By chance, does SN use a mash press?
I ask because I have it on very good authority (ie, one of their brewers) from another North Western brewery that does and as a result, the grain bills they use don't match what we can get out of our homebrew setups.
We were trying to clone their flagship, and turned to him for guidance. While he couldn't and didn't give us the recipe (contractually could not), he hinted that we were using far more dark grains than they do. Their mash press seems to produce a multiplier effect on the medium and dark malts that yields far higher SRM than we typically get at home.