I have some Kent spreader loads and on the outside of the hull it says Spreader Sporting. Other than that, there is nothing in the appearance to identify a spreader load from a non spreader load. A spreader load usually has a special wad or a plastic insert in the shot column that causes the shot to spread more than normal. Once the shell is fired, there is no way that I know of to tell if a spreader load was fired from the shell.
Besides, if a person wanted to hide it, it would be almost impossible to detect unless you took all his shells and cut them open before he had a chance to fire them.
In FITASC, reloads are also prohibited, but I've never seen anyone grab someone else's shells out of their vest and cut them open to determine if they have been reloaded. Some reloaders do such a good job that a reload is hard to tell from a factory load even if you examine it closely. I'm not suggesting that anyone should cheat. I just don't think that cheating on the type of load used is going to be of much, if any, help anyway so I don't worry about it.
Besides, if a person wanted to hide it, it would be almost impossible to detect unless you took all his shells and cut them open before he had a chance to fire them.
In FITASC, reloads are also prohibited, but I've never seen anyone grab someone else's shells out of their vest and cut them open to determine if they have been reloaded. Some reloaders do such a good job that a reload is hard to tell from a factory load even if you examine it closely. I'm not suggesting that anyone should cheat. I just don't think that cheating on the type of load used is going to be of much, if any, help anyway so I don't worry about it.