In muzzle loading there are a lot of variables if most people were as consistent in the way they load as they think they are there would be a whole lot more minute of angle groups. Some people try thinks erratically and change more than one thing at a time; if they ever find the best load for a rifle its an accident. There are some people that can take a rifle capable of 1/2 minute of angle groups and not get any better than 3 inches. SO while I know there is some guns around that are not capable of really decent accuracy, most of the time its the shooter, you can tell most of the really horrible guns by the awful trigger pull.