Re: Is something wrong with my chamber?
The neck area immediately in front of the shoulder is not normal if the cases are as fired, and haven't been resized. That area of the case is being fire-formed to the actual shape of the chamber. I would call Remington, or email their tech support and find out if they shaped the chamber that way for a reason, and if so, what reason. If it's not done that way on purpose, they need to take it back and fix it. If you have doubts and think it might be the ammo, shoot some different ammo and check it before you contact them. But my money is on the chamber and any ammo you shoot in it is going to look like that.
From the pictures, it doesn't look unsafe to fire, but it doesn't look right either. You need an answer from Remington.
Good luck, Tom
Texas State Rifle Association Life Member
NRA Endowment Life Member
A big fast bullet will beat a little fast bullet every time