Count me among those who haveshot Foster style slugs from a fully rifled barrel for years with no ill effect. While I've heard many people say it will "ruin" a barrel, no one has ever been able to explain to mehow a soft lead slug at low pressure and only about 1600 FPS was going to damage a modern chrome-moly barrel. When i ask, the answer is invariably "that's just what i have always heard". As far as the accuracy goes, foster style slugs shoot much better out of my 870 Wingmaster with a fully rifled factory barrel than they do out of my 870 slug combo with a smooth barrel. I do most of my deer hunting on the ground, so shots tend to be within 40-50 yards, as a result i never felt the need to buy the much more expensive sabot slugs. In my experience the relatively huge frontal area of a 12ga. Foster slug (about .730 inches) combined with their relatively heavy weight makes them devastating at the short ranges i use them at. They absolutely kill like the hammer of Thor! For the few times i might encountercircumstances where i might need more range, i just break out my CVA Optima Pro. Withas much success as i have had with them, I'll continue to use Foster style slugsin my slug gun.