Abstract : This report documents the Work performed during the third year of a multi-year project was aimed at understanding the physical and mechanical characteristics of a typical nylon obturator band as it reacts to the balloting (wobbling) motion of a projectile traveling down a gun barrel. In particular, the resisting or bore were investigated. Past year's efforts have centered upon gaining an understanding of the basic mechanics of this type of motion, and have been constrained to one projectile/band geometry. This year, we were able to extend the experiments and analysis to different band geometries. In particular, we were able to model a geometry very similar to the obturator of the current 120mm APFSDS projectile. Results from the experiments and analysis show that, although the foundation moment of a band with this geometry is less than that of a straight band, the moment is still large. The conclusion has been made in past years that the foundation moment is probably the dominant force on the projectile early in the ballistic cycle. The current work substantiates this result, and extends it to include representative geometries for projectiles obturator bands. One of the conclusions from the work done last year to estimate foundation moment was that the non-linear material behavior of the nylon band was very important to that estimation. Therefore, this year's work included the measurement of the mechanical properties of the nylon materials under quasistatic conditions and simulated ballistic loading conditions.