I have a 16.5inch barrel 783 in .308. Its a nice shooter, I had it in a MDT LSS chassis but I just didn't like the feel of using a buffer tube style stock and I couldn't get the grip to feel natural so now I'm back to the Tupperware stock (meh). I either need to work on the stock cause its noodle-ish, or find another more rigid stock for it. Other than the stock it came with, I really like the rifle, especially for the price.
The photo Gimpy Golden just posted has me thinking I might have just bought the wrong MDT chassis cause that XRS looks comfy. I might try that one.