You can shoot both Foster-type or Brenneke-type slugs, (they're safe in a full-choke) but as others have noted, accuracy might not be too swift! You will need some kind of a rear sight! People don't use rifles without sights, but they often try to shoot slugs, which are a whole lot less accurate, without sights! Then they wonder why they can't hit anything!

Test a bunch of different brands. Accuracy will vary considerably from one make to the next. use the ones that group best, and zero in your gun to shoot to point of aim with the kind you select.

This is total BS of the worst sort - a complete OLD WIVE'S TALE!!

Leading might build up if you shoot enough slugs, and leading might mess up patterns, but a thin skirted, hollow-based soft lead slug cannot remove steel from the barrel!! If leading occurs, it is a simple matter to scrub it out with solvent and a bronze bristle bore brush.

I don't think the guy was saying that steel would be removed, I think he was saying that the restriction (choke) would be expanded after pushing lots of slugs through it. Can't say anything about that, as I haven't done it.

I'm sure each shotgun is different, but when tried it at 50 yards with my 870 full choke 30" barrel, I grouped a foot high and about 4" left!!

It was good to know, but I bought a slug barrel. They are cheap anyway :-)!