I haven't seen any model 36 Terni rifles in 6.5X52mm. IIRC, the model 36 in 7.35mm was supposed to be the replacement for the 1891 in 6.5mm due to the generally acknowledged need for a more powerful cartridge. It's possible it was rebarreled with a 6.5X52mm barrel when 7.35X51mm got hard to find, or it could have been originally barreled in 6.5X52mm for whatever reason.
Never try to educate someone who resists knowledge at all costs.
But what do I know?