Mastevt

I've got a rifled barrel, so I quess I'm partial to that, but if I had a smooth bore, I would definately try federal's "trueball", they come up with a design that uses a small plastic ball that fits in the hollow on the back side of the fostner round. It stops the slug's skirts from damage during ignition, thus helping the slug travel down the barrel more effectively and that results in better accuracy. Either choice are good. hope this helps, Scott.