Is there any documentation that suggests small priming horns were carried to prime with ? or were most rifles and fowlers primed from the main horn ?
It is a yes and no type of question. The old saw goes like this.
What time period? Where? And Who is using it?
In the 18th Century....unlikely.
Early 19th Century....possible. This is the part about where and who. Military, Militia using cartridge boxes or a market hunter type.
Mid 19th Century...likely.
Finer powders being available in the timeline also comes into play.