So QC at IBI missed it and the person who put it on the receiver also missed it....
IBI will sort them out. My dealings with them have been stellar and the barrel I got for my T1x is fantastic.
If you begin complaining publicly instead of contacting the supplier first, you are an attention whore. #### happens, unless you are brand new to the game and think you are rediscovering the wheel.
I wonder what the fit of the bolt and or extractor is like? Did the extractor contact the very thin wall in such a manner that it chipped the barrel?
Might be an idea to make sure there is nothing going on with the action before installing a new barrel.
Incidentally, machining those extractor cuts would be more challenging than doing the cuts on just about any other .22 rifle. Wonder why they are designed like that?
Larger extractor slots are there to be able to set headspace for different ammo.
Screw the barrel in or out slightly as required? If the barrel shank threads are, say, 16tpi, a 1 degree change would be less than two ten thousandths of an inch. Not much adjustment available.
Honestly it's quite common with Americans. Wife worked for 2 American companies as customer service. And got alot of the I posted this already on Twitter or other social media responses.
It's just as common for Canadians to go scorched earth.