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The profile appears put together on too large an action. Small, delicate barrels and a 12 Bore action.



Boss should have, could have even then, made a more appropriately sized action. This is reminiscent of a lot of older Doubles built on one size fits all actions. Most (not all) 360#2s are built on actions suitable for a 470, even though they end up weighing more than the 470 would.

Boss built smaller actions then and could have easily used one.

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I'm not so sure that they did use a 12g action for that rifle.
The 12g Boss action appears to be much deeper than the DR action in this photo.



Here is what 1930 Boss 12g actions look like. Take a look at the size of the trigger bow compared to the depth of the frame and compare the 12g to the DR.