As the volume fraction of particles increases above 100 mg/mL, the viscosity of the formulated suspension remains low enough to allow syringeability. Here, the low volume fraction approximation of Einstein is no longer accurate, and the viscosities were correlated with the Krieger-Dougherty Equation for concentrated suspensions. The experimental settling rates are correlated with a modified Stokes settling model to account for the high particle volume fraction. The protein particle size and shape are designed with milling and precipitation based processes. In addition, the protein particles must be designed to prevent particle and protein aggregation. Even with concentrations above 100 mg/mL, samples were shown to be syringeable through a 27 gauge needle. In addition, these samples were redispersible by manual shaking after exposure for one year and did not show evidence of particle growth or aggregation.