I love the mini shells. Instead of 9 in a Mossberg 590A1, there are 12. Less recoil due to less power but no factor on soft targets. The slugs are devastating since they carry 3 times the power of a 44 magnum, but they are really controllable on recoil. The buckshot is sweet and patterns nicely. At 25 yards, about a 4 foot circle. Guaranteed to break molotov glass.
http://www.paradigmsrp.com/gator/
Have one of the early versions on a Benelli M1 ..... #4 buck makes a lot of crawlers versus walkers. Skip shot off a road or sidewalk turns the tide and makes surgeons money..... Also sets the example for the next generation.