Dotchicco
I can't open your photos either, you should upload them again.
Anyway, congratulations on your choice as M66 are excellent rifles; I have been owning two of them in 7x64 and 8x68S since the 70's and they are the most accurate rifles I have on shelf.
With regards to the choice of the caliber you may now need to import buffalo and brown bear into Italy, if you don't want to blast our common European roe deer, red deer and wild boar. If you only buy commercial ammunition, I am not sure you will get a wide choice (RWS only sells two types of bullets in 11,9 grams/184 grains and 19 grams/293 grains) but if you reload you would probably have a wider choice of options.
Louis