The Army Research Laboratory has constructed an indoor, rail-mounted, synthetic aperture radar (SAR) system capable of simulating airborne data collection geometries. The collection facility includes both a "building within a building" for through-the-wall measurements and a "sand pit" for buried-target measurements. While we collect background measurements for the purpose of clutter removal, the elimination of multi-path responses due to target emplacements presents a significant problem. These multipath effects can manifest themselves as artifacts in the processed SAR imagery - artifacts that were observed in data presented at last year"™s Defense, Security and Sensing Radar Sensor Technology conference. In this paper, we present the results of additional data collections and analysis performed to identify the source of observed Rail-SAR artifacts. We analyze data collected using various target-emplacement scenarios and describe the procedures developed to eliminate artifacts in future Rail-SAR experiments. We examine results obtained both with and without the new measurement procedures in place.