IMHO.I feel that you did ask the wrong question, Sako must have heaved a sigh of relief when you queried the proof you let them off the hook. The question I would have asked is this "How did this rifle go through your production process, pass your in house quality control, final inspection and testing, then packaged for sale?" My final request would be "can I have your thoughts on this serious matter in writing? I am sure that would put the cat in the hen house.
If it has full proof marks that is an other can of worms that could be opened at a later date, the proof house could be at fault though may be not. Though more important the manufacturer produced a product that is not of merchantable quality or fit for purpose.
