http://worldcat.org/entity/work/id/137153682

Design, Development and Fabrication of Training Round to Simulate Projectile, 155-mm, HE, M107 (XM804) (Phase 1)

The following four design approaches (to develop a 155-mm Training Projectile (XM804) which would be similar to the standard 155-mm, HE, M107 Projectile but would be significantly more economical to manufacture) were investigated: (1) a forged body with 'heavy' walls; (2) an inert-filled (forged) M107 shell; (3) a pressure-cast shell; and (4) a sand-cast shell. The sand casting approach was eliminated early in the program based on preliminary studies which indicated that this method would not be cost effective. A forged 'heavy wall' XM804 Training Projectile design was developed which simulated the HE-loaded M107 Projectile ballistically and would withstand firing at Charge, Zone 7 as evidenced by dynamic tests. (Charge, Zone 5 is considered the maximum charge for training purposes.) Dynamic tests also showed that the inert wax load in the standard 155-mm, M107 Projectile can be replaced by the lower-cost inert Hydro-Cal load. A method for manufacturing the XM804 Projectile by pressure- casting was demonstrated successfully. Calculations based on this investigation indicated that the cost savings for the forged and the pressure-cast 'heavy wall' XM804 Projectile would be 41% and 48%, respectively, under the standard round cost.

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