In all the years i have been shooting I have only shot 1 genuine 5 pellet hole group. the distance was 30 yds and the gun was my hw100 kt and the pellet was bisley magnum .177. the target was a pellet hole. as the 5th pellet went through i couldnt believe it and i still have the group today. there was obviously an element of luck involved. i have never done it again but i have come close. if i can do five 1/4 inch groups on the trot in still conditions at 30yds with my 97 springer rested its a red letter day.