Breda is an Italian firearms manufacturer and as such I would want to make sure that the rifle is chambered for the 6.5x54 M-S and not the 6.5 Carcano.
Yes you can chamber a M-S round and fire it in a Carcano but that is not something to make a habit of. The Lyman site, a model 36 if my memory is
correct is a great find! I got a NECG version 15-20 years ago and paid around $275.00 for it. I would be interested if it is indeed a 6.5x54 M-S
