take a few slugs and pass them through the barrel with the same wad that they will be reloaded with. you can us a bit of force with a dowel or something such. if you have to resort to pounding it through the barrel with a hammer maybe resort to plan B. plan B is playing with the alloy. accuracy can be improved by playing with the heat and alloy in any mold, more so with larger caliber molds than smaller ones. some will cut the petals off the wad or even resort to using filler wads. play with it until you get the results you want.