Pugwash & Transvaal,

What do you see are the basic differences between a shotgun and a rifle action (sidelock back action) ?

Is it the length, depth and width of the watertable that differ between the two ??

If these dimensions, for the double rifle action build, wouldn't this sidelock be suitable ??

I understand that the Back action is more suitable than the Bar action as it leaves more material in the water table/elbow area of the action - where it wants to flex. But many good double rifles are also built on Bar actions.