The chances that the barrels are the weakest link n the gun are small. Despite the ability of the barrels to whitstand high pressure loads, the rest of the gun must be considered. High pressure will be felt by the hinge pin and hook, locking bolts, and frame (esp. at the angle from the bar to the fences). Heavy recoil will work on the wood.

As noted, "Krupp Steel" is not definitife as to strength.