Not knowing the entire context, the only
". . .steeles . . . channelld where ye flints strike"
that I know of, consistently, are Spanish locks.
Today we call them miquelet locks, back then they were just the Spanish lock. The steel of a Spanish lock has vertical grooves in it. Some steels are dovetailed in & held with a screw so they may easily be replaced when worn out.
The Spanish lock is said to fire reliably even with a lousey flint, as heavy mainspring made the cock strike so hard.
Maybe this indicates that they got their trade guns from Spain? The American southeast bordered on Spanish possessions, e.g. Florida, Mexico &c.