I did some research years ago on the same weapon, the "
6.5 Mannlicher-Carcano"
the one fact that stood out the most to me was that the Carcano was made for front line fighting, a combat situation that didnt require much short or long range accuracy.
Quote from the posted link;
"After reports of inadequate performance at both short and long ranges during the campaigns in Italian North Africa (1924-1934),
and the Second Italo-Abyssinian War (1934), the Italian army introduced a new short rifle in 1938, the Modello 1938"