The goal of this paper is to present additional data on “anomalous burning” of monomodal propellants, and their effect on bimodal propellants. Such information is needed for modeling the burning of bimodal propellants and rational design of highsolids, plateau-burning propellants. The results include the determination of the no-burn conditions for these very fuel-rich monomodal pocket propellants (or matrices) based on particle size, oxidizer-to-fuel ratio, type of binder, and pressure. For several conditions, the dependence of burning rate on pressure is shown (selected combinations of AP size, oxidizer-to-fuel ratio and binder that are near the no-burn domain). A family of bimodal propellants derived from these matrices is then tested. The burning rates and quenched surface features of these propellants are presented for comparison to the corresponding matrices. © 1998 by J. M. Freeman, E. W. Price, R. K. Sigman, and S. R. Chakravarthy. Published by the American Institute of Aeronautics and Astronautics, Inc.