I posted this response in another thread sometime ago, but for those that didn't see it I will repeat.
I finally had Cabela's replace the original rifle I had. The rib at the muzzle started to lift, it was sent to Florida for repairs and I doubt anything was really done to it. Upon receiving it back I put a scope on it to see if it would group that way and within 20 or so rounds the rear of the top rib came loose, could actually lift it up 1/2", this is when I discovered the barrels were blued under the rib! Indicating to me that they were so done before the rib had been attached. This is when the s**t hit the fan so to speak. The people at Cabela's were very nice and went out of their way to settle the problem. I opted for a replacement rife in the same caliber.

The new rifle is a shooter,factory ammo (Hornady) shoots within 2-3" composite group at 50 yards, however handloads with Privi 286 gr bullets will shrink that group in half. The only thing I don't like about he new rifles is the "Opti wood" stocks. I have restocked mine and waiting for the checkerer to get the wood back to me, can't wait. Its not real fancy but has color change through out with a moderate amount of fiddle back and the grain runs nicely through the wrist.

If this rifle is any indication, I think Sabatti has decided they needed to make some changes, my serial number doesn't have an "X" in it but it will do the job nicely. When I selected this rifle, I went online to every Cablea's gun libary and looked at the regulating target, selecting the one that seemed to have the best target, if they didn't post a target with a rifle it was not considered, right/wrong or indifferent it seemed to work for me. There no grinding at the muzzle.
Bob