Wow! I found this too! The SMI round, named after the letter marking 'SMI' found as the 'headstamp' on the cartridge base, was the conventional military round manufactured for the 6.5mm Italian Carcano rifles. While other rounds were manufactured elsewhere, this appears to be the dominant full metal jacketed round found in the United States. The rounds were made with corrosive primers and most do not detonate when struck with the firing pin. However, the bullets are usable if reloaded.