According to the author, about how many rounds should be initially used to test a newly created projectile?

The author suggests that approximately 120 rounds should be used to test a newly created projectile. This number is significant because it allows for a comprehensive assessment of the projectile's performance across a range of conditions and variables. By firing a larger quantity, discrepancies in accuracy, stability, and overall reliability can be identified more effectively. Testing with 120 rounds caters to variations in environmental conditions, different shooting platforms, and shooter performance variability. This thorough approach ensures that the data gathered on the projectile is robust, enabling better understanding and refinement of its design.