According to the inquiry method, the bullet shell can't pass the security check, which generally refers to the security check. Safety inspection refers to the inspection of the implementation of safety production laws and regulations, safety production conditions, working conditions and hidden dangers of accidents in construction projects. The main contents of safety inspection include checking ideas, checking systems, checking machinery and equipment, checking safety and health facilities, checking safety education and training, checking the behavior of production personnel, checking the construction of protective facilities, and checking the handling of casualty accidents. According to Article 128 of the Criminal Law of People's Republic of China (PRC), anyone who illegally holds or hides guns and ammunition shall be sentenced to fixed-term imprisonment of not more than three years, criminal detention or serious control, and shall be sentenced to fixed-term imprisonment of not less than three years but not more than seven years.

Legal analysis: It is not illegal to hide the shell casings without gunpowder and bullets. Bullet casings are not under the control of firearms and ammunition, but it is illegal to collect bullets containing gunpowder and bullets.