The gas-side heat transfer rates for LOX/propane and LOX/ethanol are experimentally characterized using a 1000-lb-thrust water-cooled calorimeter chamber operating at a chamber pressure of 300 psia. The effect of injector element type and fuel film cooling is defined as a function of mixture ratio. The interaction of fuel injected through the resonator cavities on heat transfer and wall soot buildup are displayed as a function of time, axial distance, fuel coolant flow rate, and mixture ratio. Comparisons between clean-burning ethanol and sooting propane show a large difference between the two fuels and significantly higher-than-expected heat-flux levels for ethanol in the throat region.