Jack's rifle did not disappoint Gao Yang.
Gao Yang's marksmanship did not disappoint Jack.
The sky was clear, utterly windless, with dry air—it was perfect shooting weather. When Gao Yang shot from one hundred yards all the way to nine hundred yards, almost 800 meters, he did not miss once. He aimed exclusively at the head of the human-shaped target, hitting it every time, while most 7.62mm caliber sniper rifles, whether semi-automatic or bolt-action, could no longer guarantee hitting the torso at that distance.
For a 7.62mm caliber rifle, using standard 7.62x51mm cartridges, eight hundred meters is the maximum effective range. This limitation is not just due to the rifle, but also because the amount of propellant in the cartridge restricts the range. No matter how good the rifle is, if the bullet isn't powerful, it's useless. To achieve a longer range with the same caliber, you would need bullets like the .3006, which have a longer case and contain more propellant.