EROSION TEST ON 5.56MM RIFLE BARRELS SMALL ARMS WEAPON SYSTEMS STUDY (SAWS).

摘要

Results are reported on limited erosion testing of three barrels each fabricated from AISI/SAE 4150steel and CR-MO-V steel,with and without chromium plated bores,tabulated test data include projectile velocities,land and groove diameters,temperature versus time curves,and ammunition expenditures,the unplated 4150steel barrels were rejected after approximately 1900rounds were fired at 60shots per minute. Rejection was based upon the projectile instability criterion,exceeding 15-degree yaw. The chromium plated 4150,and the unplated and chromium plated CR-MO-V barrels withstood 3600rounds fired at rates of 60and 80shots per minute. (Author)