I have one built off of a Winchester 770 action (an older, bargain version of the post-64 win). After fireforming Winchester 22-250 brass, I threw together some loads with 107 SMKs. If the 5, 5-shot groups that I've fired, none were greater than 0.4", with the smallest group being in the uppper 0.2's.
I REALLY like this round so far. I've had a number of 6mmBR's, and for what I do, I think the 6XC will trump the 6mmBR. The 6mmBR has a bit more accuracy potential, but the reliable feeding of the 6XC is more important to me in a hunting rifle. I've been strongly considering pulling apart my remaining 6mmBR and making a lightweight 6XC.
For what you are describing, the 6XC sounds perfect.
