Hey Kirk, welcome to the fire. that is a SWEET Carbine you had built, fyi, I went w/a 6.5x47 last minute. It would be nice if they offer the SS in 260.
Your rifle should be the blueprint for what a T3 should be, in contour
What's the magazine length situation with the 308-based T3 rifles? Seems like I remember them having rather short allowable OAL's? I'm not up on Tikka these days, but like what I hear with regards to accuracy.