Did the sentence of three hundred months violate the grossly disproportionate protection afforded by the unusual sentence prohibition under the Eighth Amendment because United States Sentencing guideline 2G2.2 was not the product of the institutional role of the United States Sentencing Commission?

Whether a 300-month sentence for a federal offense violates the Eighth Amendment's prohibition on grossly disproportionate sentences due to potential procedural flaws in United States Sentencing Guideline 2G2.2