OK, a small update from internet research. It seems that the i-Bolt may "share" the same receiver dimensions as the Remington 700. To prove or disprove this, my LGS is going to test fit the S&W action in a Remington take-off stock today. We shall see what happens and I'll pass the results along.
NRA Chief Range Safety Officer, Home Firearm Safety and Pistol Instructor
"There are three classes of people: those who see, those who see when they are shown, those who do not see."
Leonardo da Vinci