This gun has been out there from 1980s so I'm sure most work well. The 20" 20ga I had in early 90s fired left barrel only about half the time after trigger was pulled so if you pick this brand make sure it works. On the upside the gun shot Foster slugs real well. I would pick 12ga and bunch of Federal Premium Truball Penetrators to practice a lot with. These slugs have copper jacket and with avg. Vo of 1350fps the recoil is acceptable. Another upside is no stubborn lead deposits which have to be removed by soaking with stinky Hoppes lead remover overnight when plain lead slugs are used.
PS. Brenneke Black Magic Magnum is often recommended for bear protection though it will kick hard and truth be told I'm not really convinced it is better choice than Truball Penetrator.
