I built myself a heated shooting stall in a shed in the back yard, and have run about 300 rounds through the rifle in relative comfort now.

It's quite happy with Hornady 55gr Steel Match, with 5 round groups running somewhere between .5"-.8" at 100 depending on how I'm doing at the trigger. Winchester 45gr JHP is also pretty consistent, staying well under an inch at 100 or 2" at 200 for as long as I want to pull the trigger. 75gr Hornady Steel Match was disappointing though, coming in at 1.5" for ten 5 shot groups.
Once I get the rest of the factory ammo used up it'll be time to get into reloading. Hopefully I can get the group size around 1/2", but if not I'll get a Gaillard barrel spun on next winter. Hopefully my skill set will have improved enough by then that I won't be wasting its potential.
A few observations now that the initial excitement has passed:
I have yet to find the slightest trace of copper fouling in the barrel. I use Wipe-Out exclusively, and there has been no hint of blue on any patch pushed through. I can't seem to get all of the carbon (I believe) out though...maybe the carb cleaner will have to come out for the next cleaning, seeing as 7 applications of Wipe-Out hasn't done it yet.
I've come to not like the finish on the MDT. Totally subjective personal preference...but it's rough, the pieces are mis-matched and I'm not sure how durable it is, as there are a couple of marks on/in it from very light use (no bangs, drops or smacks). Anyone know of a shop that could re-anodize it with a nice smooth finish?
The Sightron scope is amazing. The side focus is incredibly precise, and being able to see bullet holes at 300 yards makes a spotting scope redundant. The eyepiece flip cap keeps falling off though, so a Butler Creek will be going on soon. The Burris PEPR installed "backwards" keeps everything away from my digits when operating the bolt, plus it's a nice solid mount.