Partial Report on Engineering Test of Charge, Propelling, 155-MM, XM119, with Projectile, 155-MM, HE, M107, for Howitzer, 155-MM, M126 (T255E3) (Erosion Phase).
Rept. for 3 Feb-27 Mar 64,
DEVELOPMENT AND PROOF SERVICES ABERDEEN PROVING GROUND MD
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An erosion life test was conducted from the 155-mm howitzer, M126. Firing was conducted with the M107 projectile and XM119 propelling charge to determine the accuracy tube life with the newly developed charge. Testing consisted of firing for range accuracy, fuze functioning performance, and recovery as well as firing with special selected variations of ammunition types or conditions of test following determination of the end of accurate tube life. A wear rate curve was established for a limited number of rounds fired with the XM119 propelling charge with a wear reducing additive composition. The tube effects on the functioning of all projectile initiating fuzes used were considered acceptable. The firing of a special obturator equipped projectile proved successful in preventing gas erosion of the rotating band. The limited firing performed with wear reducing additive assembled to the XM119 charge indicated a greatly reduced rate of tube wear.