In the view of shortcomings in the current sampling inspection schemes, the consumer’s risk of the classical sampling inspection is improved. According to the principle of the new sampling inspection of ammunition products and the idea of MIL-STD-1916, sampling risks based on the qualified quality level are proposed. The formula of posterior risk of consumer was modified and derived under the condition of secondary sampling scheme and receiving criterion (0,2;1,2). The classical statistics and modified formula of risks is discussed and analyzed. The calculation results show that modified consumer risk is more in line with the actual situation and is beneficial to reduce sample size when the reliability level of the product is high.