cup, https://243-win-50-ct26809.blogzet.com/not-known-facts-about-ammo-inc-ammunition-38-special-125-grain-jacketed-hollow-point-box-of-20-50249156