my idea- slugs will give all shotguns an increase in their damage and total range. so say a pump has 100 total damage(25 per pellet) for 10 ft and drops off 5 per pellet(20 overall) to with slugs it will do 100 for 15 ft and it will drop to 25.
another idea is just keep the damage and range profile of the total pellets and just add over all range. lets use the 870 from BO2 it will do 400 for 10 m and then drop to 50 with the slug. it will be able to hit people out to 30 M.
feel free to leave your thoughts on my ideas for slugs and feel free to comment any of yours below :) just keep the comments clean thanks