John Barsness just purchased a Ruger Hawkeye chambered for the 375 Ruger. He bought it off the shelf of a local gunshop himself, Ruger did not send the rifle to him to evaluate. He confirms the case size is as Mike and I reported and differs than his editor Scovill reported in Handloader magazine.

Barsness Post
Look for the post from "Mule Deer" with the signature John Barsness