you seem to already know as much and possibly more than I do. I have heard about 8mm conversions but never actually seen one, but also read all of the reports that they were unsafe to fire. I know the carcano itself is a heavily sporterized model, probably done by an importer to save customers to hassle of doing it themselves. the last time I went to cabelas, which was nearly a year ago they had nearly 2 dozen carcanos sitting in the used gun racks and almost all of them were sporterized in almost identical fashions, suggesting mass sporterization efforts. the rifle was more than likely bought after WWII when surplus rifles were very popular as cheap alternatives to hunting rifles.
ignore my complete lack of capitalization. I still have no problem correcting your grammar.
I never said half the stuff people said I did-Albert Einstein
You can't believe everything you read on the internet-Benjamin Franklin