 Modern militaries have since abandoned such cartridges for infantry rifle use, as they are unnecessary in typical engagements taking place at less than 300 meters.As it was, the 6.5 mm round with the Type 38 spitzer bullet had a desirable flat trajectory, and effective terminal ballistics with rapid yaw on impact causing severe wounds.Larger caliber military cartridges are also optimal for machine guns to use for long-range firing, and rifles were often only made to chamber them in the interest of logistics.