Here are a few tips we have found over the years. Being across the river from Iowa, slug hunters abound. Depending on what type of gun your using this one tip will help alot. Clean your barrel, install it as tight as you can get it. Sight it in, do not remove the barrel at all. Clean the gun from the muzzle end. Next tip, if using a scope, what mounts does it have? If its a side mount that is held in with the trigger pins, pretty much crap. They will get you by for close work. What most of the die hard hunters did was to get a cheap rem 870 or mossberg 500 and make a dedicated slug gun, drill and tap the top of the receiver for standard rifle scope mounts and rings, this will
get rid of the play in the side mount type. After all this is done, then you can start playing with different slug types and brands. We had many customers that could get 2-3" groups at 100yds consistanly.