The University of Virginia built a model for estimating the risk of significant injury due to skin penetration. All such models utilize approximations. The Johns Hopkins University Applied Physics Laboratory plans to implement this model into the JIFCO Blunt Impact modeling suite. The authors of this document characterize some shortcomings and limitations JHU/APL's planned implementation of the UVA skin penetration model by examining both the theoretical considerations of the model construct and on UVA's own experimental results. The authors also suggest a number of potential future enhancements to improve the accuracy of the model predictions.