It is expensive and time-consuming to scale up the processing of a new explosive molecule or formulation to produce a sufficient quantity of material to characterize the detonation performance. The calculated performance does not always correspond with measured performance, so there is also a concern that the time and resources expended in firing performance tests on a new material may not be justified by the outcome. We have developed a smallscale test that permits a preliminary characterization of the performance of a new explosive using only a few grams of material. We have performed the test on several explosives in common use. These include LX-10 (95% HMX/5% Viton A binder), LX-16 (96% PETN/4% FPC 461 binder) and LX-17 (92.5% TATB/7.5% Kel-F 800 binder). The test results agree well with with calculations which use equations of state that have been measured in cylinder tests1. We can also directly compare a new material with the test results on these well-known explosives.We have used the new test to characterize an explosive that we have recently synthesized, 2,6-diamino-3,5-dinitropyrazine-1-oxide (LLM-105), an insensitive energetic materialwith 25% greater power than TATB. The energy content and thermalstabil ity of this materialmake it very interesting for several applications, including insensitive boosters and detonators. In this paper we will describe the evaluation of LLM-105 with only 30 grams of material.