In our previous studies using the two-term impactor-shield localized interaction model, we derived the rule determining the order of the plates with different mechanical properties in a multilayer shield that yields a maximum ballistic limit velocity against conical impactors. In the present study we show that this rule is valid also for ogive-shaped, nonconical impactors. Several topics associated with the investigation of layering and spacing of the shields are extensively covered in the literature on high-speed penetration mechanics. Many studies have compared ballistic characteristics of monolithic shields with those of the shields composed of several plates with the same total thickness and manufactured from the same material. The plates may be in contact or there may be air gaps between them. Therefore, as alternatives to the monolithic shield, many types of shields with different numbers of plates and different thicknesses of the plates and of the air gaps are feasible. Analyses of the effect of the order of plates manufactured from different materials on the ballistic characteristics of the shield have attracted particular interest. The simplest case of this problem is interchanging the plates in a two-layered shield. In the general case, the number of plates may vary and they may be manufactured from different materials. The combined effects of changing the order of plates and of using air gaps on the ballistic performance of the shield and various problems of optimization of the structure of the shield have also been studied in a number of investigations. A brief survey of the state of the art presented below (mainly on penetration in metal shields) supports the assessment of [Radin and Goldsmith 1988] that “only limited results for multiple target materials exist in the literature..., and the results obtained cannot easily be correlated since different target and projectile materials, nose shapes, impact geometries and striker speeds were used”. Clearly, the latter assessment is not related to the problem of selecting the best shield among the given set of shields against the impactor with a given shape. This problem can be often solved experimentally, and the obtained results can be explained using relatively simple physical reasoning. The problem is to determine a more or less general law that will enable predicting the change of the ballistic characteristics of the shield by varying the structure of the shield. This problem has not been solved as yet, although a number of experimental and theoretical studies have been performed in this direction. Honda et al. [1930] investigated experimentally the impact of steel plates by conical-nosed projectiles. It was found that a shield composed of thin plates had a lower ballistic resistance than a monolithic shield