The Ruger Blackhawk with 5 1/2 inch barrel and heavy 45 LC loads is a handfull to shoot. Off the bench I would quess you are flinching or jerking the trigger. I have trouble off the bench with the shorter barrel. I quess I am having the same trouble. With a 6 inch or longer barrel you will find that most of the inconsistancy seems to go away. With Short barrels I shoot much better off hand. If you are consistant offhand then I would go ahead and use the blackhawk. Our state in its wisdom allows the 357 Magnum But not the 45 LC. This because there are no factory loads they have found for the 45 LC that meet the minimum ME level. GO FIGURE![:@]