The physical characteristics of several TATB formulations were investigated for use in booster pellets. These formulations included fine particle size TATB, without binder and with 1% Kel-F binder and 2% Kel-F binder. Corresponding tests were performed on RX-03-BB (7.5% Kel-F) for comparison. Test samples from each formulation were prepared for thermal cycling, moisture resistance, compression, indirect tensile and density gradient.