This is NOT good news.

A post from someone else on another forum.

Everybody assumed that the X in the serial number meant
it was new build and no muzzle grinding but that appears to be wrong.

The fact Cabelas is closing them out and not getting back into them says a lot.

"Inspected a 450/400 Sabatti with the X through the last number at the Buda, TX Cabelas today. both barrels had the dreaded "dremel" regulation. It was somewhat subtle and you had to look for it. The muzzles were completely round. the rifling was ground flat but it did not compromise the thickness of the barrel so the muzzles are round but the rifling was ground to the bottom of the grooves.

The "closeouts" are priced from $3799.99 to $4499.99 for new guns either EJ or EXT. The closeouts do not come with their 30 day guarantee I was told"