SDW,
The bolt wear is the finish coming off a new phosphated bolt, so there's probably nothing wrong with it.
The worn area of your bolt is the part of the bolt that first impacts the top of the rounds as they sit in the magazine. They then push the rounds forward clearing the mag lips and up on an angle into the chamber. If you load a loaded mag into the gun and pull back the charge handle you can see where the bottom lugs touch the top of the round. 200rds is just enough to show the wear on that new bolt. In time the whole finish on that bolt will wear, especially in places where it rubs.
If you are worried about the bolt not being square to the barrel extension look at the back of the lugs, not front. It's the back of the lugs that are hard up against the teeth of the extension when the round goes off. The front of the lugs are not touching anything on shot release.
On a side note, I was always taught to oil the backs of bolt lugs before firing while keeping the front of the bolt relatively dry.
The bolt wear is the finish coming off a new phosphated bolt, so there's probably nothing wrong with it.
The worn area of your bolt is the part of the bolt that first impacts the top of the rounds as they sit in the magazine. They then push the rounds forward clearing the mag lips and up on an angle into the chamber. If you load a loaded mag into the gun and pull back the charge handle you can see where the bottom lugs touch the top of the round. 200rds is just enough to show the wear on that new bolt. In time the whole finish on that bolt will wear, especially in places where it rubs.
If you are worried about the bolt not being square to the barrel extension look at the back of the lugs, not front. It's the back of the lugs that are hard up against the teeth of the extension when the round goes off. The front of the lugs are not touching anything on shot release.
On a side note, I was always taught to oil the backs of bolt lugs before firing while keeping the front of the bolt relatively dry.