RE: what ammo for mossberg 500 slug barrel?
I got my gun clean. A little solvent and brush time, and alot of patches later I can' t see how anyone can consitantly use rifled slugs in one of those (I know of some people who do), but it didn' t do any damage or anything. (ok, I won' t shoot the things in my gun anymore[X(] But I was only going to do it that one time anyway).
Now, I was always told that the rifling on rifled slugs don' t really impart any appreciable spin to stabalize the slug, that the slug is stabalized much the way as a badmitton bird is stabalized in flight (with the weight being on the forward end of the slug). And that the rifling was more of just a way for the slug to be shot through a choked gun without damaging the barrel. The slug would just deform where it squeezed through the choke.