Winchester makes a Rackhammer and Rem make a Buckmaster (or something of the sort) which you can use in either rifled or smooth barrels.I get pretty good accuracy with them in both a Rem 870 rifled barrel and a Browning BPS with Imp Cyl choke. Given that I'm partial to big chunks of lead, I'd rather sacrifice a little bit of accuracy (and it really isn't much) in my rifled barrel and toss an ounce of lead rather than a wimpy 250 gr. bullet.