A Smith and Wesson revolver in good condition is very capable of producing groups like that as I suspect Rugers, Colts, Taurus and others are. The thing is most people do not have the skill to do so. It takes lots and lot of practice to be able to shoot that good. Keep in mind when accuracy test are done the norm is to use a Ransom rest or the like. Just because someone can not produce tight groups with their chosen gun doesn't mean the gun isn't accurate very likely it is their marksmanship that needs work not the gun.