proficiency vs musketry

proficiency and musketry both are nouns.

Word	Noun	Adjective	Verb	Adverb
proficiency	Yes	No	No	No
musketry	Yes	No	No	No

As nouns, musketry is a hyponym of proficiency; that is, musketry is a word with a more specific, narrower meaning than proficiency:

proficiency: skillfulness in the command of fundamentals deriving from practice and familiarity
musketry: the technique of using small arms (especially in battle)

Other hyponyms of proficiency include brushwork.

proficiency (noun)	musketry (noun)
the quality of having great facility and competence	the technique of using small arms (especially in battle)
skillfulness in the command of fundamentals deriving from practice and familiarity	musketeers and their muskets collectively