Even a rifled choke in a smoothbore may not release the sabot from the bullet - causing it to tumble. The only sabot-type solution I have seen for a smoothbore is the Brenneke K.O's. (yellow trimmed box) It's a Sabot with a "pusher" that will get the slug spinning in a smoothbore. Sluggers seem to be the fodder for smoothbore guns, but with barrels a relatively inexpensive option for many shotguns, I'm at a loss as to why people still use them. The technology behind sabots is really something. I was shooting Remington Accu-Tips and Hornady SST's and was quite surprised at the groups I was getting at 100-yards.