After more than 100 years of choke bored guns with standard forcing cones that shoot just wonderful patterns, why would we drill out our forcing cones because someone says that it will improve patterns? Does it make patterns tighter? Does it make them more even? Does it add to the center thickness? Maybe Chuck can clarify that. Drilling out forcing cones costs money and takes metal out of the high pressure area of your gun. Why would anyone drill the cones out of a double barrel shotgun unless he were making a living shooting that gun for serious money? My experience is that the "gun rapers" don't shoot very well and are looking for a crutch.