RE: Rifled slugs in the smooth bore?
DON'T USE RIFLED SLUGS IN A RIFLED BARREL,USE SABOTED SLUGS
USE THE RIFLED SLUGS IN A SMOOTHBORE, CAN BE USED WITH A MODIFIEDCHOKE OR IMPROVED CYLINDER CHOKE. NOT A GOOD IDEA TO USE FULL CHOKE AS SOME ARE TOO TIGHT.
ALSO DON'T USE THE SABOTS IN A SMOOTHBORE, UNLESS YOUR USING A RIFLED CHOKE TUBE
slug technology has come a long way but all barrels shoot differently
so you may have to test a couple different brands to see which one your gun shoots the best. my 11-87 smoothbore shoots a 2 inch group at 100 yds using the cheap winchester 2 3/4 in. slugs through an improved choke tube.i'm happy with that !!!