Adam Clarke on Genesis 49:23

The chief archers - בעלי חצים baaley chitstsim, the masters of arrows - Joseph's brethren, who either used such weapons, while feeding their flocks in the deserts, for the protection of themselves and cattle, or for the purpose of hunting; and who probably excelled in archery. It may however refer to the bitter speeches and harsh words that they spoke to and of him, for they hated him, and could not speak peaceably to him, Gen 37:4. Thus they sorely afflicted him, and were incessantly scolding or finding fault.