My Father owns an X-Bolt hunter .243, and I have an X-Bolt Hunter 7mm08. They were shooting consistent groups from day one. By consistent, I mean groupings within a 2" diameter at 100 yards.
We don't shoot much more than that while hunting so I can't comment beyond that. We also were not using a shooting bench, just a small sandbag and the hood of truck. So, not the most accurate shooting test either, but we each used our guns for the first time this year and we got our bucks.
Mine was a short shot of 45 yards, but my Father made a 120 yard shot for his kill.