I just purchased a rem 870 supermag andf am hing problems srewin both the undertaker an tru glo choke tube in to the barrell. The remington factory tubes go in fine. I am having a problem where the thread on the bottom of the choke meeets the smmoth part of the choke. I can onlyinsert the choke tube about 1/2 in before it becomes to big to slide in to he barrell. it feels like I would have to forecc these aftermarket tubs with alot of pressure from my hands.

Ifanyone has had a problem with this pleas let me know

Thanks,

David