[ProtectOurFreedom]

One of the articles says that Confederate altered flintlock rifles were useless after six or seven rounds. That seems odd. Is it true? Why would that be?

[Homer_J_Simpson]

I have no idea, myself. Surely there are freepers who know.

[GranTorino]

Powder residue builds up in the barrel and makes loading almost impossible.
The modern rifled muskets used a miniball that was smaller than the bore diameter yet expanded to engage the rifling when the gun was fired.
This made it easy to load after continued firing.