To be fair, Paul does have many things in his books which makes me question the quality of his info. For example his book on Mannlichers he has a improperly loaded Mannlicher clip in a photo. He does mention several times that he uses others collections to get his data, which generally means he isn't a expert in the subject himself.
With Mannlichers and Commission rifles I take all data with a grain of salt, as there is so much misinformation floating around it gets hard to separate the wheat from the chaff.