.............I had an Italian Carcano for several years, chambered 6.5x52. Shot it enough to prove that it was a capable firearm. Not long after I sold it I acquired another Carcano, and this one was 7.35 x 51. I forget who made the 6.5mm but this one was made by Terni in 1939. It's in excellent condition, and as such must not have seen much fighting? Some folks have a hard time with, or bad mouth the fixed sights. In all truth, the sights were very well thought out, and show a bit of intelligence for a few reasons. It's SA stamped so it went to Finnland.
The sights work great out to 400 yards, and their intended target was a tall(ish) narrow target about 18" wide or so. Depending upon the estimated range, you would hold your front sight in varying positions to hit from 50 yards to 400 yards in about 4 positions IIRC. In real world combat, the Italian sights were really all that was required for 98% of a soldiers' shooting requirements. The 7.35x51 was definitely enough of a cartridge to take an opponent off the battlefield for quite some time, if not forever, with a hit.
It's been quite some time since I discussed it but if memory serves, holding the top of the inverted 'V' front sight even with the top of the rear sight, at 100 yards holding 6 o'clock on a 6" bull your shot would be in the top of the black. So you could use that hold easily out to 200 yards and still land in a 6" bull. Or out further and make a torso hit.
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.................Buckshot