None of the barrels are "proofed" the way Spanish barrels are. All manufactures, American, Spanish, Italian, Finish, Japanes, etc., have incumbent upon them, to produce rifles capable of withstanding well in excess of the maximum recommended loads. I would think, though I don't know,that every barrel fires a "proof load" before being boxed for shippment but this is not what "proofing" is and is not what the "proof mark" on a Spanish barrel means.

As far as testing to substantially higher pressures, how can you know that? If CVA doesn't make public their testing procedures, how could anyone know. We are often toldhow far American manufacturers go to test their rifles, but thats it, we are told, and its always in unscientific description, like the word, "substantially". I have yet to find any detailed description as a company release which outlines the rigors of any testing. I do though trust that everyone tests their products for safety.