I have a rifled choke made by cation for my 1300 winchester.http://www.cation.com/choke-tubes.html This choke is well made and is $43.95 + $4.95 shipping. It doesnt shoot regular type slugs very well although it says it can by the manufacturer, but will shoot the sabot type extremely well. I got alot of leading with the all lead type.My friends 870 is the same way except he uses a factory remington rifled choke. His is extremely accurate out to 100 yards with sabot slugs. I think it is worth the money if you plan on shooting sabot slugs. Leave the foster type or regular to smoothbores. Good Luck!!!!!