For use in a smooth bore either the Forster slug or a Brenneke will most likely be your best bet. Depending on what you intend to use it for might make a difference with which you' d prefer. The Brenneke is usually heavier than its counterpart Foster style, it is usually " harder" (meaning it is more likely to penetrate better and expand less), and some smooth bores prefer the Brenneke style. On the other hand Foster' s tend to be a little less expensive, are " softer" (tend to expand more and penetrate less), and with the major ammo manufacturer' s making their Foster' s all to a slightly different diameter you might find that your gun prefers one brand over the others....and shoots it extremely well.

What you intend to use the Slugs for may help determine which you might prefer. Assuming you find one that shoots well for you, (and I' m assuming you probably have the barrel with rifle type sights), any of them will kill deer very efficiently with a well placed shot. If you intend to use it for heavier game then seriously look at the Brenneke' s. They tend to out penetrate the Fosters by a significant margin. In Alaska we often used a New Haven 600, 12 gauge, with Brennekes in it for a camp gun in case of bears. (The New Haven 600 was made by Mossberg and was essentially just a Model 500. Like Marlin use to do with Glenfields.) I had every confidence in the Brenneke' s ability to penetrate enough to do the job. I would not have preferred to use Fosters for that!

You might very well have to try several brands and styles to find the one that gives you acceptable accuracy for your needs. Good luck with the search!