It's a secret code.
The "C" at the beginning is an abbrevation of "Cash," because you only have to spend abbreviated cash to buy an accurate 6.5 Creedmoor.
The "reed" spelled backwards is "deer."
"Moor" is a common Campfire misspelling of "more."
Put it all together and it means more deer for less cash.
Damn, I think John actually solved it.
