I have 4 guns I can hunt deer with. A muzzleloader, a 1187, a 870, and a Mossberg 500. Both the Mossberg and the 1187 have cantilever mounts. I don't think you can get a better style of mount available. "If" Iwas was in the market for a dedicated slug gun in 20 gauge with a cantilever mountI'd look real hard at the H&R Ultra Hunter. Although it's single shot and in my mind ugly as hell, it's got a heavy barrel and from what I read it just throws slugs great.