define "tactical". a rifled barrel will spin whatever projectile is fired through it. If its shot, the column will spin and centrifugal force will cause the shot to radiate outwards in a circle. You get a big donut pattern. Some foster slugs like rifling, others dont care. Sabot ammunition is expensive but fires a large caliber rifle bullet with a better ballistic coeffecient. Smooth bore is my choice as it will fire a wide variety of ammo. Threaded for chokes is even better.