First of all, the automatic loading in western countries is easily disturbed, and its range and power are greatly weakened. In today's information war, the automatic loader in western countries is extremely vulnerable to information attacks, and there will be radiation interference on the battlefield, which has great hidden dangers. In times of crisis, it is very likely that you will hit yourself at the rotating spear head, delay the fighter plane and miss the good opportunity to make enemies. On the other hand, the automatic loader limits the size and length of the warhead. Generally speaking, in order to increase the ammunition reserve and change the distance, the automatic loader reduces the specifications and length of ammunition, so its projectile power and shooting distance are far less than those of manual loading.

Secondly, the design of artillery shells is integrated, which reduces the manual handling distance and saves manpower. Compared with Russia's split-guided warhead, the United States has adopted an integrated design, which is more convenient for soldiers to carry shells in a shorter distance, and it is easy to avoid reassembling ammunition warheads like Russia, which greatly saves complex assembly links. Moreover, the United States only needs to find young and strong soldiers to carry out ammunition replacement operations.

Finally, the United States pays more attention to the research and development of artillery systems, aiming and locking functions, and the cost of training bomb changers is lower. For the United States, it pays more attention to aiming accuracy and the ability of combat artillery, and manually fills a transition. When the United States develops more advanced automatic loading technology, the United States will also adopt automatic loading devices. After all, automatic loading can save a lot of manpower and is also the main direction of future research.

At present, the manual filling method adopted in the United States has been continuously improved and upgraded, and it does not lag behind automatic filling. It's just that the two ways are different, and the needs and ideas are different. This doesn't mean who is stronger. For the future information warfare, the United States needs heavy artillery tanks more suitable for modern warfare. Tanks with automatic filling devices are not dominant in Russia and other countries, and may be merged in the future, but now they are high-tech ones.