At full blast and In full swing

In full swing and at full blast are semantically related. In some cases you can use "In full swing" instead the phrase "At full blast" as an adjective or an adverb.

In full swing adverb - Proceeding with full vigor.

At full blast and in full swing are semantically related. You can use "At full blast" instead the phrase "In full swing" as an adjective or an adverb.