What is interesting about this particular rammer are the markings which resemble those applied by the Brits. At first glance the markings appear to look like a number "95" over a "C", but it is an oblique view so nothing definitely.
The rammer could be for what collectors refer to as a Type III Pattern 1793 or Pattern 1809 Bess. Those muskets had 39" long barrels. But, that is a first impression of the limited view of the markings.