CHARACTERIZING 5.56-mm CARTRIDGE PERFORMANCE WITH NOVEL MEASUREMENT TECHNIQUES

A Quantitative Method of Comparative Assessment of Primers Ignition Performances

“…From experience, after testing an important number of ammunition batches, it has been observed that ballistic performances of ammunition often vary / fall even when using exactly the same quantity and sort of propellant for the propelling charge. While trying to develop new types of primers, Ritter [4] also concluded that primer's performance subsequently resulted in rather different cartridge performances. These observations immediately raised two questions: How the primer's ignition performances influence the ballistic performances of the ammunition?…”

“…Some methods presented in the literature [4][5][6][7] indicate the power or brisance of the primer as key factor in estimating the ignition capacity. Ritter [4] fired fully charged ammunition using a laboratory weapon equipped with a pressure transducer mounted at the side of the cartridge case. In another work [6], the primer was fixed in a cartridge shell, which was mounted on a ballistic pendulum.…”

Effect of Annealing Process on the Performance of Pressure of the φ3.5mm×8.75mm Cylindrical Copper Cylinder

“…In order to eliminate or reduce the static-dynamic discrepancy of pressure-measuring copper cylinders, since 1970s, a major reform in the calibration system of plastic pressure measurement has been carried out abroad, which is, using a half sine pressure pulse with a similar dynamic characteristic like the rising of the bore pressure to carry out the quasi dynamic calibration of the plastic pressure measuring equipment [4], this is also the development trend of plastic pressure measuring method. [5] Aiming at the problems of to many static and dynamic differences and excessive equipment specifications in our country's static calibration system, we had once designed 3.5 x 8.75mm series of quasi dynamic calibration equipment of copper cylinders. The series of copper cylinders use the quasi dynamic calibration of a uniform prepress, it greatly reduces the static and dynamic differences in copper cylinders, and the measurement is more consistent with the electrical measurement, compared with the static calibration column, pressure measurement accuracy has been greatly improved.…”