I am saying that monos are being blamed for causing OSR. I do not understand this because all the rifles that are mentioned as exhibiting OSR, were not fired exclusively with monos.
Some were fired with lead core bullets and never with monos. Some were fired with lead core bullets and with monos. None were fired with monos only. Many rifles that were fired extensively with monos show no sign of OSR.

So this sentence means exactly what it says: "All the evidence points to the fact that it is the use of the double that causes OSR and not the use of a particular bullet type."

Simply put: Use a double and it may develop OSR, regardless of what type of bullet is used.