Yes they are. I have a couple of small shank action rifles and 1 large shank action rifle. They all measure 1.355" OD.
I swap them all to different stocks depending on what I want to do that day.
These are all short action, and I would assume the long actions are the same.
If I needed to, I wouldn't hesitate to open up a small shank action to accept a large shank barrel. Savage does it.
A good machinist with a coolant system is not going to heat the action up to change anything, IN MY OPINION
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