Ruger used to make one in the Security Six line. S&W made a 5 shot for a while also , but it wouldn't be very good for IDPA. The S&W 610 and 625 models are really the best choices available right now. The nice thing about them is they can both be downloaded to shoot as soft as a 9mm since revolver power floor is only 125. Think about it - a 45 ACP, 230 gr ball, only needing to have a velocity of around 550 fps. Very soft shooting.