From the author's personal collection...

Above: The author's Mannlicher-Carcano model 91 carbine.

Also shown are a clip loaded with 4 rounds and a box of Italian-made 6.5mm ammunition.

Above and below: Bullet comparisons...

LEFT: .308 (NATO 7.62mm)

CENTER: 6.5mm Carcano

RIGHT: 30/06 Springfield (7.62mm)

Notice the differences at a glance...

Official Dallas Police Department affidavits indentify the rifle recovered as a "7.65mm Mauser"

Experienced police recovered 3 spent casings AND an unfired round, yet...

still identified the weapon as 7.65mm !!